diff --git a/.gitignore b/.gitignore
index 959882a..cb22b9f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,18 @@ bin-int/
 
 # VS Files
 **.vcxproj**
-**.sln
\ No newline at end of file
+**.sln
+
+.codelite/
+.build-debug/
+**.workspace
+
+Makefile
+
+**/**.mk
+
+**/**.project
+
+**/Engine.txt
+**/GLAD.txt
+**/Sandbox.txt
\ No newline at end of file
diff --git a/Dependencies/GLFW b/Dependencies/GLFW
index 23f9926..59a32ba 160000
--- a/Dependencies/GLFW
+++ b/Dependencies/GLFW
@@ -1 +1 @@
-Subproject commit 23f99263cdb8db054db5202f605e5730aec4e3c3
+Subproject commit 59a32baf70eadf12bfc22234c3bb1c5c28931a2c
diff --git a/Dependencies/imgui b/Dependencies/imgui
index e401b8f..b238424 160000
--- a/Dependencies/imgui
+++ b/Dependencies/imgui
@@ -1 +1 @@
-Subproject commit e401b8f2c0e89ddd783245a88549f5c5e23a2c21
+Subproject commit b238424f840544f64b0597f86c59b8810ca2b933
diff --git a/Engine/premake5.lua b/Engine/premake5.lua
index 9d1ed2c..fa8f989 100644
--- a/Engine/premake5.lua
+++ b/Engine/premake5.lua
@@ -31,15 +31,15 @@ project "Engine"
 	includedirs
 	{
 		-- engine
-		"%{prj.location}/src/"                     ,
-		"%{prj.location}/src/Engine/"              ,
+		"%{prj.location}/src"                     ,
+		"%{prj.location}/src/Engine"              ,
 		"%{prj.location}/src/Platform/GraphicsAPI" ,
 		"%{prj.location}/src/Platform/OS"          ,
 
 		-- 3rd party
 		(dependenciesdir .. "spdlog/include/"),
-		(dependenciesdir .. "glfw/include/"  ),
-		(dependenciesdir .. "glad/include"   ),
+		(dependenciesdir .. "GLFW/include/"  ),
+		(dependenciesdir .. "GLAD/include"   ),
 		(dependenciesdir .. "imgui/backends" ),
 		(dependenciesdir .. "imgui/"         ),
 		(dependenciesdir .. "glm/"           ),
@@ -65,6 +65,26 @@ project "Engine"
 			"dxguid.lib"      ,
 			"D3DCompiler.lib" ,
 		}
+	
+	-- linux
+	filter "system:linux"
+		defines "LIGHT_PLATFORM_LINUX"
+		
+		links
+		{
+			"dl",
+		}
+		
+		buildoptions
+		{
+			"-lgtest",
+			"-lpthread",
+		}
+		excludes
+		{
+			"%{prj.location}/src/Platform/GraphicsAPI/DirectX/**",
+			"%{prj.location}/src/Platform/OS/Windows/**",
+		}
 
 	-- debug
 	filter "configurations:Debug"
@@ -83,8 +103,7 @@ project "Engine"
 
 	--- Excludes ---
 	-- !windows
-	filter "system:not windows"
-		excludes "%{prj.location}/src/Platform/GraphicsAPI/DirectX**"
-		excludes "%{prj.location}/src/Platform/OS/Windows**"
+	filter "system:not linux"
+
 	-- !linux #todo:
 	-- !mac #todo:
\ No newline at end of file
diff --git a/Engine/src/Engine/Base.h b/Engine/src/Engine/Base.h
index e1cc347..34fa9d5 100644
--- a/Engine/src/Engine/Base.h
+++ b/Engine/src/Engine/Base.h
@@ -13,11 +13,13 @@
 #define LT_MAC(x) // Mac
 
 #if defined(LIGHT_PLATFORM_WINDOWS)
+	#error "test"
 	#define LT_BUILD_PLATFORM "Windows"
 	#define LT_WIN(x) x
 #elif defined(LIGHT_PLATFORM_LINUX)
-	#error "Unsupported platform: UNIX"
-	#define LT_LIN(x)
+	#define LT_BUILD_PLATFORM "Linux"
+	
+	#define LT_LIN(x) x
 #elif defined(LIGHT_PLATFORM_MAC)
 	#error "Unsupported platform: MAC"
 	#define LT_MAC(x) x
@@ -28,5 +30,5 @@
 #define BIT(x) 1 << x
 
 // #todo: log to file in distribution builds
-#define LT_ENGINE_ASSERT(x, ...) { if(!(x)) { LT_ENGINE_CRITICAL(__VA_ARGS__); __debugbreak(); throw ::Light::FailedAssertion(__FILE__, __LINE__); } }
-#define LT_CLIENT_ASSERT(x, ...) { if(!(x)) { LT_CLIENT_CRITICAL(__VA_ARGS__); __debugbreak(); } }
\ No newline at end of file
+#define LT_ENGINE_ASSERT(x, ...) { if(!(x)) { LT_ENGINE_CRITICAL(__VA_ARGS__); /* __builtin_trap() */; throw ::Light::FailedAssertion(__FILE__, __LINE__); } }
+#define LT_CLIENT_ASSERT(x, ...) { if(!(x)) { LT_CLIENT_CRITICAL(__VA_ARGS__); __builtin_trap(); } }
\ No newline at end of file
diff --git a/Engine/src/Engine/Debug/Logger.cpp b/Engine/src/Engine/Debug/Logger.cpp
index 5a59cb0..faec667 100644
--- a/Engine/src/Engine/Debug/Logger.cpp
+++ b/Engine/src/Engine/Debug/Logger.cpp
@@ -17,8 +17,11 @@ namespace Light {
 	void Light::Logger::Initialize()
 	{
 		// set spdlog pattern
+#if   defined(LIGHT_PLATFORM_WINDOWS)
 		spdlog::set_pattern("%^[%M:%S:%e] <%n>: %v%$");
-
+#elif defined(LIGHT_PLATFORM_LINUX)
+		spdlog::set_pattern("%^{%l} - [%M:%S:%e] <%n>: %v%$");
+#endif
 		// create loggers
 #ifndef LIGHT_DIST
 		s_EngineLogger = spdlog::stdout_color_mt("Engine");
@@ -28,7 +31,7 @@ namespace Light {
 		s_FileLogger->set_pattern("%^[%M:%S:%e] <%l>: %v%$");
 
 		// set level
-#if defined(LIGHT_DEBUG)
+#if   defined(LIGHT_DEBUG)
 		s_EngineLogger->set_level(spdlog::level::trace);
 		s_ClientLogger->set_level(spdlog::level::trace);
 #elif defined (LIGHT_RELEASE)
diff --git a/Engine/src/Engine/EntryPoint.h b/Engine/src/Engine/EntryPoint.h
index 895d09c..d97b5b8 100644
--- a/Engine/src/Engine/EntryPoint.h
+++ b/Engine/src/Engine/EntryPoint.h
@@ -7,6 +7,7 @@
 // To be defined in client project
 extern Light::Application* Light::CreateApplication();
 
+// #todo: use windows specific stuff
 int main(int argc, char** argv)
 {
 	Light::Application* application = nullptr;
@@ -39,4 +40,39 @@ int main(int argc, char** argv)
 	return exitCode;
 }
 
+#elif defined(LIGHT_PLATFORM_LINUX)
+
+#include <LightEngine.h>
+
+// To be defined in client project
+extern Light::Application* Light::CreateApplication();
+
+// #todo: use linux specific stuff
+int main(int argc, char* argv[])
+{
+	Light::Application* application = nullptr;
+	int exitCode = 0;
+
+	try
+	{
+		application = Light::CreateApplication();
+		LT_ENGINE_ASSERT(application, "main: Light::Application is not intialized");
+
+		application->GameLoop();
+	}
+	catch (Light::FailedAssertion)
+	{
+		LT_ENGINE_CRITICAL("main: exitting due to unhandled FailedAssertion");
+		exitCode = -1;
+	}
+	catch(Light::glException)
+	{
+		LT_ENGINE_CRITICAL("main: exitting due to unhandled glException");
+		exitCode = -2;
+	}
+
+	delete application;
+	return exitCode;
+}
+
 #endif
\ No newline at end of file
diff --git a/Engine/src/Engine/Events/Event.h b/Engine/src/Engine/Events/Event.h
index 7828cf1..f454c8d 100644
--- a/Engine/src/Engine/Events/Event.h
+++ b/Engine/src/Engine/Events/Event.h
@@ -24,9 +24,9 @@ namespace Light {
 		InputEventCategory = BIT(1),
 		KeyboardEventCategory = BIT(2),
 		MouseEventCategory = BIT(3),
-	};
+	}; 
 
-#define EVENT_TYPE(type) EventType GetEventType() const override { return EventType::##type; }
+#define EVENT_TYPE(type) EventType GetEventType() const override { return ::Light::EventType:: type; }
 #define EVENT_CATEGORY(eCategory) inline bool HasCategory(EventCategory category) const override { return (eCategory) & category; } 
 
 	class Event
diff --git a/Engine/src/Engine/Graphics/Buffers.cpp b/Engine/src/Engine/Graphics/Buffers.cpp
index 7649ab6..20af7ab 100644
--- a/Engine/src/Engine/Graphics/Buffers.cpp
+++ b/Engine/src/Engine/Graphics/Buffers.cpp
@@ -22,8 +22,8 @@ namespace Light {
 		case GraphicsAPI::OpenGL:
 			return new glVertexBuffer(vertices, count);
 			
-		case GraphicsAPI::DirectX: 
-			return new dxVertexBuffer(vertices, stride, count, std::static_pointer_cast<dxSharedContext>(sharedContext));
+		case GraphicsAPI::DirectX: LT_WIN(
+			return new dxVertexBuffer(vertices, stride, count, std::static_pointer_cast<dxSharedContext>(sharedContext));)
 
 		default:
 			LT_ENGINE_ASSERT(false, "VertexBuffer::Create: invalid/unsupported GraphicsAPI {}", GraphicsContext::GetGraphicsAPI());
diff --git a/Engine/src/Engine/Graphics/GraphicsContext.cpp b/Engine/src/Engine/Graphics/GraphicsContext.cpp
index 10b8867..304e9e8 100644
--- a/Engine/src/Engine/Graphics/GraphicsContext.cpp
+++ b/Engine/src/Engine/Graphics/GraphicsContext.cpp
@@ -18,6 +18,8 @@ namespace Light {
 
 	GraphicsContext* GraphicsContext::s_Context = nullptr;
 
+	GraphicsContext::~GraphicsContext() { }
+
 	GraphicsContext* GraphicsContext::Create(GraphicsAPI api, GLFWwindow* windowHandle)
 	{
 		// terminate gfx context dependent classes
diff --git a/Engine/src/Engine/Graphics/GraphicsContext.h b/Engine/src/Engine/Graphics/GraphicsContext.h
index 716ca9b..9db420b 100644
--- a/Engine/src/Engine/Graphics/GraphicsContext.h
+++ b/Engine/src/Engine/Graphics/GraphicsContext.h
@@ -42,7 +42,7 @@ namespace Light {
 		GraphicsContext(const GraphicsContext&) = delete;
 		GraphicsContext& operator=(const GraphicsContext&) = delete;
 
-		virtual ~GraphicsContext() = default;
+		virtual ~GraphicsContext();
 
 		virtual void OnWindowResize(const WindowResizedEvent& event) = 0;
 
diff --git a/Engine/src/Engine/Graphics/Renderer.cpp b/Engine/src/Engine/Graphics/Renderer.cpp
index 85e318f..ffb7692 100644
--- a/Engine/src/Engine/Graphics/Renderer.cpp
+++ b/Engine/src/Engine/Graphics/Renderer.cpp
@@ -51,19 +51,20 @@ namespace Light {
 
 		// TOP_LEFT
 		m_QuadRenderer.mapCurrent[0].position = { xMin, yMin, position.z };
-		m_QuadRenderer.mapCurrent[0].tint = tint;
+		m_QuadRenderer.mapCurrent[0].tint = glm::vec4((float)(rand() % 100) / 100.0f, (float)(rand() % 100) / 100.0f, (float)(rand() % 100) / 100.0f, 1.0f);
 
+		
 		// TOP_RIGHT
 		m_QuadRenderer.mapCurrent[1].position = { xMax, yMin, position.z };
-		m_QuadRenderer.mapCurrent[1].tint = tint;
+		m_QuadRenderer.mapCurrent[1].tint = glm::vec4((float)(rand() % 100) / 100.0f, (float)(rand() % 100) / 100.0f, (float)(rand() % 100) / 100.0f, 1.0f);
 
 		// BOTTOM_RIGHT
 		m_QuadRenderer.mapCurrent[2].position = { xMax, yMax, position.z };
-		m_QuadRenderer.mapCurrent[2].tint = tint;
+		m_QuadRenderer.mapCurrent[2].tint = glm::vec4((float)(rand() % 100) / 100.0f, (float)(rand() % 100) / 100.0f, (float)(rand() % 100) / 100.0f, 1.0f);
 
 		// BOTTOM_LEFT
 		m_QuadRenderer.mapCurrent[3].position = { xMin, yMax, position.z };
-		m_QuadRenderer.mapCurrent[3].tint = tint;
+		m_QuadRenderer.mapCurrent[3].tint = glm::vec4((float)(rand() % 100) / 100.0f, (float)(rand() % 100) / 100.0f, (float)(rand() % 100) / 100.0f, 1.0f);
 
 		// advance
 		m_QuadRenderer.mapCurrent += 4;
diff --git a/Engine/src/Engine/UserInterface/UserInterface.h b/Engine/src/Engine/UserInterface/UserInterface.h
index 50b73f6..a4669e3 100644
--- a/Engine/src/Engine/UserInterface/UserInterface.h
+++ b/Engine/src/Engine/UserInterface/UserInterface.h
@@ -15,7 +15,7 @@ namespace Light {
 		static UserInterface* Create(GLFWwindow* windowHandle, std::shared_ptr<SharedContext> sharedContext);
 
 		UserInterface(const UserInterface&) = delete;
-		UserInterface operator=(const UserInterface&) = delete;
+		UserInterface& operator=(const UserInterface&) = delete;
 
 		virtual ~UserInterface() = default;
 
diff --git a/Engine/src/Platform/GraphicsAPI/OpenGL/glGraphicsContext.cpp b/Engine/src/Platform/GraphicsAPI/OpenGL/glGraphicsContext.cpp
index 216c754..39de6ef 100644
--- a/Engine/src/Platform/GraphicsAPI/OpenGL/glGraphicsContext.cpp
+++ b/Engine/src/Platform/GraphicsAPI/OpenGL/glGraphicsContext.cpp
@@ -14,7 +14,7 @@
 #include "Utility/Stringifier.h"
 
 #include <glad/glad.h>
-#include <glfw/glfw3.h>
+#include <GLFW/glfw3.h>
 
 namespace Light {
 
@@ -24,10 +24,11 @@ namespace Light {
 		m_GraphicsAPI = GraphicsAPI::OpenGL;
 
 		glfwMakeContextCurrent(windowHandle);
-		LT_ENGINE_ASSERT(gladLoadGLLoader((GLADloadproc)glfwGetProcAddress),
-		                 "glGraphicsContext::glGraphicsContext: gladLoadGLLoader: failed to initialize opengl context");
+		
+		if(!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
+		{ exit(1); }
 
-		SetDebugMessageCallback();
+		
 	}
 
 	void glGraphicsContext::OnWindowResize(const WindowResizedEvent& event)
diff --git a/Engine/src/Platform/GraphicsAPI/OpenGL/glShader.cpp b/Engine/src/Platform/GraphicsAPI/OpenGL/glShader.cpp
index 6f470a1..8c2777c 100644
--- a/Engine/src/Platform/GraphicsAPI/OpenGL/glShader.cpp
+++ b/Engine/src/Platform/GraphicsAPI/OpenGL/glShader.cpp
@@ -36,6 +36,9 @@ namespace Light {
 			std::vector<char> errorLog(maxLength);
 			glGetShaderInfoLog(vertexShader, maxLength, &maxLength, &errorLog[0]);
 
+			for(int i = 0; i < errorLog.size() -1; i++)
+				std::cout << errorLog[i];
+
 			glDeleteShader(vertexShader);
 		}
 
diff --git a/Engine/src/Platform/OS/Windows/wWindow.cpp b/Engine/src/Platform/OS/Windows/wWindow.cpp
index 2534ee9..ba09115 100644
--- a/Engine/src/Platform/OS/Windows/wWindow.cpp
+++ b/Engine/src/Platform/OS/Windows/wWindow.cpp
@@ -24,8 +24,12 @@ namespace Light {
 		LT_ENGINE_ASSERT(glfwInit(), "wWindow::wWindow: failed to initialize glfw");
 
 		// create window
-		glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
-		m_Handle = glfwCreateWindow(1u, 1u, "", nullptr, nullptr);
+	
+		glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
+		glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
+		glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+		m_Handle = glfwCreateWindow(800u, 600u, "", nullptr, nullptr);
 
 		LT_ENGINE_ASSERT(m_Handle, "wWindow::wWindow: glfwCreateWindow: failed to create glfw window");
 
@@ -34,7 +38,7 @@ namespace Light {
 		BindGlfwEvents();
 
 		// create graphics context
-		m_GraphicsContext = std::unique_ptr<GraphicsContext>(GraphicsContext::Create(GraphicsAPI::DirectX, m_Handle));
+		m_GraphicsContext = std::unique_ptr<GraphicsContext>(GraphicsContext::Create(GraphicsAPI::OpenGL, m_Handle));
 		LT_ENGINE_ASSERT(m_GraphicsContext, "wWindow::wWindow: failed to create graphics context");
 	}
 
@@ -109,7 +113,8 @@ namespace Light {
 		glfwSetCursorPosCallback(m_Handle, [](GLFWwindow* window, double xpos, double ypos)
 		{
 			std::function<void(Event&)> callback = *(std::function<void(Event&)>*)glfwGetWindowUserPointer(window);
-			callback(MouseMovedEvent(xpos, ypos));
+			MouseMovedEvent event(xpos, ypos);
+			callback(event);
 		});
 
 		glfwSetMouseButtonCallback(m_Handle, [](GLFWwindow* window, int button, int action, int mods) 
@@ -117,15 +122,25 @@ namespace Light {
 			std::function<void(Event&)> callback = *(std::function<void(Event&)>*)glfwGetWindowUserPointer(window);
 
 			if (action == GLFW_PRESS)
-				callback(ButtonPressedEvent(button));
+			{
+				ButtonPressedEvent event(button);
+				callback(event);
+			}
+	
 			else
-				callback(ButtonReleasedEvent(button));
+			{		
+				ButtonReleasedEvent event(button);
+				callback(event);
+			}
+
 		});
 
 		glfwSetScrollCallback(m_Handle, [](GLFWwindow* window, double xoffset, double yoffset)
 		{
 			std::function<void(Event&)> callback = *(std::function<void(Event&)>*)glfwGetWindowUserPointer(window);
-			callback(WheelScrolledEvent(yoffset));
+			
+			WheelScrolledEvent event(yoffset);
+			callback(event);
 		});
 
 		// Keyboard Events //
@@ -134,28 +149,41 @@ namespace Light {
 			std::function<void(Event&)> callback = *(std::function<void(Event&)>*)glfwGetWindowUserPointer(window);
 
 			if (action == GLFW_PRESS)
-				callback(KeyPressedEvent(key));
+			{
+				KeyPressedEvent event(key);
+				callback(event);
+			}
 			else
-				callback(KeyReleasedEvent(key));
+			{
+				KeyReleasedEvent event(key);
+				callback(event);
+			}
+				
 		});
 
 		// Window Events //
 		glfwSetWindowPosCallback(m_Handle, [](GLFWwindow* window, int xpos, int ypos)
 		{
 			std::function<void(Event&)> callback = *(std::function<void(Event&)>*)glfwGetWindowUserPointer(window);
-			callback(WindowMovedEvent(xpos, ypos));
+			WindowMovedEvent event(xpos, ypos);
+			
+			callback(event);
 		});
 
 		glfwSetWindowSizeCallback(m_Handle, [](GLFWwindow* window, int width, int height) 
 		{
 			std::function<void(Event&)> callback = *(std::function<void(Event&)>*)glfwGetWindowUserPointer(window);
-			callback(WindowResizedEvent(width, height));
+			WindowResizedEvent event(width, height);
+			
+			callback(event);
 		});
 
 		glfwSetWindowCloseCallback(m_Handle, [](GLFWwindow* window)
 		{
 			std::function<void(Event&)> callback = *(std::function<void(Event&)>*)glfwGetWindowUserPointer(window);
-			callback(WindowClosedEvent());
+			WindowClosedEvent event;
+			
+			callback(event);
 		});
 
 		glfwSetWindowFocusCallback(m_Handle, [](GLFWwindow* window, int focus)
@@ -163,10 +191,15 @@ namespace Light {
 			std::function<void(Event&)> callback = *(std::function<void(Event&)>*)glfwGetWindowUserPointer(window);
 
 			if(focus == GLFW_TRUE)
-				callback(WindowGainFocusEvent());
+			{
+				WindowGainFocusEvent event;
+				callback(event);
+			}
 			else
-				callback(WindowLostFocusEvent());
-			});
+			{
+				WindowLostFocusEvent event;
+				callback(event);
+			}
+		});
 	}
-
 }
\ No newline at end of file
diff --git a/Sandbox/imgui.ini b/Sandbox/imgui.ini
index ad68c9b..7e523c2 100644
--- a/Sandbox/imgui.ini
+++ b/Sandbox/imgui.ini
@@ -4,8 +4,8 @@ Size=400,400
 Collapsed=0
 
 [Window][Dear ImGui Demo]
-Pos=-16,5
-Size=405,290
+Pos=556,321
+Size=241,281
 Collapsed=0
 
 [Window][Dear ImGui Metrics/Debugger]
diff --git a/Sandbox/premake5.lua b/Sandbox/premake5.lua
index e40641e..c33c05d 100644
--- a/Sandbox/premake5.lua
+++ b/Sandbox/premake5.lua
@@ -51,6 +51,16 @@ project "Sandbox"
 		systemversion "latest"
 		staticruntime "On"
 
+	-- linux
+	filter "system:linux"
+		defines "LIGHT_PLATFORM_LINUX"
+		
+		links
+		{
+			"dl",
+			"pthread",
+		}
+	
 	-- debug
 	filter "configurations:Debug"
 		defines "LIGHT_DEBUG"
diff --git a/Sandbox/src/SandboxApp.cpp b/Sandbox/src/SandboxApp.cpp
index af04a1e..8e686e7 100644
--- a/Sandbox/src/SandboxApp.cpp
+++ b/Sandbox/src/SandboxApp.cpp
@@ -1,5 +1,6 @@
 #define LIGHT_ENTRY_POINT
 #include <LightEngine.h>
+#include <EntryPoint.h>
 
 #include "SandboxLayer.h"