merge master

42 files changed, 947 insertions, 839 deletions

diff --git a/src/crepe/api/CMakeLists.txt b/src/crepe/api/CMakeLists.txt
index 46deb67..8f84f06 100644
--- a/src/crepe/api/CMakeLists.txt
+++ b/src/crepe/api/CMakeLists.txt
@@ -13,16 +13,14 @@ target_sources(crepe PUBLIC
 	Animator.cpp
 	BoxCollider.cpp
 	CircleCollider.cpp
-	IKeyListener.cpp
-	IMouseListener.cpp
 	LoopManager.cpp
-	LoopTimer.cpp
 	Asset.cpp
 	EventHandler.cpp
 	Script.cpp
 	Button.cpp
 	UIObject.cpp
 	AI.cpp
+	Scene.cpp
 )
 
 target_sources(crepe PUBLIC FILE_SET HEADERS FILES
@@ -39,6 +37,7 @@ target_sources(crepe PUBLIC FILE_SET HEADERS FILES
 	Vector2.hpp
 	Color.h
 	Scene.h
+	Scene.hpp
 	Metadata.h
 	Camera.h
 	Animator.h
@@ -47,10 +46,7 @@ target_sources(crepe PUBLIC FILE_SET HEADERS FILES
 	EventHandler.h
 	EventHandler.hpp
 	Event.h
-	IKeyListener.h
-	IMouseListener.h
 	LoopManager.h
-	LoopTimer.h
 	Asset.h
 	Button.h
 	UIObject.h
diff --git a/src/crepe/api/Config.h b/src/crepe/api/Config.h
index fae31f4..d11f3f2 100644
--- a/src/crepe/api/Config.h
+++ b/src/crepe/api/Config.h
@@ -45,8 +45,12 @@ struct Config final {
 
 	//! Physics-related settings
 	struct physics { // NOLINT
-		//! Gravity value of physics system
-		double gravity = 1;
+		/**
+		 * \brief gravity value of physics system
+		 *
+		 * Gravity value of game.
+		 */
+		float gravity = 10;
 	} physics;
 
 	//! Default window settings
diff --git a/src/crepe/api/IKeyListener.cpp b/src/crepe/api/IKeyListener.cpp
deleted file mode 100644
index 8642655..0000000
--- a/src/crepe/api/IKeyListener.cpp
+++ /dev/null
@@ -1,19 +0,0 @@
-#include "IKeyListener.h"
-
-using namespace crepe;
-
-// Constructor with specified channel
-IKeyListener::IKeyListener(event_channel_t channel)
-	: event_manager(EventManager::get_instance()) {
-	this->press_id = event_manager.subscribe<KeyPressEvent>(
-		[this](const KeyPressEvent & event) { return this->on_key_pressed(event); }, channel);
-	this->release_id = event_manager.subscribe<KeyReleaseEvent>(
-		[this](const KeyReleaseEvent & event) { return this->on_key_released(event); },
-		channel);
-}
-
-// Destructor, unsubscribe events
-IKeyListener::~IKeyListener() {
-	event_manager.unsubscribe(this->press_id);
-	event_manager.unsubscribe(this->release_id);
-}
diff --git a/src/crepe/api/IKeyListener.h b/src/crepe/api/IKeyListener.h
deleted file mode 100644
index 180a0a6..0000000
--- a/src/crepe/api/IKeyListener.h
+++ /dev/null
@@ -1,50 +0,0 @@
-#pragma once
-
-#include "../manager/EventManager.h"
-
-#include "Event.h"
-#include "EventHandler.h"
-
-namespace crepe {
-
-/**
- * \class IKeyListener
- * \brief Interface for keyboard event handling in the application.
- */
-class IKeyListener {
-public:
-	/**
-	 * \brief Constructs an IKeyListener with a specified channel.
-	 * \param channel The channel ID for event handling.
-	 */
-	IKeyListener(event_channel_t channel = EventManager::CHANNEL_ALL);
-	virtual ~IKeyListener();
-	IKeyListener(const IKeyListener &) = delete;
-	IKeyListener & operator=(const IKeyListener &) = delete;
-	IKeyListener & operator=(IKeyListener &&) = delete;
-	IKeyListener(IKeyListener &&) = delete;
-
-	/**
-	 * \brief Pure virtual function to handle key press events.
-	 * \param event The key press event to handle.
-	 * \return True if the event was handled, false otherwise.
-	 */
-	virtual bool on_key_pressed(const KeyPressEvent & event) = 0;
-
-	/**
-	 * \brief Pure virtual function to handle key release events.
-	 * \param event The key release event to handle.
-	 * \return True if the event was handled, false otherwise.
-	 */
-	virtual bool on_key_released(const KeyReleaseEvent & event) = 0;
-
-private:
-	//! Key press event id
-	subscription_t press_id = -1;
-	//! Key release event id
-	subscription_t release_id = -1;
-	//! EventManager reference
-	EventManager & event_manager;
-};
-
-} // namespace crepe
diff --git a/src/crepe/api/IMouseListener.cpp b/src/crepe/api/IMouseListener.cpp
deleted file mode 100644
index 989aeb3..0000000
--- a/src/crepe/api/IMouseListener.cpp
+++ /dev/null
@@ -1,29 +0,0 @@
-#include "IMouseListener.h"
-
-using namespace crepe;
-
-IMouseListener::IMouseListener(event_channel_t channel)
-	: event_manager(EventManager::get_instance()) {
-	this->click_id = event_manager.subscribe<MouseClickEvent>(
-		[this](const MouseClickEvent & event) { return this->on_mouse_clicked(event); },
-		channel);
-
-	this->press_id = event_manager.subscribe<MousePressEvent>(
-		[this](const MousePressEvent & event) { return this->on_mouse_pressed(event); },
-		channel);
-
-	this->release_id = event_manager.subscribe<MouseReleaseEvent>(
-		[this](const MouseReleaseEvent & event) { return this->on_mouse_released(event); },
-		channel);
-
-	this->move_id = event_manager.subscribe<MouseMoveEvent>(
-		[this](const MouseMoveEvent & event) { return this->on_mouse_moved(event); }, channel);
-}
-
-IMouseListener::~IMouseListener() {
-	// Unsubscribe event handlers
-	event_manager.unsubscribe(this->click_id);
-	event_manager.unsubscribe(this->press_id);
-	event_manager.unsubscribe(this->release_id);
-	event_manager.unsubscribe(this->move_id);
-}
diff --git a/src/crepe/api/IMouseListener.h b/src/crepe/api/IMouseListener.h
deleted file mode 100644
index e19897d..0000000
--- a/src/crepe/api/IMouseListener.h
+++ /dev/null
@@ -1,73 +0,0 @@
-#pragma once
-
-#include "../manager/EventManager.h"
-
-#include "Event.h"
-#include "EventHandler.h"
-
-namespace crepe {
-
-/**
- * \class IMouseListener
- * \brief Interface for mouse event handling in the application.
- */
-class IMouseListener {
-public:
-	/**
-	 * \brief Constructs an IMouseListener with a specified channel.
-	 * \param channel The channel ID for event handling.
-	 */
-	IMouseListener(event_channel_t channel = EventManager::CHANNEL_ALL);
-	virtual ~IMouseListener();
-	IMouseListener & operator=(const IMouseListener &) = delete;
-	IMouseListener(const IMouseListener &) = delete;
-	IMouseListener & operator=(const IMouseListener &&) = delete;
-	IMouseListener(IMouseListener &&) = delete;
-
-	/**
-	 * \brief Move assignment operator (deleted).
-	 */
-	IMouseListener & operator=(IMouseListener &&) = delete;
-
-	/**
-	 * \brief Handles a mouse click event.
-	 * \param event The mouse click event to handle.
-	 * \return True if the event was handled, false otherwise.
-	 */
-	virtual bool on_mouse_clicked(const MouseClickEvent & event) = 0;
-
-	/**
-	 * \brief Handles a mouse press event.
-	 * \param event The mouse press event to handle.
-	 * \return True if the event was handled, false otherwise.
-	 */
-	virtual bool on_mouse_pressed(const MousePressEvent & event) = 0;
-
-	/**
-	 * \brief Handles a mouse release event.
-	 * \param event The mouse release event to handle.
-	 * \return True if the event was handled, false otherwise.
-	 */
-	virtual bool on_mouse_released(const MouseReleaseEvent & event) = 0;
-
-	/**
-	 * \brief Handles a mouse move event.
-	 * \param event The mouse move event to handle.
-	 * \return True if the event was handled, false otherwise.
-	 */
-	virtual bool on_mouse_moved(const MouseMoveEvent & event) = 0;
-
-private:
-	//! Mouse click event id
-	subscription_t click_id = -1;
-	//! Mouse press event id
-	subscription_t press_id = -1;
-	//! Mouse release event id
-	subscription_t release_id = -1;
-	//! Mouse move event id
-	subscription_t move_id = -1;
-	//! EventManager reference
-	EventManager & event_manager;
-};
-
-} //namespace crepe
diff --git a/src/crepe/api/LoopManager.cpp b/src/crepe/api/LoopManager.cpp
index 1f0ba72..b5e5ff7 100644
--- a/src/crepe/api/LoopManager.cpp
+++ b/src/crepe/api/LoopManager.cpp
@@ -1,3 +1,6 @@
+#include "../facade/SDLContext.h"
+#include "../manager/EventManager.h"
+#include "../manager/LoopTimerManager.h"
 #include "../system/AISystem.h"
 #include "../system/AnimatorSystem.h"
 #include "../system/AudioSystem.h"
@@ -7,7 +10,7 @@
 #include "../system/PhysicsSystem.h"
 #include "../system/RenderSystem.h"
 #include "../system/ScriptSystem.h"
-#include "manager/EventManager.h"
+#include "../util/Log.h"
 
 #include "LoopManager.h"
 
@@ -22,62 +25,62 @@ LoopManager::LoopManager() {
 	this->load_system<RenderSystem>();
 	this->load_system<ScriptSystem>();
 	this->load_system<InputSystem>();
+	this->event_manager.subscribe<ShutDownEvent>(
+		[this](const ShutDownEvent & event) { return this->on_shutdown(event); });
 	this->load_system<AudioSystem>();
 	this->load_system<AISystem>();
 }
-
-void LoopManager::process_input() { this->get_system<InputSystem>().update(); }
-
 void LoopManager::start() {
 	this->setup();
 	this->loop();
 }
-void LoopManager::set_running(bool running) { this->game_running = running; }
 
-void LoopManager::fixed_update() {
-	// TODO: retrieve EventManager from direct member after singleton refactor
-	EventManager & ev = this->mediator.event_manager;
-	ev.dispatch_events();
-	this->get_system<ScriptSystem>().update();
-	this->get_system<AISystem>().update();
-	this->get_system<PhysicsSystem>().update();
-	this->get_system<CollisionSystem>().update();
-	this->get_system<AudioSystem>().update();
+void LoopManager::setup() {
+	this->game_running = true;
+	this->loop_timer.start();
+	this->scene_manager.load_next_scene();
 }
 
 void LoopManager::loop() {
-	LoopTimer & timer = this->loop_timer;
-	timer.start();
+	try {
+		while (game_running) {
+			this->loop_timer.update();
 
-	while (game_running) {
-		timer.update();
+			while (this->loop_timer.get_lag() >= this->loop_timer.get_fixed_delta_time()) {
+				this->fixed_update();
+				this->loop_timer.advance_fixed_elapsed_time();
+			}
 
-		while (timer.get_lag() >= timer.get_fixed_delta_time()) {
-			this->process_input();
-			this->fixed_update();
-			timer.advance_fixed_update();
+			this->frame_update();
+			this->loop_timer.enforce_frame_rate();
 		}
-
-		this->update();
-		this->render();
-
-		timer.enforce_frame_rate();
+	} catch (const exception & e) {
+		Log::logf(Log::Level::ERROR, "Exception caught in main loop: {}", e.what());
+		this->event_manager.trigger_event<ShutDownEvent>(ShutDownEvent{});
 	}
 }
 
-void LoopManager::setup() {
-	LoopTimer & timer = this->loop_timer;
-	this->game_running = true;
-	this->scene_manager.load_next_scene();
-	timer.start();
-	timer.set_fps(200);
+// will be called at a fixed interval
+void LoopManager::fixed_update() {
+	this->get_system<InputSystem>().update();
+	this->event_manager.dispatch_events();
+	this->get_system<ScriptSystem>().update();
+	this->get_system<AISystem>().update();
+	this->get_system<PhysicsSystem>().update();
+	this->get_system<CollisionSystem>().update();
+	this->get_system<AudioSystem>().update();
 }
 
-void LoopManager::render() {
-	if (!this->game_running) return;
-
+// will be called every frame
+void LoopManager::frame_update() {
+	this->scene_manager.load_next_scene();
 	this->get_system<AnimatorSystem>().update();
+	//render
 	this->get_system<RenderSystem>().update();
 }
 
-void LoopManager::update() {}
+bool LoopManager::on_shutdown(const ShutDownEvent & e) {
+	this->game_running = false;
+	// propagate to possible user ShutDownEvent listeners
+	return false;
+}
diff --git a/src/crepe/api/LoopManager.h b/src/crepe/api/LoopManager.h
index 1bafa56..40e6b38 100644
--- a/src/crepe/api/LoopManager.h
+++ b/src/crepe/api/LoopManager.h
@@ -4,16 +4,15 @@
 
 #include "../facade/SDLContext.h"
 #include "../manager/ComponentManager.h"
+#include "../manager/EventManager.h"
+#include "../manager/LoopTimerManager.h"
+#include "../manager/Mediator.h"
 #include "../manager/ResourceManager.h"
 #include "../manager/SaveManager.h"
 #include "../manager/SceneManager.h"
 #include "../system/System.h"
 
-#include "LoopTimer.h"
-#include "manager/ResourceManager.h"
-
 namespace crepe {
-
 /**
  * \brief Main game loop manager
  *
@@ -21,8 +20,14 @@ namespace crepe {
  */
 class LoopManager {
 public:
-	void start();
 	LoopManager();
+	/**
+	 * \brief Start the gameloop
+	 *
+	 * This is the start of the engine where the setup is called and then the loop keeps running until the game stops running.
+	 * The Game programmer needs to call this function to run the game. This should be done after creating and adding all scenes.
+	 */
+	void start();
 
 	/**
 	 * \brief Add a new concrete scene to the scene manager
@@ -47,47 +52,20 @@ private:
 	void loop();
 
 	/**
-	 * \brief Function for handling input-related system calls.
-	 *
-	 * Processes user inputs from keyboard and mouse.
-	 */
-	void process_input();
-
-	/**
 	 * \brief Per-frame update.
 	 *
 	 * Updates the game state based on the elapsed time since the last frame.
 	 */
-	void update();
-
-	/**
-	 * \brief Late update which is called after update().
-	 *
-	 * This function can be used for final adjustments before rendering.
-	 */
-	void late_update();
+	virtual void frame_update();
 
 	/**
 	 * \brief Fixed update executed at a fixed rate.
 	 *
 	 * This function updates physics and game logic based on LoopTimer's fixed_delta_time.
 	 */
-	void fixed_update();
-
-	/**
-	 * \brief Set game running variable
-	 *
-	 * \param running running (false = game shutdown, true = game running)
-	 */
-	void set_running(bool running);
-
-	/**
-	 * \brief Function for executing render-related systems.
-	 *
-	 * Renders the current state of the game to the screen.
-	 */
-	void render();
+	virtual void fixed_update();
 
+	//! Indicates whether the game is running.
 	bool game_running = false;
 
 private:
@@ -98,21 +76,29 @@ private:
 	ComponentManager component_manager{mediator};
 	//! Scene manager instance
 	SceneManager scene_manager{mediator};
+	//! LoopTimerManager instance
+	LoopTimerManager loop_timer{mediator};
+	//! EventManager instance
+	EventManager event_manager{mediator};
 	//! Resource manager instance
 	ResourceManager resource_manager{mediator};
 	//! Save manager instance
 	SaveManager save_manager{mediator};
 	//! SDLContext instance
 	SDLContext sdl_context{mediator};
-	//! LoopTimer instance
-	LoopTimer loop_timer{mediator};
 
 private:
 	/**
+	 * \brief Callback function for ShutDownEvent
+	 *
+	 * This function sets the game_running variable to false, stopping the gameloop and therefor quitting the game.
+	 */
+	bool on_shutdown(const ShutDownEvent & e);
+	/**
 	 * \brief Collection of System instances
 	 *
 	 * This map holds System instances indexed by the system's class typeid. It is filled in the
-	 * constructor of \c LoopManager using LoopManager::load_system.
+	 * constructor of LoopManager using LoopManager::load_system.
 	 */
 	std::unordered_map<std::type_index, std::unique_ptr<System>> systems;
 	/**
diff --git a/src/crepe/api/LoopTimer.cpp b/src/crepe/api/LoopTimer.cpp
deleted file mode 100644
index 56e48d3..0000000
--- a/src/crepe/api/LoopTimer.cpp
+++ /dev/null
@@ -1,79 +0,0 @@
-#include <chrono>
-
-#include "../util/Log.h"
-#include "facade/SDLContext.h"
-#include "manager/Manager.h"
-
-#include "LoopTimer.h"
-
-using namespace crepe;
-
-LoopTimer::LoopTimer(Mediator & mediator) : Manager(mediator) {
-	dbg_trace();
-	mediator.timer = *this;
-}
-
-void LoopTimer::start() {
-	this->last_frame_time = std::chrono::steady_clock::now();
-	this->elapsed_time = std::chrono::milliseconds(0);
-	this->elapsed_fixed_time = std::chrono::milliseconds(0);
-	this->delta_time = std::chrono::milliseconds(0);
-}
-
-void LoopTimer::update() {
-	auto current_frame_time = std::chrono::steady_clock::now();
-	// Convert to duration in seconds for delta time
-	this->delta_time = std::chrono::duration_cast<std::chrono::duration<double>>(
-		current_frame_time - last_frame_time);
-
-	if (this->delta_time > this->maximum_delta_time) {
-		this->delta_time = this->maximum_delta_time;
-	}
-
-	this->delta_time *= this->game_scale;
-	this->elapsed_time += this->delta_time;
-	this->last_frame_time = current_frame_time;
-}
-
-double LoopTimer::get_delta_time() const { return this->delta_time.count(); }
-
-double LoopTimer::get_current_time() const { return this->elapsed_time.count(); }
-
-void LoopTimer::advance_fixed_update() { this->elapsed_fixed_time += this->fixed_delta_time; }
-
-double LoopTimer::get_fixed_delta_time() const { return this->fixed_delta_time.count(); }
-
-void LoopTimer::set_fps(int fps) {
-	this->fps = fps;
-	// target time per frame in seconds
-	this->frame_target_time = std::chrono::duration<double>(1.0) / fps;
-}
-
-int LoopTimer::get_fps() const { return this->fps; }
-
-void LoopTimer::set_game_scale(double value) { this->game_scale = value; }
-
-double LoopTimer::get_game_scale() const { return this->game_scale; }
-void LoopTimer::enforce_frame_rate() {
-	std::chrono::steady_clock::time_point current_frame_time
-		= std::chrono::steady_clock::now();
-	std::chrono::milliseconds frame_duration
-		= std::chrono::duration_cast<std::chrono::milliseconds>(current_frame_time
-																- this->last_frame_time);
-
-	if (frame_duration < this->frame_target_time) {
-		std::chrono::milliseconds delay_time
-			= std::chrono::duration_cast<std::chrono::milliseconds>(this->frame_target_time
-																	- frame_duration);
-		if (delay_time.count() > 0) {
-			SDLContext & ctx = this->mediator.sdl_context;
-			ctx.delay(delay_time.count());
-		}
-	}
-
-	this->last_frame_time = current_frame_time;
-}
-
-double LoopTimer::get_lag() const {
-	return (this->elapsed_time - this->elapsed_fixed_time).count();
-}
diff --git a/src/crepe/api/LoopTimer.h b/src/crepe/api/LoopTimer.h
deleted file mode 100644
index 0a73a4c..0000000
--- a/src/crepe/api/LoopTimer.h
+++ /dev/null
@@ -1,138 +0,0 @@
-#pragma once
-
-#include "manager/Manager.h"
-#include <chrono>
-
-namespace crepe {
-
-class LoopTimer : public Manager {
-public:
-	/**
-	 * \brief Get the current delta time for the current frame.
-	 *
-	 * \return Delta time in seconds since the last frame.
-	 */
-	double get_delta_time() const;
-
-	/**
-	 * \brief Get the current game time.
-	 *
-	 * \note The current game time may vary from real-world elapsed time. It is the cumulative
-	 * sum of each frame's delta time.
-	 *
-	 * \return Elapsed game time in seconds.
-	 */
-	double get_current_time() const;
-
-	/**
-	 * \brief Set the target frames per second (FPS).
-	 *
-	 * \param fps The desired frames rendered per second.
-	 */
-	void set_fps(int fps);
-
-	/**
-	 * \brief Get the current frames per second (FPS).
-	 *
-	 * \return Current FPS.
-	 */
-	int get_fps() const;
-
-	/**
-	 * \brief Get the current game scale.
-	 *
-	 * \return The current game scale, where 0 = paused, 1 = normal speed, and values > 1 speed
-	 * up the game.
-	 */
-	double get_game_scale() const;
-
-	/**
-	 * \brief Set the game scale.
-	 *
-	 * \param game_scale The desired game scale (0 = pause, 1 = normal speed, > 1 = speed up).
-	 */
-	void set_game_scale(double game_scale);
-
-private:
-	friend class LoopManager;
-
-	/**
-	 * \brief Start the loop timer.
-	 *
-	 * Initializes the timer to begin tracking frame times.
-	 */
-	void start();
-
-	/**
-	 * \brief Enforce the frame rate limit.
-	 *
-	 * Ensures that the game loop does not exceed the target FPS by delaying frame updates as
-	 * necessary.
-	 */
-	void enforce_frame_rate();
-
-	/**
-	 * \brief Get the fixed delta time for consistent updates.
-	 *
-	 * Fixed delta time is used for operations that require uniform time steps, such as physics
-	 * calculations.
-	 *
-	 * \return Fixed delta time in seconds.
-	 */
-	double get_fixed_delta_time() const;
-
-	/**
-	 * \brief Get the accumulated lag in the game loop.
-	 *
-	 * Lag represents the difference between the target frame time and the actual frame time,
-	 * useful for managing fixed update intervals.
-	 *
-	 * \return Accumulated lag in seconds.
-	 */
-	double get_lag() const;
-
-	/**
-	 * \brief Construct a new LoopTimer object.
-	 *
-	 * Private constructor for singleton pattern to restrict instantiation outside the class.
-	 */
-	LoopTimer(Mediator & mediator);
-
-	/**
-	 * \brief Update the timer to the current frame.
-	 *
-	 * Calculates and updates the delta time for the current frame and adds it to the cumulative
-	 * game time.
-	 */
-	void update();
-
-	/**
-	 * \brief Advance the game loop by a fixed update interval.
-	 *
-	 * This method progresses the game state by a consistent, fixed time step, allowing for
-	 * stable updates independent of frame rate fluctuations.
-	 */
-	void advance_fixed_update();
-
-private:
-	//! Current frames per second
-	int fps = 50;
-	//! Current game scale
-	double game_scale = 1;
-	//! Maximum delta time in seconds to avoid large jumps
-	std::chrono::duration<double> maximum_delta_time{0.25};
-	//! Delta time for the current frame in seconds
-	std::chrono::duration<double> delta_time{0.0};
-	//! Target time per frame in seconds
-	std::chrono::duration<double> frame_target_time = std::chrono::duration<double>(1.0) / fps;
-	//! Fixed delta time for fixed updates in seconds
-	std::chrono::duration<double> fixed_delta_time = std::chrono::duration<double>(1.0) / 50.0;
-	//! Total elapsed game time in seconds
-	std::chrono::duration<double> elapsed_time{0.0};
-	//! Total elapsed time for fixed updates in seconds
-	std::chrono::duration<double> elapsed_fixed_time{0.0};
-	//! Time of the last frame
-	std::chrono::steady_clock::time_point last_frame_time;
-};
-
-} // namespace crepe
diff --git a/src/crepe/api/Rigidbody.h b/src/crepe/api/Rigidbody.h
index 40c6bf1..b08c8db 100644
--- a/src/crepe/api/Rigidbody.h
+++ b/src/crepe/api/Rigidbody.h
@@ -53,7 +53,7 @@ public:
 	 */
 	struct Data {
 		//! objects mass
-		float mass = 0.0;
+		float mass = 1;
 		/**
 		* \brief Gravity scale factor.
 		*
@@ -79,7 +79,7 @@ public:
 		//! Linear velocity of the object (speed and direction).
 		vec2 linear_velocity;
 		//! Maximum linear velocity of the object. This limits the object's speed.
-		vec2 max_linear_velocity = {INFINITY, INFINITY};
+		float max_linear_velocity = INFINITY;
 		//! Linear velocity coefficient. This scales the object's velocity for adjustment or damping.
 		vec2 linear_velocity_coefficient = {1, 1};
 		//! \}
diff --git a/src/crepe/api/Scene.cpp b/src/crepe/api/Scene.cpp
new file mode 100644
index 0000000..ad729d2
--- /dev/null
+++ b/src/crepe/api/Scene.cpp
@@ -0,0 +1,15 @@
+#include "Scene.h"
+
+using namespace crepe;
+
+SaveManager & Scene::get_save_manager() const { return mediator->save_manager; }
+
+GameObject Scene::new_object(const std::string & name, const std::string & tag,
+							 const vec2 & position, double rotation, double scale) {
+	// Forward the call to ComponentManager's new_object method
+	return mediator->component_manager->new_object(name, tag, position, rotation, scale);
+}
+
+void Scene::set_persistent(const Asset & asset, bool persistent) {
+	mediator->resource_manager->set_persistent(asset, persistent);
+}
diff --git a/src/crepe/api/Scene.h b/src/crepe/api/Scene.h
index ba9bb76..dcca9d4 100644
--- a/src/crepe/api/Scene.h
+++ b/src/crepe/api/Scene.h
@@ -2,13 +2,19 @@
 
 #include <string>
 
+#include "../manager/ComponentManager.h"
 #include "../manager/Mediator.h"
+#include "../manager/ResourceManager.h"
+#include "../util/Log.h"
 #include "../util/OptionalRef.h"
 
+#include "GameObject.h"
+
 namespace crepe {
 
 class SceneManager;
 class ComponentManager;
+class Asset;
 
 /**
  * \brief Represents a Scene
@@ -38,7 +44,7 @@ public:
 	// TODO: Late references should ALWAYS be private! This is currently kept as-is so unit tests
 	// keep passing, but this reference should not be directly accessible by the user!!!
 
-protected:
+private:
 	/**
 	 * \name Late references
 	 *
@@ -53,6 +59,36 @@ protected:
 	//! Mediator reference
 	OptionalRef<Mediator> mediator;
 	//! \}
+
+protected:
+	/**
+	* \brief Retrieve the reference to the SaveManager instance
+	*
+	* \returns A reference to the SaveManager instance held by the Mediator.
+	*/
+	SaveManager & get_save_manager() const;
+
+	//! \copydoc ComponentManager::new_object
+	GameObject new_object(const std::string & name, const std::string & tag = "",
+						  const vec2 & position = {0, 0}, double rotation = 0,
+						  double scale = 1);
+
+	//! \copydoc ResourceManager::set_persistent
+	void set_persistent(const Asset & asset, bool persistent);
+	/**
+	* \name Logging functions
+	* \see Log
+	* \{
+	*/
+	//! \copydoc Log::logf
+	template <class... Args>
+	void logf(const Log::Level & level, std::format_string<Args...> fmt, Args &&... args);
+	//! \copydoc Log::logf
+	template <class... Args>
+	void logf(std::format_string<Args...> fmt, Args &&... args);
+	//! \}
 };
 
 } // namespace crepe
+
+#include "Scene.hpp"
diff --git a/src/crepe/api/Scene.hpp b/src/crepe/api/Scene.hpp
new file mode 100644
index 0000000..14635df
--- /dev/null
+++ b/src/crepe/api/Scene.hpp
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "../util/Log.h"
+
+#include "Scene.h"
+
+namespace crepe {
+
+template <class... Args>
+void Scene::logf(const Log::Level & level, std::format_string<Args...> fmt, Args &&... args) {
+	Log::logf(level, fmt, std::forward<Args>(args)...);
+}
+
+template <class... Args>
+void Scene::logf(std::format_string<Args...> fmt, Args &&... args) {
+	Log::logf(fmt, std::forward<Args>(args)...);
+}
+
+} // namespace crepe
diff --git a/src/crepe/facade/SDLContext.cpp b/src/crepe/facade/SDLContext.cpp
index b95ba6a..68a144e 100644
--- a/src/crepe/facade/SDLContext.cpp
+++ b/src/crepe/facade/SDLContext.cpp
@@ -2,6 +2,7 @@
 #include <SDL2/SDL_blendmode.h>
 #include <SDL2/SDL_image.h>
 #include <SDL2/SDL_keycode.h>
+#include <SDL2/SDL_pixels.h>
 #include <SDL2/SDL_rect.h>
 #include <SDL2/SDL_render.h>
 #include <SDL2/SDL_surface.h>
@@ -232,15 +233,12 @@ SDL_FRect SDLContext::get_dst_rect(const DestinationRectangleData & ctx) const {
 	if (data.size.y == 0 && data.size.x != 0) {
 		size.y = data.size.x / aspect_ratio;
 	}
+	size *= cam_aux_data.render_scale * ctx.img_scale * data.scale_offset;
 
-	const CameraValues & cam = ctx.cam;
-
-	size *= cam.render_scale * ctx.img_scale * data.scale_offset;
-
-	vec2 screen_pos
-		= (ctx.pos + data.position_offset - cam.cam_pos + (cam.zoomed_viewport) / 2)
-			  * cam.render_scale
-		  - size / 2 + cam.bar_size;
+	vec2 screen_pos = (ctx.pos + data.position_offset - cam_aux_data.cam_pos
+					   + (cam_aux_data.zoomed_viewport) / 2)
+						  * cam_aux_data.render_scale
+					  - size / 2 + cam_aux_data.bar_size;
 
 	return SDL_FRect{
 		.x = screen_pos.x,
@@ -269,7 +267,6 @@ void SDLContext::draw(const RenderContext & ctx) {
 	SDL_FRect dstrect = this->get_dst_rect(SDLContext::DestinationRectangleData{
 		.sprite = ctx.sprite,
 		.texture = ctx.texture,
-		.cam = ctx.cam,
 		.pos = ctx.pos,
 		.img_scale = ctx.scale,
 	});
@@ -281,10 +278,9 @@ void SDLContext::draw(const RenderContext & ctx) {
 					  angle, NULL, render_flip);
 }
 
-SDLContext::CameraValues SDLContext::set_camera(const Camera & cam) {
+void SDLContext::update_camera_view(const Camera & cam, const vec2 & new_pos) {
 
 	const Camera::Data & cam_data = cam.data;
-	CameraValues ret_cam;
 	// resize window
 	int w, h;
 	SDL_GetWindowSize(this->game_window.get(), &w, &h);
@@ -292,9 +288,10 @@ SDLContext::CameraValues SDLContext::set_camera(const Camera & cam) {
 		SDL_SetWindowSize(this->game_window.get(), cam.screen.x, cam.screen.y);
 	}
 
-	vec2 & zoomed_viewport = ret_cam.zoomed_viewport;
-	vec2 & bar_size = ret_cam.bar_size;
-	vec2 & render_scale = ret_cam.render_scale;
+	vec2 & zoomed_viewport = this->cam_aux_data.zoomed_viewport;
+	vec2 & bar_size = this->cam_aux_data.bar_size;
+	vec2 & render_scale = this->cam_aux_data.render_scale;
+	this->cam_aux_data.cam_pos = new_pos;
 
 	zoomed_viewport = cam.viewport_size * cam_data.zoom;
 	float screen_aspect = static_cast<float>(cam.screen.x) / cam.screen.y;
@@ -336,12 +333,8 @@ SDLContext::CameraValues SDLContext::set_camera(const Camera & cam) {
 
 	// fill bg color
 	SDL_RenderFillRect(this->game_renderer.get(), &bg);
-
-	return ret_cam;
 }
 
-uint64_t SDLContext::get_ticks() const { return SDL_GetTicks64(); }
-
 std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>>
 SDLContext::texture_from_path(const std::string & path) {
 
@@ -372,12 +365,14 @@ ivec2 SDLContext::get_size(const Texture & ctx) {
 	return size;
 }
 
-void SDLContext::delay(int ms) const { SDL_Delay(ms); }
-
 std::vector<SDLContext::EventData> SDLContext::get_events() {
 	std::vector<SDLContext::EventData> event_list;
 	SDL_Event event;
+	const CameraAuxiliaryData & cam = this->cam_aux_data;
 	while (SDL_PollEvent(&event)) {
+		ivec2 mouse_pos;
+		mouse_pos.x = (event.button.x - cam.bar_size.x) / cam.render_scale.x;
+		mouse_pos.y = (event.button.y - cam.bar_size.y) / cam.render_scale.y;
 		switch (event.type) {
 			case SDL_QUIT:
 				event_list.push_back(EventData{
@@ -401,7 +396,7 @@ std::vector<SDLContext::EventData> SDLContext::get_events() {
 				event_list.push_back(EventData{
 					.event_type = SDLContext::EventType::MOUSEDOWN,
 					.mouse_button = sdl_to_mousebutton(event.button.button),
-					.mouse_position = {event.button.x, event.button.y},
+					.mouse_position = mouse_pos,
 				});
 				break;
 			case SDL_MOUSEBUTTONUP: {
@@ -410,21 +405,21 @@ std::vector<SDLContext::EventData> SDLContext::get_events() {
 				event_list.push_back(EventData{
 					.event_type = SDLContext::EventType::MOUSEUP,
 					.mouse_button = sdl_to_mousebutton(event.button.button),
-					.mouse_position = {event.button.x, event.button.y},
+					.mouse_position = mouse_pos,
 				});
 			} break;
 
 			case SDL_MOUSEMOTION: {
 				event_list.push_back(
 					EventData{.event_type = SDLContext::EventType::MOUSEMOVE,
-							  .mouse_position = {event.motion.x, event.motion.y},
+							  .mouse_position = mouse_pos,
 							  .rel_mouse_move = {event.motion.xrel, event.motion.yrel}});
 			} break;
 
 			case SDL_MOUSEWHEEL: {
 				event_list.push_back(EventData{
 					.event_type = SDLContext::EventType::MOUSEWHEEL,
-					.mouse_position = {event.motion.x, event.motion.y},
+					.mouse_position = mouse_pos,
 					// TODO: why is this needed?
 					.scroll_direction = event.wheel.y < 0 ? -1 : 1,
 					.scroll_delta = event.wheel.preciseY,
diff --git a/src/crepe/facade/SDLContext.h b/src/crepe/facade/SDLContext.h
index 46b779f..bcadf87 100644
--- a/src/crepe/facade/SDLContext.h
+++ b/src/crepe/facade/SDLContext.h
@@ -24,7 +24,6 @@ class Texture;
 class Mediator;
 
 /**
- * \class SDLContext
  * \brief Facade for the SDL library
  *
  * SDLContext is a singleton that handles the SDL window and renderer, provides methods for
@@ -33,7 +32,7 @@ class Mediator;
 class SDLContext {
 public:
 	//! data that the camera component cannot hold
-	struct CameraValues {
+	struct CameraAuxiliaryData {
 
 		//! zoomed in viewport in game_units
 		vec2 zoomed_viewport;
@@ -64,7 +63,6 @@ public:
 	struct RenderContext {
 		const Sprite & sprite;
 		const Texture & texture;
-		const CameraValues & cam;
 		const vec2 & pos;
 		const double & angle;
 		const double & scale;
@@ -193,18 +191,20 @@ public:
 	void present_screen();
 
 	/**
-	 * \brief sets the background of the camera (will be adjusted in future PR)
-	 * \param camera Reference to the Camera object.
-	 * \return camera data the component cannot store
+	 * \brief calculates camera view settings. such as black_bars, zoomed_viewport, scaling and
+	 * adjusting window size.
+	 *
+	 * \note only supports windowed mode.
+	 * \param camera Reference to the current Camera object in the scene.
+	 * \param new_pos new camera position from transform and offset
 	 */
-	CameraValues set_camera(const Camera & camera);
+	void update_camera_view(const Camera & camera, const vec2 & new_pos);
 
 public:
 	//! the data needed to construct a sdl dst rectangle
 	struct DestinationRectangleData {
 		const Sprite & sprite;
 		const Texture & texture;
-		const CameraValues & cam;
 		const vec2 & pos;
 		const double & img_scale;
 	};
@@ -233,6 +233,13 @@ private:
 
 	//! black bars rectangle to draw
 	SDL_FRect black_bars[2] = {};
+
+	/**
+	 * \cam_aux_data extra data that the component cannot hold.
+	 *
+	 * - this is defined in this class because get_events() needs this information aswell
+	 */
+	CameraAuxiliaryData cam_aux_data;
 };
 
 } // namespace crepe
diff --git a/src/crepe/manager/CMakeLists.txt b/src/crepe/manager/CMakeLists.txt
index 480c8ee..f73e165 100644
--- a/src/crepe/manager/CMakeLists.txt
+++ b/src/crepe/manager/CMakeLists.txt
@@ -4,6 +4,7 @@ target_sources(crepe PUBLIC
 	Manager.cpp
 	SaveManager.cpp
 	SceneManager.cpp
+	LoopTimerManager.cpp
 	ResourceManager.cpp
 )
 
@@ -17,6 +18,7 @@ target_sources(crepe PUBLIC FILE_SET HEADERS FILES
 	SaveManager.h
 	SceneManager.h
 	SceneManager.hpp
+	LoopTimerManager.h
 	ResourceManager.h
 	ResourceManager.hpp
 )
diff --git a/src/crepe/manager/EventManager.cpp b/src/crepe/manager/EventManager.cpp
index 20f0dd3..6aa49ee 100644
--- a/src/crepe/manager/EventManager.cpp
+++ b/src/crepe/manager/EventManager.cpp
@@ -3,11 +3,9 @@
 using namespace crepe;
 using namespace std;
 
-EventManager & EventManager::get_instance() {
-	static EventManager instance;
-	return instance;
+EventManager::EventManager(Mediator & mediator) : Manager(mediator) {
+	this->mediator.event_manager = *this;
 }
-
 void EventManager::dispatch_events() {
 	for (auto & event : this->events_queue) {
 		this->handle_event(event.type, event.channel, *event.event.get());
diff --git a/src/crepe/manager/EventManager.h b/src/crepe/manager/EventManager.h
index ba5e98b..639e37f 100644
--- a/src/crepe/manager/EventManager.h
+++ b/src/crepe/manager/EventManager.h
@@ -8,6 +8,8 @@
 #include "../api/Event.h"
 #include "../api/EventHandler.h"
 
+#include "Manager.h"
+
 namespace crepe {
 
 //! Event listener unique ID
@@ -22,27 +24,19 @@ typedef size_t subscription_t;
 typedef size_t event_channel_t;
 
 /**
- * \class EventManager
  * \brief Manages event subscriptions, triggers, and queues, enabling decoupled event handling.
  *
  * The `EventManager` acts as a centralized event system. It allows for registering callbacks
  * for specific event types, triggering events synchronously, queueing events for later
  * processing, and managing subscriptions via unique identifiers.
  */
-class EventManager {
+class EventManager : public Manager {
 public:
 	static constexpr const event_channel_t CHANNEL_ALL = -1;
-
 	/**
-	 * \brief Get the singleton instance of the EventManager.
-	 *
-	 * This method returns the unique instance of the EventManager, creating it if it
-	 * doesn't already exist. Ensures only one instance is active in the program.
-	 *
-	 * \return Reference to the singleton instance of the EventManager.
+	 * \param mediator A reference to a Mediator object used for transfering managers.
 	 */
-	static EventManager & get_instance();
-
+	EventManager(Mediator & mediator);
 	/**
 	 * \brief Subscribe to a specific event type.
 	 *
@@ -108,13 +102,6 @@ public:
 
 private:
 	/**
-	 * \brief Default constructor for the EventManager.
-	 *
-	 * Constructor is private to enforce the singleton pattern.
-	 */
-	EventManager() = default;
-
-	/**
 	 * \struct QueueEntry
 	 * \brief Represents an entry in the event queue.
 	 */
diff --git a/src/crepe/manager/LoopTimerManager.cpp b/src/crepe/manager/LoopTimerManager.cpp
new file mode 100644
index 0000000..a6e4788
--- /dev/null
+++ b/src/crepe/manager/LoopTimerManager.cpp
@@ -0,0 +1,91 @@
+#include <chrono>
+#include <thread>
+
+#include "../util/Log.h"
+
+#include "LoopTimerManager.h"
+
+using namespace crepe;
+using namespace std::chrono;
+using namespace std::chrono_literals;
+
+LoopTimerManager::LoopTimerManager(Mediator & mediator) : Manager(mediator) {
+	this->mediator.loop_timer = *this;
+	dbg_trace();
+}
+
+void LoopTimerManager::start() {
+	this->last_frame_time = std::chrono::steady_clock::now();
+
+	this->elapsed_time = elapsed_time_t{0};
+	this->elapsed_fixed_time = elapsed_time_t{0};
+	this->delta_time = duration_t{0};
+}
+
+void LoopTimerManager::update() {
+	time_point_t current_frame_time = std::chrono::steady_clock::now();
+	// Convert to duration in seconds for delta time
+	this->delta_time = current_frame_time - last_frame_time;
+
+	if (this->delta_time > this->maximum_delta_time) {
+		this->delta_time = this->maximum_delta_time;
+	}
+	if (this->delta_time > 0s) {
+		this->actual_fps = static_cast<unsigned>(1.0 / this->delta_time.count());
+	} else {
+		this->actual_fps = 0;
+	}
+	this->elapsed_time += duration_cast<elapsed_time_t>(this->delta_time);
+	this->last_frame_time = current_frame_time;
+}
+
+duration_t LoopTimerManager::get_delta_time() const {
+	return this->delta_time * this->time_scale;
+}
+
+elapsed_time_t LoopTimerManager::get_elapsed_time() const { return this->elapsed_time; }
+
+void LoopTimerManager::advance_fixed_elapsed_time() {
+	this->elapsed_fixed_time
+		+= std::chrono::duration_cast<elapsed_time_t>(this->fixed_delta_time);
+}
+
+void LoopTimerManager::set_target_framerate(unsigned fps) {
+	this->target_fps = fps;
+	//check if fps is lower or equals 0
+	if (fps <= 0) return;
+	// target time per frame in seconds
+	this->frame_target_time = duration_t(1s) / this->target_fps;
+}
+
+unsigned LoopTimerManager::get_fps() const { return this->actual_fps; }
+
+void LoopTimerManager::set_time_scale(double value) { this->time_scale = value; }
+
+float LoopTimerManager::get_time_scale() const { return this->time_scale; }
+
+void LoopTimerManager::enforce_frame_rate() {
+	time_point_t current_frame_time = std::chrono::steady_clock::now();
+	duration_t frame_duration = current_frame_time - this->last_frame_time;
+	// Check if frame duration is less than the target frame time
+	if (frame_duration < this->frame_target_time) {
+		duration_t delay_time = this->frame_target_time - frame_duration;
+		if (delay_time > 0s) {
+			std::this_thread::sleep_for(delay_time);
+		}
+	}
+}
+
+duration_t LoopTimerManager::get_lag() const {
+	return this->elapsed_time - this->elapsed_fixed_time;
+}
+
+duration_t LoopTimerManager::get_scaled_fixed_delta_time() const {
+	return this->fixed_delta_time * this->time_scale;
+}
+
+void LoopTimerManager::set_fixed_delta_time(float seconds) {
+	this->fixed_delta_time = duration_t(seconds);
+}
+
+duration_t LoopTimerManager::get_fixed_delta_time() const { return this->fixed_delta_time; }
diff --git a/src/crepe/manager/LoopTimerManager.h b/src/crepe/manager/LoopTimerManager.h
new file mode 100644
index 0000000..76b02d3
--- /dev/null
+++ b/src/crepe/manager/LoopTimerManager.h
@@ -0,0 +1,175 @@
+#pragma once
+
+#include <chrono>
+
+#include "Manager.h"
+
+namespace crepe {
+
+typedef std::chrono::duration<float> duration_t;
+typedef std::chrono::duration<unsigned long long, std::micro> elapsed_time_t;
+
+/**
+ * \brief Manages timing and frame rate for the game loop.
+ * 
+ * The LoopTimerManager class is responsible for calculating and managing timing functions 
+ * such as delta time, frames per second (FPS), fixed time steps, and time scaling. It ensures 
+ * consistent frame updates and supports game loop operations, such as handling fixed updates 
+ * for physics and other time-sensitive operations.
+ */
+class LoopTimerManager : public Manager {
+public:
+	/**
+	 * \param mediator A reference to a Mediator object used for transfering managers.
+	 */
+	LoopTimerManager(Mediator & mediator);
+	/**
+	 * \brief Get the current delta time for the current frame.
+	 *	
+	 * This value represents the estimated frame duration of the current frame.
+	 * This value can be used in the frame_update to convert pixel based values to time based values.
+	 * 
+	 * \return Delta time in seconds since the last frame.
+	 */
+	duration_t get_delta_time() const;
+
+	/**
+	 * \brief Get the current elapsed time (total time passed )
+	 *
+	 * \note The current game time may vary from real-world elapsed time. It is the cumulative
+	 * sum of each frame's delta time.
+	 *
+	 * \return Elapsed game time in seconds.
+	 */
+	elapsed_time_t get_elapsed_time() const;
+
+	/**
+	 * \brief Set the target frames per second (FPS).
+	 *
+	 * \param fps The desired frames rendered per second.
+	 */
+	void set_target_framerate(unsigned fps);
+
+	/**
+	 * \brief Get the current frames per second (FPS).
+	 *
+	 * \return Current FPS.
+	 */
+	unsigned int get_fps() const;
+
+	/**
+	 * \brief Get the current time scale.
+	 *
+	 * \return The current time scale, where (0 = pause, < 1 = slow down, 1 = normal speed, > 1 = speed up).
+	 * up the game.
+	 */
+	float get_time_scale() const;
+
+	/**
+	 * \brief Set the time scale.
+	 *
+	 * time_scale is a value that changes the delta time that can be retrieved using get_delta_time function. 
+	 * 
+	 * \param time_scale The desired time scale (0 = pause, < 1 = slow down, 1 = normal speed, > 1 = speed up).
+	 */
+	void set_time_scale(double time_scale);
+
+	/**
+	 * \brief Get the fixed delta time in seconds without scaling by the time scale.
+	 *
+	 * This value is used in the LoopManager to determine how many times 
+	 * the fixed_update should be called within a given interval.
+	 *
+	 * \return The unscaled fixed delta time in seconds.
+	 */
+	duration_t get_fixed_delta_time() const;
+
+	/**
+	 * \brief Set the fixed_delta_time in seconds.
+	 * 
+	 * \param seconds fixed_delta_time in seconds.
+	 * 
+	 * The fixed_delta_time value is used to determine how many times per second the fixed_update and process_input functions are called.
+	 * 
+	 */
+	void set_fixed_delta_time(float seconds);
+
+	/**
+	 * \brief Retrieves the scaled fixed delta time in seconds.
+	 *
+	 * The scaled fixed delta time is the timing value used within the `fixed_update` function. 
+	 * It is adjusted by the time_scale to account for any changes in the simulation's 
+	 * speed.
+	 *
+	 * \return The fixed delta time, scaled by the current time scale, in seconds.
+	 */
+	duration_t get_scaled_fixed_delta_time() const;
+
+private:
+	//! Friend relation to use start,enforce_frame_rate,get_lag,update,advance_fixed_update.
+	friend class LoopManager;
+	/**
+	 * \brief Start the loop timer.
+	 *
+	 * Initializes the timer to begin tracking frame times.
+	 */
+	void start();
+	/**
+	 * \brief Enforce the frame rate limit.
+	 *
+	 * Ensures that the game loop does not exceed the target FPS by delaying frame updates as
+	 * necessary.
+	 */
+	void enforce_frame_rate();
+	/**
+	 * \brief Get the accumulated lag in the game loop.
+	 *
+	 * Lag represents the difference between the target frame time and the actual frame time,
+	 * useful for managing fixed update intervals.
+	 *
+	 * \return Accumulated lag in seconds.
+	 */
+	duration_t get_lag() const;
+
+	/**
+	 * \brief Update the timer to the current frame.
+	 *
+	 * Calculates and updates the delta time for the current frame and adds it to the cumulative
+	 * game time.
+	 */
+	void update();
+
+	/**
+	 * \brief Progress the elapsed fixed time by the fixed delta time interval.
+	 *
+	 * This method advances the game's fixed update loop by adding the fixed_delta_time 
+	 * to elapsed_fixed_time, ensuring the fixed update catches up with the elapsed time.
+	 */
+	void advance_fixed_elapsed_time();
+
+private:
+	//! Target frames per second.
+	unsigned int target_fps = 60;
+	//! Actual frames per second.
+	unsigned int actual_fps = 0;
+	//! Time scale for speeding up or slowing down the game (0 = pause, < 1 = slow down, 1 = normal speed, > 1 = speed up).
+	float time_scale = 1;
+	//! Maximum delta time in seconds to avoid large jumps.
+	duration_t maximum_delta_time{0.25};
+	//! Delta time for the current frame in seconds.
+	duration_t delta_time{0.0};
+	//! Target time per frame in seconds
+	duration_t frame_target_time{1.0 / target_fps};
+	//! Fixed delta time for fixed updates in seconds.
+	duration_t fixed_delta_time{1.0 / 50.0};
+	//! Total elapsed game time in microseconds.
+	elapsed_time_t elapsed_time{0};
+	//! Total elapsed time for fixed updates in microseconds.
+	elapsed_time_t elapsed_fixed_time{0};
+
+	typedef std::chrono::steady_clock::time_point time_point_t;
+	//! Time of the last frame.
+	time_point_t last_frame_time;
+};
+
+} // namespace crepe
diff --git a/src/crepe/manager/Mediator.h b/src/crepe/manager/Mediator.h
index 628154a..a336410 100644
--- a/src/crepe/manager/Mediator.h
+++ b/src/crepe/manager/Mediator.h
@@ -2,17 +2,15 @@
 
 #include "../util/OptionalRef.h"
 
-// TODO: remove these singletons:
-#include "EventManager.h"
-
 namespace crepe {
 
 class ComponentManager;
 class SceneManager;
+class EventManager;
+class LoopTimerManager;
 class SaveManager;
 class ResourceManager;
 class SDLContext;
-class LoopTimer;
 
 /**
  * Struct to pass references to classes that would otherwise need to be singletons down to
@@ -30,10 +28,10 @@ struct Mediator {
 	OptionalRef<SDLContext> sdl_context;
 	OptionalRef<ComponentManager> component_manager;
 	OptionalRef<SceneManager> scene_manager;
+	OptionalRef<EventManager> event_manager;
+	OptionalRef<LoopTimerManager> loop_timer;
 	OptionalRef<SaveManager> save_manager;
-	OptionalRef<EventManager> event_manager = EventManager::get_instance();
 	OptionalRef<ResourceManager> resource_manager;
-	OptionalRef<LoopTimer> timer;
 };
 
 } // namespace crepe
diff --git a/src/crepe/manager/SceneManager.cpp b/src/crepe/manager/SceneManager.cpp
index 50a9fbb..d4ca90b 100644
--- a/src/crepe/manager/SceneManager.cpp
+++ b/src/crepe/manager/SceneManager.cpp
@@ -32,4 +32,7 @@ void SceneManager::load_next_scene() {
 
 	// Load the new scene
 	scene->load_scene();
+
+	//clear the next scene
+	next_scene.clear();
 }
diff --git a/src/crepe/system/AISystem.cpp b/src/crepe/system/AISystem.cpp
index 7f04432..680dbb8 100644
--- a/src/crepe/system/AISystem.cpp
+++ b/src/crepe/system/AISystem.cpp
@@ -1,22 +1,22 @@
 #include <algorithm>
 #include <cmath>
 
-#include "api/LoopTimer.h"
 #include "manager/ComponentManager.h"
+#include "manager/LoopTimerManager.h"
 #include "manager/Mediator.h"
 
 #include "AISystem.h"
 
 using namespace crepe;
+using namespace std::chrono;
 
 void AISystem::update() {
 	const Mediator & mediator = this->mediator;
 	ComponentManager & mgr = mediator.component_manager;
-	LoopTimer & timer = mediator.timer;
+	LoopTimerManager & loop_timer = mediator.loop_timer;
 	RefVector<AI> ai_components = mgr.get_components_by_type<AI>();
 
-	//TODO: Use fixed loop dt (this is not available at master at the moment)
-	double dt = timer.get_delta_time();
+	float dt = loop_timer.get_scaled_fixed_delta_time().count();
 
 	// Loop through all AI components
 	for (AI & ai : ai_components) {
@@ -144,7 +144,7 @@ vec2 AISystem::arrive(const AI & ai, const Rigidbody & rigidbody,
 		}
 
 		float speed = distance / ai.arrive_deceleration;
-		speed = std::min(speed, rigidbody.data.max_linear_velocity.length());
+		speed = std::min(speed, rigidbody.data.max_linear_velocity);
 		vec2 desired_velocity = to_target * (speed / distance);
 
 		return desired_velocity - rigidbody.data.linear_velocity;
diff --git a/src/crepe/system/AnimatorSystem.cpp b/src/crepe/system/AnimatorSystem.cpp
index d61ba35..107b25d 100644
--- a/src/crepe/system/AnimatorSystem.cpp
+++ b/src/crepe/system/AnimatorSystem.cpp
@@ -2,21 +2,24 @@
 
 #include "../api/Animator.h"
 #include "../manager/ComponentManager.h"
-#include "api/LoopTimer.h"
+#include "../manager/LoopTimerManager.h"
+#include <chrono>
 
 #include "AnimatorSystem.h"
 
 using namespace crepe;
+using namespace std::chrono;
 
 void AnimatorSystem::update() {
 	ComponentManager & mgr = this->mediator.component_manager;
-	LoopTimer & timer = this->mediator.timer;
+	LoopTimerManager & timer = this->mediator.loop_timer;
 	RefVector<Animator> animations = mgr.get_components_by_type<Animator>();
 
-	double elapsed_time = timer.get_current_time();
+	float elapsed_time = duration_cast<duration<float>>(timer.get_elapsed_time()).count();
 
 	for (Animator & a : animations) {
 		if (!a.active) continue;
+		if (a.data.fps == 0) continue;
 
 		Animator::Data & ctx = a.data;
 		float frame_duration = 1.0f / ctx.fps;
diff --git a/src/crepe/system/CollisionSystem.cpp b/src/crepe/system/CollisionSystem.cpp
index 44a0431..496224e 100644
--- a/src/crepe/system/CollisionSystem.cpp
+++ b/src/crepe/system/CollisionSystem.cpp
@@ -192,13 +192,15 @@ CollisionSystem::collision_handler(CollisionInternal & data1, CollisionInternal
 		resolution_direction = Direction::BOTH;
 	} else if (resolution.x != 0) {
 		resolution_direction = Direction::X_DIRECTION;
-		if (data1.rigidbody.data.linear_velocity.y != 0)
-			resolution.y = data1.rigidbody.data.linear_velocity.y
+		//checks if the other velocity has a value and if this object moved
+		if (data1.rigidbody.data.linear_velocity.x != 0 && data1.rigidbody.data.linear_velocity.y != 0)
+			resolution.y = -data1.rigidbody.data.linear_velocity.y
 						   * (resolution.x / data1.rigidbody.data.linear_velocity.x);
 	} else if (resolution.y != 0) {
 		resolution_direction = Direction::Y_DIRECTION;
-		if (data1.rigidbody.data.linear_velocity.x != 0)
-			resolution.x = data1.rigidbody.data.linear_velocity.x
+		//checks if the other velocity has a value and if this object moved
+		if (data1.rigidbody.data.linear_velocity.x != 0 && data1.rigidbody.data.linear_velocity.y != 0)
+			resolution.x = -data1.rigidbody.data.linear_velocity.x
 						   * (resolution.y / data1.rigidbody.data.linear_velocity.y);
 	}
 
@@ -314,28 +316,46 @@ void CollisionSystem::static_collision_handler(CollisionInfo & info) {
 	// Move object back using calculate move back value
 	info.this_transform.position += info.resolution;
 
-	// If bounce is enabled mirror velocity
-	if (info.this_rigidbody.data.elastisity_coefficient > 0) {
-		if (info.resolution_direction == Direction::BOTH) {
-			info.this_rigidbody.data.linear_velocity.y
-				= -info.this_rigidbody.data.linear_velocity.y
-				  * info.this_rigidbody.data.elastisity_coefficient;
-			info.this_rigidbody.data.linear_velocity.x
-				= -info.this_rigidbody.data.linear_velocity.x
-				  * info.this_rigidbody.data.elastisity_coefficient;
-		} else if (info.resolution_direction == Direction::Y_DIRECTION) {
-			info.this_rigidbody.data.linear_velocity.y
-				= -info.this_rigidbody.data.linear_velocity.y
-				  * info.this_rigidbody.data.elastisity_coefficient;
-		} else if (info.resolution_direction == Direction::X_DIRECTION) {
-			info.this_rigidbody.data.linear_velocity.x
-				= -info.this_rigidbody.data.linear_velocity.x
-				  * info.this_rigidbody.data.elastisity_coefficient;
-		}
-	}
-	// Stop movement if bounce is disabled
-	else {
-		info.this_rigidbody.data.linear_velocity = {0, 0};
+	switch (info.resolution_direction) {
+		case Direction::BOTH:
+			//bounce
+			if (info.this_rigidbody.data.elastisity_coefficient > 0) {
+				info.this_rigidbody.data.linear_velocity = -info.this_rigidbody.data.linear_velocity * info.this_rigidbody.data.elastisity_coefficient;
+			}
+			//stop movement
+			else {
+				info.this_rigidbody.data.linear_velocity = {0, 0};
+			}
+			break;
+		case Direction::Y_DIRECTION:
+			// Bounce
+			if (info.this_rigidbody.data.elastisity_coefficient > 0) {
+				info.this_rigidbody.data.linear_velocity.y
+					= -info.this_rigidbody.data.linear_velocity.y
+					  * info.this_rigidbody.data.elastisity_coefficient;
+			}
+			// Stop movement
+			else {
+				info.this_rigidbody.data.linear_velocity.y = 0;
+				info.this_transform.position.x -= info.resolution.x;
+			}
+			break;
+		case Direction::X_DIRECTION:
+			// Bounce
+			if (info.this_rigidbody.data.elastisity_coefficient > 0) {
+				info.this_rigidbody.data.linear_velocity.x
+					= -info.this_rigidbody.data.linear_velocity.x
+					  * info.this_rigidbody.data.elastisity_coefficient;
+			}
+			// Stop movement
+			else {
+				info.this_rigidbody.data.linear_velocity.x = 0;
+				info.this_transform.position.y -= info.resolution.y;
+			}
+			break;
+		case Direction::NONE:
+			// Not possible
+			break;
 	}
 }
 
diff --git a/src/crepe/system/PhysicsSystem.cpp b/src/crepe/system/PhysicsSystem.cpp
index ebf4439..3b3b8ab 100644
--- a/src/crepe/system/PhysicsSystem.cpp
+++ b/src/crepe/system/PhysicsSystem.cpp
@@ -5,88 +5,95 @@
 #include "../api/Transform.h"
 #include "../api/Vector2.h"
 #include "../manager/ComponentManager.h"
+#include "../manager/LoopTimerManager.h"
+#include "../manager/Mediator.h"
 
 #include "PhysicsSystem.h"
 
 using namespace crepe;
 
 void PhysicsSystem::update() {
-	ComponentManager & mgr = this->mediator.component_manager;
+
+	const Mediator & mediator = this->mediator;
+	ComponentManager & mgr = mediator.component_manager;
+	LoopTimerManager & loop_timer = mediator.loop_timer;
 	RefVector<Rigidbody> rigidbodies = mgr.get_components_by_type<Rigidbody>();
-	RefVector<Transform> transforms = mgr.get_components_by_type<Transform>();
+	float dt = loop_timer.get_scaled_fixed_delta_time().count();
 
-	double gravity = Config::get_instance().physics.gravity;
+	float gravity = Config::get_instance().physics.gravity;
 	for (Rigidbody & rigidbody : rigidbodies) {
 		if (!rigidbody.active) continue;
+		Transform & transform
+			= mgr.get_components_by_id<Transform>(rigidbody.game_object_id).front().get();
 
 		switch (rigidbody.data.body_type) {
 			case Rigidbody::BodyType::DYNAMIC:
-				for (Transform & transform : transforms) {
-					if (transform.game_object_id == rigidbody.game_object_id) {
+				if (transform.game_object_id == rigidbody.game_object_id) {
+					// Add gravity
 
-						// Add gravity
-						if (rigidbody.data.gravity_scale > 0) {
-							rigidbody.data.linear_velocity.y
-								+= (rigidbody.data.mass * rigidbody.data.gravity_scale
-									* gravity);
-						}
-						// Add damping
-						if (rigidbody.data.angular_velocity_coefficient > 0) {
-							rigidbody.data.angular_velocity
-								*= rigidbody.data.angular_velocity_coefficient;
-						}
-						if (rigidbody.data.linear_velocity_coefficient.x > 0
-							&& rigidbody.data.linear_velocity_coefficient.y > 0) {
-							rigidbody.data.linear_velocity
-								*= rigidbody.data.linear_velocity_coefficient;
-						}
+					if (rigidbody.data.mass <= 0) {
+						throw std::runtime_error("Mass must be greater than 0");
+					}
 
-						// Max velocity check
-						if (rigidbody.data.angular_velocity
-							> rigidbody.data.max_angular_velocity) {
-							rigidbody.data.angular_velocity
-								= rigidbody.data.max_angular_velocity;
-						} else if (rigidbody.data.angular_velocity
-								   < -rigidbody.data.max_angular_velocity) {
-							rigidbody.data.angular_velocity
-								= -rigidbody.data.max_angular_velocity;
-						}
+					if (gravity <= 0) {
+						throw std::runtime_error("Config Gravity must be greater than 0");
+					}
 
-						if (rigidbody.data.linear_velocity.x
-							> rigidbody.data.max_linear_velocity.x) {
-							rigidbody.data.linear_velocity.x
-								= rigidbody.data.max_linear_velocity.x;
-						} else if (rigidbody.data.linear_velocity.x
-								   < -rigidbody.data.max_linear_velocity.x) {
-							rigidbody.data.linear_velocity.x
-								= -rigidbody.data.max_linear_velocity.x;
-						}
+					if (rigidbody.data.gravity_scale > 0 && !rigidbody.data.constraints.y) {
+						rigidbody.data.linear_velocity.y
+							+= (rigidbody.data.mass * rigidbody.data.gravity_scale * gravity
+								* dt);
+					}
+					// Add coefficient rotation
+					if (rigidbody.data.angular_velocity_coefficient > 0) {
+						rigidbody.data.angular_velocity
+							*= std::pow(rigidbody.data.angular_velocity_coefficient, dt);
+					}
 
-						if (rigidbody.data.linear_velocity.y
-							> rigidbody.data.max_linear_velocity.y) {
-							rigidbody.data.linear_velocity.y
-								= rigidbody.data.max_linear_velocity.y;
-						} else if (rigidbody.data.linear_velocity.y
-								   < -rigidbody.data.max_linear_velocity.y) {
-							rigidbody.data.linear_velocity.y
-								= -rigidbody.data.max_linear_velocity.y;
-						}
+					// Add coefficient movement horizontal
+					if (rigidbody.data.linear_velocity_coefficient.x > 0
+						&& !rigidbody.data.constraints.x) {
+						rigidbody.data.linear_velocity.x
+							*= std::pow(rigidbody.data.linear_velocity_coefficient.x, dt);
+					}
 
-						// Move object
-						if (!rigidbody.data.constraints.rotation) {
-							transform.rotation += rigidbody.data.angular_velocity;
-							transform.rotation = std::fmod(transform.rotation, 360.0);
-							if (transform.rotation < 0) {
-								transform.rotation += 360.0;
-							}
-						}
-						if (!rigidbody.data.constraints.x) {
-							transform.position.x += rigidbody.data.linear_velocity.x;
-						}
-						if (!rigidbody.data.constraints.y) {
-							transform.position.y += rigidbody.data.linear_velocity.y;
+					// Add coefficient movement horizontal
+					if (rigidbody.data.linear_velocity_coefficient.y > 0
+						&& !rigidbody.data.constraints.y) {
+						rigidbody.data.linear_velocity.y
+							*= std::pow(rigidbody.data.linear_velocity_coefficient.y, dt);
+					}
+
+					// Max velocity check
+					if (rigidbody.data.angular_velocity
+						> rigidbody.data.max_angular_velocity) {
+						rigidbody.data.angular_velocity = rigidbody.data.max_angular_velocity;
+					} else if (rigidbody.data.angular_velocity
+							   < -rigidbody.data.max_angular_velocity) {
+						rigidbody.data.angular_velocity = -rigidbody.data.max_angular_velocity;
+					}
+
+					// Set max velocity to maximum length
+					if (rigidbody.data.linear_velocity.length()
+						> rigidbody.data.max_linear_velocity) {
+						rigidbody.data.linear_velocity.normalize();
+						rigidbody.data.linear_velocity *= rigidbody.data.max_linear_velocity;
+					}
+
+					// Move object
+					if (!rigidbody.data.constraints.rotation) {
+						transform.rotation += rigidbody.data.angular_velocity * dt;
+						transform.rotation = std::fmod(transform.rotation, 360.0);
+						if (transform.rotation < 0) {
+							transform.rotation += 360.0;
 						}
 					}
+					if (!rigidbody.data.constraints.x) {
+						transform.position.x += rigidbody.data.linear_velocity.x * dt;
+					}
+					if (!rigidbody.data.constraints.y) {
+						transform.position.y += rigidbody.data.linear_velocity.y * dt;
+					}
 				}
 				break;
 			case Rigidbody::BodyType::KINEMATIC:
diff --git a/src/crepe/system/RenderSystem.cpp b/src/crepe/system/RenderSystem.cpp
index 51340fb..afd9548 100644
--- a/src/crepe/system/RenderSystem.cpp
+++ b/src/crepe/system/RenderSystem.cpp
@@ -15,6 +15,7 @@
 #include "../manager/ResourceManager.h"
 
 #include "RenderSystem.h"
+#include "types.h"
 
 using namespace crepe;
 using namespace std;
@@ -29,7 +30,7 @@ void RenderSystem::present_screen() {
 	ctx.present_screen();
 }
 
-SDLContext::CameraValues RenderSystem::update_camera() {
+void RenderSystem::update_camera() {
 	ComponentManager & mgr = this->mediator.component_manager;
 	SDLContext & ctx = this->mediator.sdl_context;
 	RefVector<Camera> cameras = mgr.get_components_by_type<Camera>();
@@ -40,9 +41,9 @@ SDLContext::CameraValues RenderSystem::update_camera() {
 		if (!cam.active) continue;
 		const Transform & transform
 			= mgr.get_components_by_id<Transform>(cam.game_object_id).front().get();
-		SDLContext::CameraValues cam_val = ctx.set_camera(cam);
-		cam_val.cam_pos = transform.position + cam.data.postion_offset;
-		return cam_val;
+		vec2 new_camera_pos = transform.position + cam.data.postion_offset;
+		ctx.update_camera_view(cam, new_camera_pos);
+		return;
 	}
 	throw std::runtime_error("No active cameras in current scene");
 }
@@ -69,8 +70,7 @@ void RenderSystem::update() {
 	this->present_screen();
 }
 
-bool RenderSystem::render_particle(const Sprite & sprite, const SDLContext::CameraValues & cam,
-								   const double & scale) {
+bool RenderSystem::render_particle(const Sprite & sprite, const double & scale) {
 
 	ComponentManager & mgr = this->mediator.component_manager;
 	SDLContext & ctx = this->mediator.sdl_context;
@@ -93,7 +93,6 @@ bool RenderSystem::render_particle(const Sprite & sprite, const SDLContext::Came
 			ctx.draw(SDLContext::RenderContext{
 				.sprite = sprite,
 				.texture = res,
-				.cam = cam,
 				.pos = p.position,
 				.angle = p.angle,
 				.scale = scale,
@@ -102,8 +101,7 @@ bool RenderSystem::render_particle(const Sprite & sprite, const SDLContext::Came
 	}
 	return rendering_particles;
 }
-void RenderSystem::render_normal(const Sprite & sprite, const SDLContext::CameraValues & cam,
-								 const Transform & tm) {
+void RenderSystem::render_normal(const Sprite & sprite, const Transform & tm) {
 	SDLContext & ctx = this->mediator.sdl_context;
 	ResourceManager & resource_manager = this->mediator.resource_manager;
 	const Texture & res = resource_manager.get<Texture>(sprite.source);
@@ -111,7 +109,6 @@ void RenderSystem::render_normal(const Sprite & sprite, const SDLContext::Camera
 	ctx.draw(SDLContext::RenderContext{
 		.sprite = sprite,
 		.texture = res,
-		.cam = cam,
 		.pos = tm.position,
 		.angle = tm.rotation,
 		.scale = tm.scale,
@@ -120,7 +117,7 @@ void RenderSystem::render_normal(const Sprite & sprite, const SDLContext::Camera
 
 void RenderSystem::render() {
 	ComponentManager & mgr = this->mediator.component_manager;
-	const SDLContext::CameraValues & cam = this->update_camera();
+	this->update_camera();
 
 	RefVector<Sprite> sprites = mgr.get_components_by_type<Sprite>();
 	RefVector<Sprite> sorted_sprites = this->sort(sprites);
@@ -130,10 +127,10 @@ void RenderSystem::render() {
 		const Transform & transform
 			= mgr.get_components_by_id<Transform>(sprite.game_object_id).front().get();
 
-		bool rendered_particles = this->render_particle(sprite, cam, transform.scale);
+		bool rendered_particles = this->render_particle(sprite, transform.scale);
 
 		if (rendered_particles) continue;
 
-		this->render_normal(sprite, cam, transform);
+		this->render_normal(sprite, transform);
 	}
 }
diff --git a/src/crepe/system/RenderSystem.h b/src/crepe/system/RenderSystem.h
index e270a6b..fc7b46e 100644
--- a/src/crepe/system/RenderSystem.h
+++ b/src/crepe/system/RenderSystem.h
@@ -2,8 +2,6 @@
 
 #include <cmath>
 
-#include "facade/SDLContext.h"
-
 #include "System.h"
 #include "types.h"
 
@@ -14,7 +12,6 @@ class Sprite;
 class Transform;
 
 /**
- * \class RenderSystem
  * \brief Manages rendering operations for all game objects.
  *
  * RenderSystem is responsible for rendering, clearing and presenting the screen, and
@@ -37,7 +34,7 @@ private:
 	void present_screen();
 
 	//! Updates the active camera used for rendering.
-	SDLContext::CameraValues update_camera();
+	void update_camera();
 
 	//! Renders the whole screen
 	void render();
@@ -52,8 +49,7 @@ private:
 	 *  constructor is now protected i cannot make tmp inside
 	 * \return true if particles have been rendered
 	 */
-	bool render_particle(const Sprite & sprite, const SDLContext::CameraValues & cam,
-						 const double & scale);
+	bool render_particle(const Sprite & sprite, const double & scale);
 
 	/**
 	 * \brief renders a sprite with a Transform component on the screen
@@ -61,8 +57,7 @@ private:
 	 * \param sprite  the sprite component that holds all the data
 	 * \param tm the Transform component that holds the position,rotation and scale
 	 */
-	void render_normal(const Sprite & sprite, const SDLContext::CameraValues & cam,
-					   const Transform & tm);
+	void render_normal(const Sprite & sprite, const Transform & tm);
 
 	/**
 	 * \brief sort a vector sprite objects with
diff --git a/src/example/AITest.cpp b/src/example/AITest.cpp
index f4efc9f..93ba500 100644
--- a/src/example/AITest.cpp
+++ b/src/example/AITest.cpp
@@ -8,7 +8,6 @@
 #include <crepe/api/Scene.h>
 #include <crepe/api/Script.h>
 #include <crepe/api/Sprite.h>
-#include <crepe/api/Texture.h>
 #include <crepe/manager/Mediator.h>
 #include <crepe/types.h>
 
@@ -47,14 +46,19 @@ public:
 		GameObject game_object1 = mgr.new_object("", "", vec2{0, 0}, 0, 1);
 		GameObject game_object2 = mgr.new_object("", "", vec2{0, 0}, 0, 1);
 
-		Texture img = Texture("asset/texture/test_ap43.png");
-		game_object1.add_component<Sprite>(img, Sprite::Data{
-													.color = Color::MAGENTA,
-													.flip = Sprite::FlipSettings{false, false},
-													.sorting_in_layer = 1,
-													.order_in_layer = 1,
-													.size = {0, 195},
-												});
+		Asset img{"asset/texture/test_ap43.png"};
+
+		Sprite & test_sprite = game_object1.add_component<Sprite>(
+			img, Sprite::Data{
+					 .color = Color::MAGENTA,
+					 .flip = Sprite::FlipSettings{false, false},
+					 .sorting_in_layer = 2,
+					 .order_in_layer = 2,
+					 .size = {0, 100},
+					 .angle_offset = 0,
+					 .position_offset = {0, 0},
+				 });
+
 		AI & ai = game_object1.add_component<AI>(3000);
 		// ai.arrive_on();
 		// ai.flee_on();
@@ -63,7 +67,7 @@ public:
 		ai.make_oval_path(1000, 500, {0, 500}, 4.7124, false);
 		game_object1.add_component<Rigidbody>(Rigidbody::Data{
 			.mass = 0.1f,
-			.max_linear_velocity = {40, 40},
+			.max_linear_velocity = 40,
 		});
 		game_object1.add_component<BehaviorScript>().set_script<Script1>();
 
diff --git a/src/example/game.cpp b/src/example/game.cpp
index 4239c15..8ea50ea 100644
--- a/src/example/game.cpp
+++ b/src/example/game.cpp
@@ -2,6 +2,7 @@
 #include "api/Scene.h"
 #include "manager/ComponentManager.h"
 #include "manager/Mediator.h"
+#include "types.h"
 #include <crepe/api/BoxCollider.h>
 #include <crepe/api/Camera.h>
 #include <crepe/api/Color.h>
@@ -11,7 +12,6 @@
 #include <crepe/api/Rigidbody.h>
 #include <crepe/api/Script.h>
 #include <crepe/api/Sprite.h>
-#include <crepe/api/Texture.h>
 #include <crepe/api/Transform.h>
 #include <crepe/api/Vector2.h>
 
@@ -29,23 +29,23 @@ class MyScript1 : public Script {
 		Log::logf("Box script keypressed()");
 		switch (test.key) {
 			case Keycode::A: {
-				Transform & tf = this->get_component<Transform>();
-				tf.position.x -= 1;
+				Rigidbody & tf = this->get_component<Rigidbody>();
+				tf.data.linear_velocity.x -= 1;
 				break;
 			}
 			case Keycode::W: {
-				Transform & tf = this->get_component<Transform>();
-				tf.position.y -= 1;
+				Rigidbody & tf = this->get_component<Rigidbody>();
+				tf.data.linear_velocity.y -= 1;
 				break;
 			}
 			case Keycode::S: {
-				Transform & tf = this->get_component<Transform>();
-				tf.position.y += 1;
+				Rigidbody & tf = this->get_component<Rigidbody>();
+				tf.data.linear_velocity.y += 1;
 				break;
 			}
 			case Keycode::D: {
-				Transform & tf = this->get_component<Transform>();
-				tf.position.x += 1;
+				Rigidbody & tf = this->get_component<Rigidbody>();
+				tf.data.linear_velocity.x += 1;
 				break;
 			}
 			case Keycode::E: {
@@ -66,6 +66,11 @@ class MyScript1 : public Script {
 				//add collider switch
 				break;
 			}
+			case Keycode::Q: {
+				Rigidbody & rg = this->get_component<Rigidbody>();
+				rg.data.angular_velocity = 1;
+				break;
+			}
 			default:
 				break;
 		}
@@ -80,7 +85,10 @@ class MyScript1 : public Script {
 			[this](const KeyPressEvent & ev) -> bool { return this->keypressed(ev); });
 	}
 	void update() {
-		// Retrieve component from the same GameObject this script is on
+		Rigidbody & tf = this->get_component<Rigidbody>();
+		Log::logf("linear_velocity.x {}", tf.data.linear_velocity.x);
+		Log::logf("linear_velocity.y {}", tf.data.linear_velocity.y);
+		// tf.data.linear_velocity = {0,0};
 	}
 };
 
@@ -155,15 +163,13 @@ public:
 
 	void load_scene() {
 
-		Mediator & m = this->mediator;
-		ComponentManager & mgr = m.component_manager;
 		Color color(0, 0, 0, 255);
 
 		float screen_size_width = 320;
 		float screen_size_height = 240;
 		float world_collider = 1000;
 		//define playable world
-		GameObject world = mgr.new_object(
+		GameObject world = new_object(
 			"Name", "Tag", vec2{screen_size_width / 2, screen_size_height / 2}, 0, 1);
 		world.add_component<Rigidbody>(Rigidbody::Data{
 			.mass = 0,
@@ -184,17 +190,20 @@ public:
 		world.add_component<BoxCollider>(vec2{screen_size_width / 2 + world_collider / 2, 0},
 										 vec2{world_collider, world_collider}); // right
 		world.add_component<Camera>(
-			Color::WHITE,
 			ivec2{static_cast<int>(screen_size_width), static_cast<int>(screen_size_height)},
-			vec2{screen_size_width, screen_size_height}, 1.0f);
+			vec2{screen_size_width, screen_size_height},
+			Camera::Data{
+				.bg_color = Color::WHITE,
+				.zoom = 1,
+			});
 
-		GameObject game_object1 = mgr.new_object(
+		GameObject game_object1 = new_object(
 			"Name", "Tag", vec2{screen_size_width / 2, screen_size_height / 2}, 0, 1);
 		game_object1.add_component<Rigidbody>(Rigidbody::Data{
 			.mass = 1,
-			.gravity_scale = 0,
+			.gravity_scale = 1,
 			.body_type = Rigidbody::BodyType::DYNAMIC,
-			.linear_velocity = {0, 0},
+			.linear_velocity = {0, 1},
 			.constraints = {0, 0, 0},
 			.elastisity_coefficient = 1,
 			.offset = {0, 0},
@@ -203,19 +212,24 @@ public:
 		// add box with boxcollider
 		game_object1.add_component<BoxCollider>(vec2{0, 0}, vec2{20, 20});
 		game_object1.add_component<BehaviorScript>().set_script<MyScript1>();
-		auto img1 = Texture("asset/texture/square.png");
-		game_object1.add_component<Sprite>(img1, color, Sprite::FlipSettings{false, false}, 1,
-										   1, 20);
+
+		Asset img1{"asset/texture/square.png"};
+		game_object1.add_component<Sprite>(img1, Sprite::Data{
+													 .size = {20, 20},
+												 });
 
 		//add circle with cirlcecollider deactiveated
 		game_object1.add_component<CircleCollider>(vec2{0, 0}, 10).active = false;
-		auto img2 = Texture("asset/texture/circle.png");
+		Asset img2{"asset/texture/circle.png"};
 		game_object1
-			.add_component<Sprite>(img2, color, Sprite::FlipSettings{false, false}, 1, 1, 20)
+			.add_component<Sprite>(img2,
+								   Sprite::Data{
+									   .size = {20, 20},
+								   })
 			.active
 			= false;
 
-		GameObject game_object2 = mgr.new_object(
+		GameObject game_object2 = new_object(
 			"Name", "Tag", vec2{screen_size_width / 2, screen_size_height / 2}, 0, 1);
 		game_object2.add_component<Rigidbody>(Rigidbody::Data{
 			.mass = 1,
@@ -230,15 +244,19 @@ public:
 		// add box with boxcollider
 		game_object2.add_component<BoxCollider>(vec2{0, 0}, vec2{20, 20});
 		game_object2.add_component<BehaviorScript>().set_script<MyScript2>();
-		auto img3 = Texture("asset/texture/square.png");
-		game_object2.add_component<Sprite>(img3, color, Sprite::FlipSettings{false, false}, 1,
-										   1, 20);
+
+		game_object2.add_component<Sprite>(img1, Sprite::Data{
+													 .size = {20, 20},
+												 });
 
 		//add circle with cirlcecollider deactiveated
 		game_object2.add_component<CircleCollider>(vec2{0, 0}, 10).active = false;
-		auto img4 = Texture("asset/texture/circle.png");
+
 		game_object2
-			.add_component<Sprite>(img4, color, Sprite::FlipSettings{false, false}, 1, 1, 20)
+			.add_component<Sprite>(img2,
+								   Sprite::Data{
+									   .size = {20, 20},
+								   })
 			.active
 			= false;
 	}
diff --git a/src/example/rendering_particle.cpp b/src/example/rendering_particle.cpp
index bd4ef95..13e625f 100644
--- a/src/example/rendering_particle.cpp
+++ b/src/example/rendering_particle.cpp
@@ -1,6 +1,7 @@
 #include "api/Asset.h"
 #include <crepe/Component.h>
 #include <crepe/api/Animator.h>
+#include <crepe/api/Button.h>
 #include <crepe/api/Camera.h>
 #include <crepe/api/Color.h>
 #include <crepe/api/GameObject.h>
@@ -66,10 +67,21 @@ public:
 		//auto & anim = game_object.add_component<Animator>(test_sprite,ivec2{32, 64}, uvec2{4,1}, Animator::Data{});
 		//anim.set_anim(0);
 
-		auto & cam = game_object.add_component<Camera>(ivec2{1280, 720}, vec2{400, 400},
+		auto & cam = game_object.add_component<Camera>(ivec2{720, 1280}, vec2{400, 400},
 													   Camera::Data{
 														   .bg_color = Color::WHITE,
 													   });
+
+		function<void()> on_click = [&]() { cout << "button clicked" << std::endl; };
+		function<void()> on_enter = [&]() { cout << "enter" << std::endl; };
+		function<void()> on_exit = [&]() { cout << "exit" << std::endl; };
+
+		auto & button
+			= game_object.add_component<Button>(vec2{200, 200}, vec2{0, 0}, on_click, false);
+		button.on_mouse_enter = on_enter;
+		button.on_mouse_exit = on_exit;
+		button.is_toggle = true;
+		button.active = true;
 	}
 
 	string get_name() const { return "TestScene"; };
diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
index 7196404..11b4ca9 100644
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -15,6 +15,8 @@ target_sources(test_main PUBLIC
 	ValueBrokerTest.cpp
 	DBTest.cpp
 	Vector2Test.cpp
+	LoopManagerTest.cpp
+	LoopTimerTest.cpp
 	InputTest.cpp
 	ScriptEventTest.cpp
 	ScriptSceneTest.cpp
diff --git a/src/test/CollisionTest.cpp b/src/test/CollisionTest.cpp
index dd45eb6..5dbc670 100644
--- a/src/test/CollisionTest.cpp
+++ b/src/test/CollisionTest.cpp
@@ -50,6 +50,7 @@ public:
 class CollisionTest : public Test {
 public:
 	Mediator m;
+	EventManager event_mgr{m};
 	ComponentManager mgr{m};
 	CollisionSystem collision_sys{m};
 	ScriptSystem script_sys{m};
diff --git a/src/test/EventTest.cpp b/src/test/EventTest.cpp
index 4a4872d..82272b5 100644
--- a/src/test/EventTest.cpp
+++ b/src/test/EventTest.cpp
@@ -1,56 +1,41 @@
-#include <gmock/gmock.h>
-#include <gtest/gtest.h>
-
 #include <crepe/api/Event.h>
-#include <crepe/api/IKeyListener.h>
-#include <crepe/api/IMouseListener.h>
 #include <crepe/manager/EventManager.h>
-
+#include <crepe/manager/Mediator.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
 using namespace std;
 using namespace std::chrono_literals;
 using namespace crepe;
 
 class EventManagerTest : public ::testing::Test {
 protected:
+	Mediator mediator;
+	EventManager event_mgr{mediator};
 	void SetUp() override {
 		// Clear any existing subscriptions or events before each test
-		EventManager::get_instance().clear();
+		event_mgr.clear();
 	}
 
 	void TearDown() override {
 		// Ensure cleanup after each test
-		EventManager::get_instance().clear();
+		event_mgr.clear();
 	}
 };
-class MockKeyListener : public IKeyListener {
-public:
-	MOCK_METHOD(bool, on_key_pressed, (const KeyPressEvent & event), (override));
-	MOCK_METHOD(bool, on_key_released, (const KeyReleaseEvent & event), (override));
-};
-
-class MockMouseListener : public IMouseListener {
-public:
-	MOCK_METHOD(bool, on_mouse_clicked, (const MouseClickEvent & event), (override));
-	MOCK_METHOD(bool, on_mouse_pressed, (const MousePressEvent & event), (override));
-	MOCK_METHOD(bool, on_mouse_released, (const MouseReleaseEvent & event), (override));
-	MOCK_METHOD(bool, on_mouse_moved, (const MouseMoveEvent & event), (override));
-};
-
 TEST_F(EventManagerTest, EventSubscription) {
 	EventHandler<KeyPressEvent> key_handler = [](const KeyPressEvent & e) { return true; };
 
 	// Subscribe to KeyPressEvent
-	EventManager::get_instance().subscribe<KeyPressEvent>(key_handler, 1);
+	event_mgr.subscribe<KeyPressEvent>(key_handler, 1);
 
 	// Verify subscription (not directly verifiable; test by triggering event)
 
-	EventManager::get_instance().trigger_event<KeyPressEvent>(
+	event_mgr.trigger_event<KeyPressEvent>(
 		KeyPressEvent{
 			.repeat = true,
 			.key = Keycode::A,
 		},
 		1);
-	EventManager::get_instance().trigger_event<KeyPressEvent>(
+	event_mgr.trigger_event<KeyPressEvent>(
 		KeyPressEvent{
 			.repeat = true,
 			.key = Keycode::A,
@@ -68,13 +53,11 @@ TEST_F(EventManagerTest, EventManagerTest_trigger_all_channels) {
 		EXPECT_EQ(e.button, MouseButton::LEFT_MOUSE);
 		return false;
 	};
-	EventManager::get_instance().subscribe<MouseClickEvent>(mouse_handler,
-															EventManager::CHANNEL_ALL);
+	event_mgr.subscribe<MouseClickEvent>(mouse_handler, EventManager::CHANNEL_ALL);
 
 	MouseClickEvent click_event{
 		.mouse_x = 100, .mouse_y = 200, .button = MouseButton::LEFT_MOUSE};
-	EventManager::get_instance().trigger_event<MouseClickEvent>(click_event,
-																EventManager::CHANNEL_ALL);
+	event_mgr.trigger_event<MouseClickEvent>(click_event, EventManager::CHANNEL_ALL);
 
 	EXPECT_TRUE(triggered);
 }
@@ -88,19 +71,17 @@ TEST_F(EventManagerTest, EventManagerTest_trigger_one_channel) {
 		EXPECT_EQ(e.button, MouseButton::LEFT_MOUSE);
 		return false;
 	};
-	EventManager::get_instance().subscribe<MouseClickEvent>(mouse_handler, test_channel);
+	event_mgr.subscribe<MouseClickEvent>(mouse_handler, test_channel);
 
 	MouseClickEvent click_event{
 		.mouse_x = 100, .mouse_y = 200, .button = MouseButton::LEFT_MOUSE};
-	EventManager::get_instance().trigger_event<MouseClickEvent>(click_event,
-																EventManager::CHANNEL_ALL);
+	event_mgr.trigger_event<MouseClickEvent>(click_event, EventManager::CHANNEL_ALL);
 
 	EXPECT_FALSE(triggered);
-	EventManager::get_instance().trigger_event<MouseClickEvent>(click_event, test_channel);
+	event_mgr.trigger_event<MouseClickEvent>(click_event, test_channel);
 }
 
 TEST_F(EventManagerTest, EventManagerTest_callback_propagation) {
-	EventManager & event_manager = EventManager::get_instance();
 
 	// Flags to track handler calls
 	bool triggered_true = false;
@@ -126,11 +107,11 @@ TEST_F(EventManagerTest, EventManagerTest_callback_propagation) {
 	// Test event
 	MouseClickEvent click_event{
 		.mouse_x = 100, .mouse_y = 200, .button = MouseButton::LEFT_MOUSE};
-	event_manager.subscribe<MouseClickEvent>(mouse_handler_true, EventManager::CHANNEL_ALL);
-	event_manager.subscribe<MouseClickEvent>(mouse_handler_false, EventManager::CHANNEL_ALL);
+	event_mgr.subscribe<MouseClickEvent>(mouse_handler_true, EventManager::CHANNEL_ALL);
+	event_mgr.subscribe<MouseClickEvent>(mouse_handler_false, EventManager::CHANNEL_ALL);
 
 	// Trigger event
-	event_manager.trigger_event<MouseClickEvent>(click_event, EventManager::CHANNEL_ALL);
+	event_mgr.trigger_event<MouseClickEvent>(click_event, EventManager::CHANNEL_ALL);
 
 	// Check that only the true handler was triggered
 	EXPECT_TRUE(triggered_true);
@@ -139,12 +120,12 @@ TEST_F(EventManagerTest, EventManagerTest_callback_propagation) {
 	// Reset and clear
 	triggered_true = false;
 	triggered_false = false;
-	event_manager.clear();
-	event_manager.subscribe<MouseClickEvent>(mouse_handler_false, EventManager::CHANNEL_ALL);
-	event_manager.subscribe<MouseClickEvent>(mouse_handler_true, EventManager::CHANNEL_ALL);
+	event_mgr.clear();
+	event_mgr.subscribe<MouseClickEvent>(mouse_handler_false, EventManager::CHANNEL_ALL);
+	event_mgr.subscribe<MouseClickEvent>(mouse_handler_true, EventManager::CHANNEL_ALL);
 
 	// Trigger event again
-	event_manager.trigger_event<MouseClickEvent>(click_event, EventManager::CHANNEL_ALL);
+	event_mgr.trigger_event<MouseClickEvent>(click_event, EventManager::CHANNEL_ALL);
 
 	// Check that both handlers were triggered
 	EXPECT_TRUE(triggered_true);
@@ -152,47 +133,37 @@ TEST_F(EventManagerTest, EventManagerTest_callback_propagation) {
 }
 
 TEST_F(EventManagerTest, EventManagerTest_queue_dispatch) {
-	EventManager & event_manager = EventManager::get_instance();
 	bool triggered1 = false;
 	bool triggered2 = false;
 	int test_channel = 1;
-
-	// Adjusted to use KeyPressEvent with repeat as the first variable
-	EventHandler<KeyPressEvent> key_handler1 = [&](const KeyPressEvent & e) {
+	EventHandler<MouseClickEvent> mouse_handler1 = [&](const MouseClickEvent & e) {
 		triggered1 = true;
-		EXPECT_EQ(e.repeat, false); // Expecting repeat to be false
-		EXPECT_EQ(e.key, Keycode::A); // Adjust expected key code
+		EXPECT_EQ(e.mouse_x, 100);
+		EXPECT_EQ(e.mouse_y, 200);
+		EXPECT_EQ(e.button, MouseButton::LEFT_MOUSE);
 		return false; // Allows propagation
 	};
-
-	EventHandler<KeyPressEvent> key_handler2 = [&](const KeyPressEvent & e) {
+	EventHandler<MouseClickEvent> mouse_handler2 = [&](const MouseClickEvent & e) {
 		triggered2 = true;
-		EXPECT_EQ(e.repeat, false); // Expecting repeat to be false
-		EXPECT_EQ(e.key, Keycode::A); // Adjust expected key code
+		EXPECT_EQ(e.mouse_x, 100);
+		EXPECT_EQ(e.mouse_y, 200);
+		EXPECT_EQ(e.button, MouseButton::LEFT_MOUSE);
 		return false; // Allows propagation
 	};
+	event_mgr.subscribe<MouseClickEvent>(mouse_handler1);
+	event_mgr.subscribe<MouseClickEvent>(mouse_handler2, test_channel);
 
-	// Subscribe handlers to KeyPressEvent
-	event_manager.subscribe<KeyPressEvent>(key_handler1);
-	event_manager.subscribe<KeyPressEvent>(key_handler2, test_channel);
-
-	// Queue a KeyPressEvent instead of KeyDownEvent
-	event_manager.queue_event<KeyPressEvent>(KeyPressEvent{
-		.repeat = false, .key = Keycode::A}); // Adjust event with repeat flag first
-
-	event_manager.queue_event<KeyPressEvent>(
-		KeyPressEvent{.repeat = false,
-					  .key = Keycode::A}, // Adjust event for second subscription
+	event_mgr.queue_event<MouseClickEvent>(
+		MouseClickEvent{.mouse_x = 100, .mouse_y = 200, .button = MouseButton::LEFT_MOUSE});
+	event_mgr.queue_event<MouseClickEvent>(
+		MouseClickEvent{.mouse_x = 100, .mouse_y = 200, .button = MouseButton::LEFT_MOUSE},
 		test_channel);
-
-	event_manager.dispatch_events();
-
+	event_mgr.dispatch_events();
 	EXPECT_TRUE(triggered1);
 	EXPECT_TRUE(triggered2);
 }
 
 TEST_F(EventManagerTest, EventManagerTest_unsubscribe) {
-	EventManager & event_manager = EventManager::get_instance();
 
 	// Flags to track if handlers are triggered
 	bool triggered1 = false;
@@ -215,15 +186,15 @@ TEST_F(EventManagerTest, EventManagerTest_unsubscribe) {
 		return false; // Allows propagation
 	};
 	// Subscribe handlers
-	subscription_t handler1_id = event_manager.subscribe<MouseClickEvent>(mouse_handler1);
-	subscription_t handler2_id = event_manager.subscribe<MouseClickEvent>(mouse_handler2);
+	subscription_t handler1_id = event_mgr.subscribe<MouseClickEvent>(mouse_handler1);
+	subscription_t handler2_id = event_mgr.subscribe<MouseClickEvent>(mouse_handler2);
 
 	// Queue events
-	event_manager.queue_event<MouseClickEvent>(
+	event_mgr.queue_event<MouseClickEvent>(
 		MouseClickEvent{.mouse_x = 100, .mouse_y = 200, .button = MouseButton::LEFT_MOUSE});
 
 	// Dispatch events - both handlers should be triggered
-	event_manager.dispatch_events();
+	event_mgr.dispatch_events();
 	EXPECT_TRUE(triggered1); // Handler 1 should be triggered
 	EXPECT_TRUE(triggered2); // Handler 2 should be triggered
 
@@ -232,14 +203,14 @@ TEST_F(EventManagerTest, EventManagerTest_unsubscribe) {
 	triggered2 = false;
 
 	// Unsubscribe handler1
-	event_manager.unsubscribe(handler1_id);
+	event_mgr.unsubscribe(handler1_id);
 
 	// Queue the same event again
-	event_manager.queue_event<MouseClickEvent>(
+	event_mgr.queue_event<MouseClickEvent>(
 		MouseClickEvent{.mouse_x = 100, .mouse_y = 200, .button = MouseButton::LEFT_MOUSE});
 
 	// Dispatch events - only handler 2 should be triggered, handler 1 should NOT
-	event_manager.dispatch_events();
+	event_mgr.dispatch_events();
 	EXPECT_FALSE(triggered1); // Handler 1 should NOT be triggered
 	EXPECT_TRUE(triggered2); // Handler 2 should be triggered
 
@@ -247,14 +218,14 @@ TEST_F(EventManagerTest, EventManagerTest_unsubscribe) {
 	triggered2 = false;
 
 	// Unsubscribe handler2
-	event_manager.unsubscribe(handler2_id);
+	event_mgr.unsubscribe(handler2_id);
 
 	// Queue the event again
-	event_manager.queue_event<MouseClickEvent>(
+	event_mgr.queue_event<MouseClickEvent>(
 		MouseClickEvent{.mouse_x = 100, .mouse_y = 200, .button = MouseButton::LEFT_MOUSE});
 
 	// Dispatch events - no handler should be triggered
-	event_manager.dispatch_events();
+	event_mgr.dispatch_events();
 	EXPECT_FALSE(triggered1); // Handler 1 should NOT be triggered
 	EXPECT_FALSE(triggered2); // Handler 2 should NOT be triggered
 }
diff --git a/src/test/InputTest.cpp b/src/test/InputTest.cpp
index 4c05e56..8b40cea 100644
--- a/src/test/InputTest.cpp
+++ b/src/test/InputTest.cpp
@@ -1,3 +1,4 @@
+#include "system/RenderSystem.h"
 #include <gtest/gtest.h>
 #define protected public
 #define private public
@@ -27,15 +28,20 @@ public:
 	SDLContext sdl_context{mediator};
 
 	InputSystem input_system{mediator};
-
-	EventManager & event_manager = EventManager::get_instance();
+	RenderSystem render{mediator};
+	EventManager event_manager{mediator};
 	//GameObject camera;
 
 protected:
 	void SetUp() override {
-		mediator.event_manager = event_manager;
-		mediator.component_manager = mgr;
-		event_manager.clear();
+		GameObject obj = mgr.new_object("camera", "camera", vec2{0, 0}, 0, 1);
+		auto & camera
+			= obj.add_component<Camera>(ivec2{500, 500}, vec2{500, 500},
+										Camera::Data{.bg_color = Color::WHITE, .zoom = 1.0f});
+		render.update();
+		//mediator.event_manager = event_manager;
+		//mediator.component_manager = mgr;
+		//event_manager.clear();
 	}
 
 	void simulate_mouse_click(int mouse_x, int mouse_y, Uint8 mouse_button) {
@@ -60,10 +66,6 @@ protected:
 };
 
 TEST_F(InputTest, MouseDown) {
-	GameObject obj = mgr.new_object("camera", "camera", vec2{0, 0}, 0, 1);
-	auto & camera = obj.add_component<Camera>(
-		ivec2{0, 0}, vec2{500, 500}, Camera::Data{.bg_color = Color::WHITE, .zoom = 1.0f});
-	camera.active = true;
 	bool mouse_triggered = false;
 	EventHandler<MousePressEvent> on_mouse_down = [&](const MousePressEvent & event) {
 		mouse_triggered = true;
@@ -90,10 +92,6 @@ TEST_F(InputTest, MouseDown) {
 }
 
 TEST_F(InputTest, MouseUp) {
-	GameObject obj = mgr.new_object("camera", "camera", vec2{0, 0}, 0, 1);
-	auto & camera = obj.add_component<Camera>(
-		ivec2{0, 0}, vec2{500, 500}, Camera::Data{.bg_color = Color::WHITE, .zoom = 1.0f});
-	camera.active = true;
 	bool function_triggered = false;
 	EventHandler<MouseReleaseEvent> on_mouse_release = [&](const MouseReleaseEvent & e) {
 		function_triggered = true;
@@ -118,10 +116,6 @@ TEST_F(InputTest, MouseUp) {
 }
 
 TEST_F(InputTest, MouseMove) {
-	GameObject obj = mgr.new_object("camera", "camera", vec2{0, 0}, 0, 1);
-	auto & camera = obj.add_component<Camera>(
-		ivec2{0, 0}, vec2{500, 500}, Camera::Data{.bg_color = Color::WHITE, .zoom = 1.0f});
-	camera.active = true;
 	bool function_triggered = false;
 	EventHandler<MouseMoveEvent> on_mouse_move = [&](const MouseMoveEvent & e) {
 		function_triggered = true;
@@ -148,10 +142,6 @@ TEST_F(InputTest, MouseMove) {
 }
 
 TEST_F(InputTest, KeyDown) {
-	GameObject obj = mgr.new_object("camera", "camera", vec2{0, 0}, 0, 1);
-	auto & camera = obj.add_component<Camera>(
-		ivec2{0, 0}, vec2{500, 500}, Camera::Data{.bg_color = Color::WHITE, .zoom = 1.0f});
-	camera.active = true;
 	bool function_triggered = false;
 
 	// Define event handler for KeyPressEvent
@@ -179,10 +169,6 @@ TEST_F(InputTest, KeyDown) {
 }
 
 TEST_F(InputTest, KeyUp) {
-	GameObject obj = mgr.new_object("camera", "camera", vec2{0, 0}, 0, 1);
-	auto & camera = obj.add_component<Camera>(
-		ivec2{0, 0}, vec2{500, 500}, Camera::Data{.bg_color = Color::WHITE, .zoom = 1.0f});
-	camera.active = true;
 	bool function_triggered = false;
 	EventHandler<KeyReleaseEvent> on_key_release = [&](const KeyReleaseEvent & event) {
 		function_triggered = true;
@@ -203,10 +189,6 @@ TEST_F(InputTest, KeyUp) {
 }
 
 TEST_F(InputTest, MouseClick) {
-	GameObject obj = mgr.new_object("camera", "camera", vec2{0, 0}, 0, 1);
-	auto & camera = obj.add_component<Camera>(
-		ivec2{0, 0}, vec2{500, 500}, Camera::Data{.bg_color = Color::WHITE, .zoom = 1.0f});
-	camera.active = true;
 	bool on_click_triggered = false;
 	EventHandler<MouseClickEvent> on_mouse_click = [&](const MouseClickEvent & event) {
 		on_click_triggered = true;
@@ -224,10 +206,6 @@ TEST_F(InputTest, MouseClick) {
 }
 
 TEST_F(InputTest, testButtonClick) {
-	GameObject obj = mgr.new_object("camera", "camera", vec2{0, 0}, 0, 1);
-	auto & camera = obj.add_component<Camera>(
-		ivec2{0, 0}, vec2{500, 500}, Camera::Data{.bg_color = Color::WHITE, .zoom = 1.0f});
-	camera.active = true;
 	GameObject button_obj = mgr.new_object("body", "person", vec2{0, 0}, 0, 1);
 	bool button_clicked = false;
 	std::function<void()> on_click = [&]() { button_clicked = true; };
@@ -251,10 +229,6 @@ TEST_F(InputTest, testButtonClick) {
 }
 
 TEST_F(InputTest, testButtonHover) {
-	GameObject obj = mgr.new_object("camera", "camera", vec2{0, 0}, 0, 1);
-	auto & camera = obj.add_component<Camera>(
-		ivec2{0, 0}, vec2{500, 500}, Camera::Data{.bg_color = Color::WHITE, .zoom = 1.0f});
-	camera.active = true;
 	GameObject button_obj = mgr.new_object("body", "person", vec2{0, 0}, 0, 1);
 	bool button_clicked = false;
 	std::function<void()> on_click = [&]() { button_clicked = true; };
diff --git a/src/test/LoopManagerTest.cpp b/src/test/LoopManagerTest.cpp
new file mode 100644
index 0000000..df132ae
--- /dev/null
+++ b/src/test/LoopManagerTest.cpp
@@ -0,0 +1,78 @@
+#include <chrono>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <thread>
+#define private public
+#define protected public
+#include <crepe/api/LoopManager.h>
+#include <crepe/manager/EventManager.h>
+#include <crepe/manager/LoopTimerManager.h>
+using namespace std::chrono;
+using namespace crepe;
+
+class DISABLED_LoopManagerTest : public ::testing::Test {
+protected:
+	class TestGameLoop : public crepe::LoopManager {
+	public:
+		MOCK_METHOD(void, fixed_update, (), (override));
+		MOCK_METHOD(void, frame_update, (), (override));
+	};
+
+	TestGameLoop test_loop;
+	void SetUp() override {}
+};
+
+TEST_F(DISABLED_LoopManagerTest, FixedUpdate) {
+	// Arrange
+	test_loop.loop_timer.set_target_framerate(60);
+
+	// Set expectations for the mock calls
+	EXPECT_CALL(test_loop, frame_update).Times(::testing::Between(55, 65));
+	EXPECT_CALL(test_loop, fixed_update).Times(::testing::Between(48, 52));
+
+	// Start the loop in a separate thread
+	std::thread loop_thread([&]() { test_loop.start(); });
+
+	// Let the loop run for exactly 1 second
+	std::this_thread::sleep_for(std::chrono::seconds(1));
+
+	// Stop the game loop
+	test_loop.game_running = false;
+	// Wait for the loop thread to finish
+	loop_thread.join();
+
+	// Test finished
+}
+
+TEST_F(DISABLED_LoopManagerTest, ScaledFixedUpdate) {
+	// Arrange
+	test_loop.loop_timer.set_target_framerate(60);
+
+	// Set expectations for the mock calls
+	EXPECT_CALL(test_loop, frame_update).Times(::testing::Between(55, 65));
+	EXPECT_CALL(test_loop, fixed_update).Times(::testing::Between(48, 52));
+
+	// Start the loop in a separate thread
+	std::thread loop_thread([&]() { test_loop.start(); });
+
+	// Let the loop run for exactly 1 second
+	std::this_thread::sleep_for(std::chrono::seconds(1));
+
+	// Stop the game loop
+	test_loop.game_running = false;
+	// Wait for the loop thread to finish
+	loop_thread.join();
+
+	// Test finished
+}
+
+TEST_F(DISABLED_LoopManagerTest, ShutDown) {
+	// Arrange
+	test_loop.loop_timer.set_target_framerate(60);
+	// Start the loop in a separate thread
+	std::thread loop_thread([&]() { test_loop.start(); });
+	std::this_thread::sleep_for(std::chrono::milliseconds(1));
+	test_loop.event_manager.trigger_event<ShutDownEvent>(ShutDownEvent{});
+	// Wait for the loop thread to finish
+	loop_thread.join();
+}
diff --git a/src/test/LoopTimerTest.cpp b/src/test/LoopTimerTest.cpp
new file mode 100644
index 0000000..7bd6305
--- /dev/null
+++ b/src/test/LoopTimerTest.cpp
@@ -0,0 +1,97 @@
+#include <chrono>
+#include <gtest/gtest.h>
+#include <thread>
+
+#define private public
+#define protected public
+
+#include <crepe/manager/LoopTimerManager.h>
+#include <crepe/manager/Mediator.h>
+
+using namespace std::chrono;
+using namespace crepe;
+
+class LoopTimerTest : public ::testing::Test {
+protected:
+	Mediator mediator;
+	LoopTimerManager loop_timer{mediator};
+
+	void SetUp() override { loop_timer.start(); }
+};
+
+TEST_F(LoopTimerTest, EnforcesTargetFrameRate) {
+	// Set the target FPS to 60 (which gives a target time per frame of ~16.67 ms)
+	loop_timer.set_target_framerate(60);
+
+	auto start_time = steady_clock::now();
+	loop_timer.enforce_frame_rate();
+
+	auto elapsed_time = steady_clock::now() - start_time;
+	auto elapsed_ms = duration_cast<milliseconds>(elapsed_time).count();
+
+	// For 60 FPS, the target frame time is around 16.67ms
+	ASSERT_NEAR(elapsed_ms, 16.7, 5);
+}
+
+TEST_F(LoopTimerTest, SetTargetFps) {
+	// Set the target FPS to 120
+	loop_timer.set_target_framerate(120);
+
+	// Calculate the expected frame time (~8.33ms per frame)
+	duration_t expected_frame_time = std::chrono::duration<float>(1.0 / 120.0);
+
+	ASSERT_NEAR(loop_timer.frame_target_time.count(), expected_frame_time.count(), 0.001);
+}
+
+TEST_F(LoopTimerTest, DeltaTimeCalculation) {
+	// Set the target FPS to 60 (16.67 ms per frame)
+	loop_timer.set_target_framerate(60);
+
+	auto start_time = steady_clock::now();
+	loop_timer.update();
+	auto end_time = steady_clock::now();
+
+	// Check the delta time
+	duration_t delta_time = loop_timer.get_delta_time();
+
+	auto elapsed_time = duration_cast<seconds>(end_time - start_time).count();
+
+	// Assert that delta_time is close to the elapsed time
+	ASSERT_NEAR(delta_time.count(), elapsed_time, 1);
+}
+
+TEST_F(LoopTimerTest, DISABLED_getCurrentTime) {
+	// Set the target FPS to 60 (16.67 ms per frame)
+	loop_timer.set_target_framerate(60);
+
+	auto start_time = steady_clock::now();
+
+	// Sleep
+	std::this_thread::sleep_for(std::chrono::milliseconds(100));
+
+	loop_timer.update();
+
+	auto end_time = steady_clock::now();
+
+	// Get the elapsed time in seconds as a double
+	auto elapsed_time
+		= std::chrono::duration_cast<elapsed_time_t>(end_time - start_time).count();
+
+	ASSERT_NEAR(loop_timer.get_elapsed_time().count(), elapsed_time, 5);
+}
+TEST_F(LoopTimerTest, getFPS) {
+	// Set the target FPS to 60 (which gives a target time per frame of ~16.67 ms)
+	loop_timer.set_target_framerate(60);
+
+	auto start_time = steady_clock::now();
+	loop_timer.enforce_frame_rate();
+
+	auto elapsed_time = steady_clock::now() - start_time;
+	loop_timer.update();
+	unsigned int fps = loop_timer.get_fps();
+	auto elapsed_ms = duration_cast<milliseconds>(elapsed_time).count();
+
+	// For 60 FPS, the target frame time is around 16.67ms
+	ASSERT_NEAR(elapsed_ms, 16.7, 1);
+	ASSERT_NEAR(fps, 60, 2);
+}
diff --git a/src/test/PhysicsTest.cpp b/src/test/PhysicsTest.cpp
index 43d2931..3afb3c7 100644
--- a/src/test/PhysicsTest.cpp
+++ b/src/test/PhysicsTest.cpp
@@ -3,6 +3,8 @@
 #include <crepe/api/Rigidbody.h>
 #include <crepe/api/Transform.h>
 #include <crepe/manager/ComponentManager.h>
+#include <crepe/manager/LoopTimerManager.h>
+#include <crepe/manager/Mediator.h>
 #include <crepe/system/PhysicsSystem.h>
 #include <gtest/gtest.h>
 
@@ -16,6 +18,7 @@ class PhysicsTest : public ::testing::Test {
 public:
 	ComponentManager component_manager{m};
 	PhysicsSystem system{m};
+	LoopTimerManager loop_timer{m};
 
 	void SetUp() override {
 		ComponentManager & mgr = this->component_manager;
@@ -27,7 +30,7 @@ public:
 				.mass = 1,
 				.gravity_scale = 1,
 				.body_type = Rigidbody::BodyType::DYNAMIC,
-				.max_linear_velocity = vec2{10, 10},
+				.max_linear_velocity = 10,
 				.max_angular_velocity = 10,
 				.constraints = {0, 0},
 			});
@@ -55,39 +58,40 @@ TEST_F(PhysicsTest, gravity) {
 	EXPECT_EQ(transform.position.y, 0);
 
 	system.update();
-	EXPECT_EQ(transform.position.y, 1);
+	EXPECT_NEAR(transform.position.y, 0.0004, 0.0001);
 
 	system.update();
-	EXPECT_EQ(transform.position.y, 3);
+	EXPECT_NEAR(transform.position.y, 0.002, 0.001);
 }
 
 TEST_F(PhysicsTest, max_velocity) {
 	ComponentManager & mgr = this->component_manager;
 	vector<reference_wrapper<Rigidbody>> rigidbodies = mgr.get_components_by_id<Rigidbody>(0);
 	Rigidbody & rigidbody = rigidbodies.front().get();
+	rigidbody.data.gravity_scale = 0;
 	ASSERT_FALSE(rigidbodies.empty());
 	EXPECT_EQ(rigidbody.data.linear_velocity.y, 0);
 
 	rigidbody.add_force_linear({100, 100});
 	rigidbody.add_force_angular(100);
 	system.update();
-	EXPECT_EQ(rigidbody.data.linear_velocity.y, 10);
-	EXPECT_EQ(rigidbody.data.linear_velocity.x, 10);
+	EXPECT_NEAR(rigidbody.data.linear_velocity.y, 7.07, 0.01);
+	EXPECT_NEAR(rigidbody.data.linear_velocity.x, 7.07, 0.01);
 	EXPECT_EQ(rigidbody.data.angular_velocity, 10);
 
 	rigidbody.add_force_linear({-100, -100});
 	rigidbody.add_force_angular(-100);
 	system.update();
-	EXPECT_EQ(rigidbody.data.linear_velocity.y, -10);
-	EXPECT_EQ(rigidbody.data.linear_velocity.x, -10);
+	EXPECT_NEAR(rigidbody.data.linear_velocity.y, -7.07, 0.01);
+	EXPECT_NEAR(rigidbody.data.linear_velocity.x, -7.07, 0.01);
 	EXPECT_EQ(rigidbody.data.angular_velocity, -10);
 }
 
 TEST_F(PhysicsTest, movement) {
-	Config::get_instance().physics.gravity = 0;
 	ComponentManager & mgr = this->component_manager;
 	vector<reference_wrapper<Rigidbody>> rigidbodies = mgr.get_components_by_id<Rigidbody>(0);
 	Rigidbody & rigidbody = rigidbodies.front().get();
+	rigidbody.data.gravity_scale = 0;
 	vector<reference_wrapper<Transform>> transforms = mgr.get_components_by_id<Transform>(0);
 	const Transform & transform = transforms.front().get();
 	ASSERT_FALSE(rigidbodies.empty());
@@ -96,31 +100,33 @@ TEST_F(PhysicsTest, movement) {
 	rigidbody.add_force_linear({1, 1});
 	rigidbody.add_force_angular(1);
 	system.update();
-	EXPECT_EQ(transform.position.x, 1);
-	EXPECT_EQ(transform.position.y, 1);
-	EXPECT_EQ(transform.rotation, 1);
+	EXPECT_NEAR(transform.position.x, 0.02, 0.001);
+	EXPECT_NEAR(transform.position.y, 0.02, 0.001);
+	EXPECT_NEAR(transform.rotation, 0.02, 0.001);
 
 	rigidbody.data.constraints = {1, 1, 1};
-	EXPECT_EQ(transform.position.x, 1);
-	EXPECT_EQ(transform.position.y, 1);
-	EXPECT_EQ(transform.rotation, 1);
-
+	EXPECT_NEAR(transform.position.x, 0.02, 0.001);
+	EXPECT_NEAR(transform.position.y, 0.02, 0.001);
+	EXPECT_NEAR(transform.rotation, 0.02, 0.001);
+	rigidbody.data.constraints = {0, 0, 0};
 	rigidbody.data.linear_velocity_coefficient.x = 0.5;
 	rigidbody.data.linear_velocity_coefficient.y = 0.5;
 	rigidbody.data.angular_velocity_coefficient = 0.5;
 	system.update();
-	EXPECT_EQ(rigidbody.data.linear_velocity.x, 0.5);
-	EXPECT_EQ(rigidbody.data.linear_velocity.y, 0.5);
-	EXPECT_EQ(rigidbody.data.angular_velocity, 0.5);
+	EXPECT_NEAR(rigidbody.data.linear_velocity.x, 0.98, 0.01);
+	EXPECT_NEAR(rigidbody.data.linear_velocity.y, 0.98, 0.01);
+	EXPECT_NEAR(rigidbody.data.angular_velocity, 0.98, 0.01);
 
 	rigidbody.data.constraints = {1, 1, 0};
 	rigidbody.data.angular_velocity_coefficient = 0;
 	rigidbody.data.max_angular_velocity = 1000;
 	rigidbody.data.angular_velocity = 360;
 	system.update();
-	EXPECT_EQ(transform.rotation, 1);
+	EXPECT_NEAR(transform.rotation, 7.24, 0.01);
 
 	rigidbody.data.angular_velocity = -360;
 	system.update();
-	EXPECT_EQ(transform.rotation, 1);
+	EXPECT_NEAR(transform.rotation, 0.04, 0.001);
+	system.update();
+	EXPECT_NEAR(transform.rotation, 352.84, 0.01);
 }
diff --git a/src/test/Profiling.cpp b/src/test/Profiling.cpp
index cc4c637..35f52dc 100644
--- a/src/test/Profiling.cpp
+++ b/src/test/Profiling.cpp
@@ -17,6 +17,7 @@
 #include <crepe/api/Rigidbody.h>
 #include <crepe/api/Script.h>
 #include <crepe/api/Transform.h>
+#include <crepe/facade/SDLContext.h>
 #include <crepe/manager/ComponentManager.h>
 #include <crepe/manager/EventManager.h>
 #include <crepe/system/CollisionSystem.h>
diff --git a/src/test/SceneManagerTest.cpp b/src/test/SceneManagerTest.cpp
index 9bb260c..480e07a 100644
--- a/src/test/SceneManagerTest.cpp
+++ b/src/test/SceneManagerTest.cpp
@@ -15,11 +15,9 @@ using namespace crepe;
 class ConcreteScene1 : public Scene {
 public:
 	void load_scene() {
-		Mediator & mediator = this->mediator;
-		ComponentManager & mgr = mediator.component_manager;
-		GameObject object1 = mgr.new_object("scene_1", "tag_scene_1", vec2{0, 0}, 0, 1);
-		GameObject object2 = mgr.new_object("scene_1", "tag_scene_1", vec2{1, 0}, 0, 1);
-		GameObject object3 = mgr.new_object("scene_1", "tag_scene_1", vec2{2, 0}, 0, 1);
+		GameObject object1 = new_object("scene_1", "tag_scene_1", vec2{0, 0}, 0, 1);
+		GameObject object2 = new_object("scene_1", "tag_scene_1", vec2{1, 0}, 0, 1);
+		GameObject object3 = new_object("scene_1", "tag_scene_1", vec2{2, 0}, 0, 1);
 	}
 
 	string get_name() const { return "scene1"; }
@@ -28,12 +26,10 @@ public:
 class ConcreteScene2 : public Scene {
 public:
 	void load_scene() {
-		Mediator & mediator = this->mediator;
-		ComponentManager & mgr = mediator.component_manager;
-		GameObject object1 = mgr.new_object("scene_2", "tag_scene_2", vec2{0, 0}, 0, 1);
-		GameObject object2 = mgr.new_object("scene_2", "tag_scene_2", vec2{0, 1}, 0, 1);
-		GameObject object3 = mgr.new_object("scene_2", "tag_scene_2", vec2{0, 2}, 0, 1);
-		GameObject object4 = mgr.new_object("scene_2", "tag_scene_2", vec2{0, 3}, 0, 1);
+		GameObject object1 = new_object("scene_2", "tag_scene_2", vec2{0, 0}, 0, 1);
+		GameObject object2 = new_object("scene_2", "tag_scene_2", vec2{0, 1}, 0, 1);
+		GameObject object3 = new_object("scene_2", "tag_scene_2", vec2{0, 2}, 0, 1);
+		GameObject object4 = new_object("scene_2", "tag_scene_2", vec2{0, 3}, 0, 1);
 	}
 
 	string get_name() const { return "scene2"; }
@@ -44,9 +40,7 @@ public:
 	ConcreteScene3(const string & name) : name(name) {}
 
 	void load_scene() {
-		Mediator & mediator = this->mediator;
-		ComponentManager & mgr = mediator.component_manager;
-		GameObject object1 = mgr.new_object("scene_3", "tag_scene_3", vec2{0, 0}, 0, 1);
+		GameObject object1 = new_object("scene_3", "tag_scene_3", vec2{0, 0}, 0, 1);
 	}
 
 	string get_name() const { return name; }
diff --git a/src/test/ScriptTest.h b/src/test/ScriptTest.h
index 309e016..31fa7c9 100644
--- a/src/test/ScriptTest.h
+++ b/src/test/ScriptTest.h
@@ -6,8 +6,8 @@
 #include <crepe/api/BehaviorScript.h>
 #include <crepe/api/Script.h>
 #include <crepe/manager/ComponentManager.h>
+#include <crepe/manager/EventManager.h>
 #include <crepe/system/ScriptSystem.h>
-
 class ScriptTest : public testing::Test {
 protected:
 	crepe::Mediator mediator;
@@ -16,6 +16,7 @@ protected:
 public:
 	crepe::ComponentManager component_manager{mediator};
 	crepe::ScriptSystem system{mediator};
+	crepe::EventManager event_mgr{mediator};
 	crepe::GameObject entity = component_manager.new_object(OBJ_NAME);
 
 	class MyScript : public crepe::Script {