diff --git a/CMakeLists.txt b/CMakeLists.txt
index 04cbb07..c1e9feb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 3.16)
 project(CodingGame LANGUAGES C CXX)
 
+set(ENGINE_TARGET engine)
+
 # ---------- Build-type defaults (only affects single-config generators like Ninja/Make) ----------
 if(NOT CMAKE_CONFIGURATION_TYPES AND NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
@@ -12,7 +14,7 @@ if (UNIX)
   FetchContent_Declare(
     glm
     GIT_REPOSITORY https://github.com/g-truc/glm.git
-    GIT_TAG        bf71a834948186f4097caa076cd2663c69a10e1e # refs/tags/1.0.1
+    GIT_TAG        a532f5b1cf27d6a3c099437e6959cf7e398a0a67 # refs/tags/1.0.2
   )
   FetchContent_MakeAvailable(glm)
 
@@ -34,99 +36,5 @@ elseif (MSVC) # vcpkg
   find_package(EnTT CONFIG REQUIRED)
 endif()
 
-add_executable(CodingGame
-  src/IO/parser.cpp
-  src/IO/file_manager.cpp
-
-  src/window/window.cpp
-
-  src/components/batch.cpp
-
-  src/renderer/debug.cpp
-  src/renderer/mesh.cpp
-  src/renderer/shader.cpp
-  src/renderer/texture.cpp
-  src/renderer/wavefront.cpp
-  src/renderer/engine.cpp
-  src/renderer/renderer.cpp
-
-  src/main.cpp
-)
-
-set_property(TARGET CodingGame PROPERTY CXX_STANDARD 17)
-set_property(TARGET CodingGame PROPERTY CXX_STANDARD_REQUIRED ON)
-
-file(COPY src/shaders DESTINATION ${CMAKE_BINARY_DIR}/)
-
-target_include_directories(CodingGame PRIVATE
-  ${CMAKE_SOURCE_DIR}/include
-  ${CMAKE_SOURCE_DIR}/contrib
-)
-target_link_libraries(CodingGame PRIVATE
-  SDL3::SDL3
-  OpenGL::GL
-  GLEW::GLEW
-  glm::glm
-  EnTT::EnTT
-)
-
-# ---------- Visibility (helps optimizer & smaller binaries on Release) ----------
-# Only affects non-Windows compilers
-set_target_properties(CodingGame PROPERTIES
-  CXX_VISIBILITY_PRESET hidden
-  VISIBILITY_INLINES_HIDDEN YES
-)
-
-# ---------- Per-config flags ----------
-# Debug flags (your original intent, kept)
-if (MSVC)
-  target_compile_options(CodingGame PRIVATE $<$<CONFIG:Debug>:/Zi>)
-  target_link_options(CodingGame    PRIVATE $<$<CONFIG:Debug>:/DEBUG:FULL>)
-else()
-  target_compile_options(CodingGame PRIVATE $<$<CONFIG:Debug>:-ggdb>)
-endif()
-
-# Release flags
-if (MSVC)
-  # /O2: optimize speed, /GL: whole program opt (LTCG), /DNDEBUG: disable asserts
-  target_compile_options(CodingGame PRIVATE
-    $<$<CONFIG:Release>:/O2>
-    $<$<CONFIG:Release>:/DNDEBUG>
-    $<$<CONFIG:RelWithDebInfo>:/O2>
-  )
-  # Link-time codegen & extra linker opts for smaller/faster binaries
-  target_link_options(CodingGame PRIVATE
-    $<$<CONFIG:Release>:/LTCG /OPT:ICF /OPT:REF>
-    $<$<CONFIG:RelWithDebInfo>:/LTCG /OPT:ICF /OPT:REF>
-  )
-else()
-  # GCC/Clang
-  # -O3 for max opts, -ffast-math optional but can be risky; we keep it OFF by default.
-  option(CODINGGAME_USE_MARCH_NATIVE "Enable -march=native on Release for this machine" ON)
-  target_compile_options(CodingGame PRIVATE
-    $<$<CONFIG:Release>:-O3>
-    $<$<AND:$<CONFIG:Release>,$<BOOL:${CODINGGAME_USE_MARCH_NATIVE}>>:-march=native>
-    $<$<CONFIG:Release>:-DNDEBUG>
-    $<$<CONFIG:RelWithDebInfo>:-O3 -g>
-  )
-  # Linker: enable LTO when available; optionally strip symbols on non-Apple
-  include(CheckIPOSupported)  # IPO == LTO in CMake terms
-  check_ipo_supported(RESULT ipo_supported OUTPUT ipo_msg)
-  if(ipo_supported)
-    set_property(TARGET CodingGame PROPERTY INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE)
-    set_property(TARGET CodingGame PROPERTY INTERPROCEDURAL_OPTIMIZATION_RELWITHDEBINFO TRUE)
-  endif()
-
-  if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND NOT APPLE)
-    # -s strips symbols at link stage (use only for pure Release)
-    target_link_options(CodingGame PRIVATE $<$<CONFIG:Release>:-s>)
-  endif()
-endif()
-
-# ---------- Windows: copy runtime DLLs ----------
-if (WIN32)
-  add_custom_command(TARGET CodingGame POST_BUILD
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different
-      $<TARGET_RUNTIME_DLLS:CodingGame> $<TARGET_FILE_DIR:CodingGame>
-    COMMAND_EXPAND_LISTS)
-endif()
\ No newline at end of file
+add_subdirectory(engine)
+add_subdirectory(sandbox)
diff --git a/engine/CMakeLists.txt b/engine/CMakeLists.txt
new file mode 100644
index 0000000..e880d76
--- /dev/null
+++ b/engine/CMakeLists.txt
@@ -0,0 +1,102 @@
+option(ENGINE_BUILD_SHARED "Build the Engine library as a shared library" ON)
+
+set(SOURCES
+  src/IO/parser.cpp
+  src/IO/file_manager.cpp
+
+  src/window/window.cpp
+
+  src/components/batch.cpp
+
+  src/renderer/debug.cpp
+  src/renderer/mesh.cpp
+  src/renderer/shader.cpp
+  src/renderer/texture.cpp
+  src/renderer/wavefront.cpp
+  src/renderer/core.cpp
+  src/renderer/renderer.cpp
+
+  # src/main.cpp
+)
+
+#if (ENGINE_BUILD_SHARED)
+#  add_library(${ENGINE_TARGET} SHARED ${SOURCES})
+#else()
+#  add_library(${ENGINE_TARGET} STATIC ${SOURCES})
+#endif()
+
+if(ENGINE_BUILD_SHARED)
+  add_library(${ENGINE_TARGET} SHARED ${SOURCES})
+  if(WIN32)
+    target_compile_definitions(${ENGINE_TARGET} PRIVATE ENGINE_BUILD_SHARED ENGINE_EXPORTS)
+  else()
+    target_compile_definitions(${ENGINE_TARGET} PRIVATE ENGINE_BUILD_SHARED)
+  endif()
+else()
+  add_library(${ENGINE_TARGET} STATIC ${SOURCES})
+  target_compile_definitions(${ENGINE_TARGET} PRIVATE ENGINE_STATIC)
+endif()
+
+set_target_properties(${ENGINE_TARGET} PROPERTIES
+  CXX_STANDARD 17
+  CXX_STANDARD_REQUIRED ON
+  CXX_VISIBILITY_PRESET hidden
+  VISIBILITY_INLINES_HIDDEN YES
+)
+
+target_include_directories(${ENGINE_TARGET} PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/include
+  ${CMAKE_CURRENT_SOURCE_DIR}/contrib
+)
+target_link_libraries(${ENGINE_TARGET} PUBLIC
+  SDL3::SDL3
+  OpenGL::GL
+  GLEW::GLEW
+  glm::glm
+  EnTT::EnTT
+)
+
+if (MSVC)
+  target_compile_options(${ENGINE_TARGET} PRIVATE $<$<CONFIG:Debug>:/Zi>)
+  target_link_options(${ENGINE_TARGET}    PRIVATE $<$<CONFIG:Debug>:/DEBUG:FULL>)
+else()
+  target_compile_options(${ENGINE_TARGET} PRIVATE $<$<CONFIG:Debug>:-ggdb>)
+endif()
+
+# Release flags
+if (MSVC)
+  # /O2: optimize speed, /GL: whole program opt (LTCG), /DNDEBUG: disable asserts
+  target_compile_options(${ENGINE_TARGET} PRIVATE
+    $<$<CONFIG:Release>:/O2>
+    $<$<CONFIG:Release>:/DNDEBUG>
+    $<$<CONFIG:RelWithDebInfo>:/O2>
+  )
+  # Link-time codegen & extra linker opts for smaller/faster binaries
+  target_link_options(${ENGINE_TARGET} PRIVATE
+    $<$<CONFIG:Release>:/LTCG /OPT:ICF /OPT:REF>
+    $<$<CONFIG:RelWithDebInfo>:/LTCG /OPT:ICF /OPT:REF>
+  )
+else()
+  # GCC/Clang
+  # -O3 for max opts, -ffast-math optional but can be risky; we keep it OFF by default.
+  option(CODINGGAME_USE_MARCH_NATIVE "Enable -march=native on Release for this machine" ON)
+  target_compile_options(${ENGINE_TARGET} PRIVATE
+    $<$<CONFIG:Release>:-O3>
+    $<$<AND:$<CONFIG:Release>,$<BOOL:${CODINGGAME_USE_MARCH_NATIVE}>>:-march=native>
+    $<$<CONFIG:Release>:-DNDEBUG>
+    $<$<CONFIG:RelWithDebInfo>:-O3 -g>
+  )
+  # Linker: enable LTO when available; optionally strip symbols on non-Apple
+  include(CheckIPOSupported)  # IPO == LTO in CMake terms
+  check_ipo_supported(RESULT ipo_supported OUTPUT ipo_msg)
+  if(ipo_supported)
+    set_property(TARGET ${ENGINE_TARGET} PROPERTY INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE)
+    set_property(TARGET ${ENGINE_TARGET} PROPERTY INTERPROCEDURAL_OPTIMIZATION_RELWITHDEBINFO TRUE)
+  endif()
+
+  if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND NOT APPLE)
+    # -s strips symbols at link stage (use only for pure Release)
+    target_link_options(${ENGINE_TARGET} PRIVATE $<$<CONFIG:Release>:-s>)
+  endif()
+endif()
+
diff --git a/contrib/stb_image.h b/engine/contrib/stb_image.h
similarity index 100%
rename from contrib/stb_image.h
rename to engine/contrib/stb_image.h
diff --git a/include/IO/file_manager.h b/engine/include/engine/IO/file_manager.h
similarity index 100%
rename from include/IO/file_manager.h
rename to engine/include/engine/IO/file_manager.h
diff --git a/include/IO/parser.h b/engine/include/engine/IO/parser.h
similarity index 100%
rename from include/IO/parser.h
rename to engine/include/engine/IO/parser.h
diff --git a/include/app/app.h b/engine/include/engine/app/app.h
similarity index 77%
rename from include/app/app.h
rename to engine/include/engine/app/app.h
index 00646c6..f57b6fa 100644
--- a/include/app/app.h
+++ b/engine/include/engine/app/app.h
@@ -1,7 +1,10 @@
 #ifndef APPLICATION_H_
 #define APPLICATION_H_
 
-class IApplication {
+#include "engine/window/events/window.h"
+#include "engine/export.h"
+
+class ENGINE_API IApplication {
 public:
     virtual ~IApplication() = default;
 
diff --git a/include/components/batch.h b/engine/include/engine/components/batch.h
similarity index 84%
rename from include/components/batch.h
rename to engine/include/engine/components/batch.h
index 55f11a6..efc2f55 100644
--- a/include/components/batch.h
+++ b/engine/include/engine/components/batch.h
@@ -1,10 +1,11 @@
 #ifndef COMPONENT_BATCH_H_
 #define COMPONENT_BATCH_H_
 
-#include "renderer/renderer.h"
+#include "engine/renderer/renderer.h"
+#include "engine/export.h"
 
 // requires mesh component
-struct batch {
+struct ENGINE_API batch {
     friend class Renderer;
 public:
     // requires transform component
diff --git a/include/components/camera.h b/engine/include/engine/components/camera.h
similarity index 61%
rename from include/components/camera.h
rename to engine/include/engine/components/camera.h
index 5f56021..1dcf7aa 100644
--- a/include/components/camera.h
+++ b/engine/include/engine/components/camera.h
@@ -1,6 +1,8 @@
 #ifndef COMPONENTS_PLAYER_H_
 #define COMPONENTS_PLAYER_H_
 
-struct camera {};
+#include "engine/export.h"
+
+struct ENGINE_API camera {};
 
 #endif // COMPONENTS_PLAYER_H_
\ No newline at end of file
diff --git a/include/components/light.h b/engine/include/engine/components/light.h
similarity index 84%
rename from include/components/light.h
rename to engine/include/engine/components/light.h
index 493dc77..a22187c 100644
--- a/include/components/light.h
+++ b/engine/include/engine/components/light.h
@@ -2,9 +2,11 @@
 #define COMPONENTS_LIGHT_H_
 
 #include <glm/glm.hpp>
-#include "renderer/renderer.h"
 
-struct light {
+#include "engine/renderer/renderer.h"
+#include "engine/export.h"
+
+struct ENGINE_API light {
     friend class Renderer;
 public:
     enum LightType {
diff --git a/include/components/mesh.h b/engine/include/engine/components/mesh.h
similarity index 60%
rename from include/components/mesh.h
rename to engine/include/engine/components/mesh.h
index 08c64e5..ba40534 100644
--- a/include/components/mesh.h
+++ b/engine/include/engine/components/mesh.h
@@ -2,9 +2,11 @@
 #define COMPONENTS_MESH_H_
 
 #include <memory>
-#include "renderer/wavefront.h"
 
-struct mesh {
+#include "engine/renderer/wavefront.h"
+#include "engine/export.h"
+
+struct ENGINE_API mesh {
     std::shared_ptr<Object> object;
 };
 
diff --git a/include/components/rotate.h b/engine/include/engine/components/rotate.h
similarity index 60%
rename from include/components/rotate.h
rename to engine/include/engine/components/rotate.h
index ca5f5f4..6057922 100644
--- a/include/components/rotate.h
+++ b/engine/include/engine/components/rotate.h
@@ -1,6 +1,8 @@
 #ifndef COMPONENT_ROTATE_H_
 #define COMPONENT_ROTATE_H_
 
-struct rotate {};
+#include "engine/export.h"
+
+struct ENGINE_API rotate {};
 
 #endif // COMPONENT_ROTATE_H_
\ No newline at end of file
diff --git a/include/components/transform.h b/engine/include/engine/components/transform.h
similarity index 77%
rename from include/components/transform.h
rename to engine/include/engine/components/transform.h
index 87b6b26..a551e5d 100644
--- a/include/components/transform.h
+++ b/engine/include/engine/components/transform.h
@@ -2,8 +2,9 @@
 #define COMPONENTS_TRANSFORM_H_
 
 #include <glm/glm.hpp>
+#include "engine/export.h"
 
-struct transform {
+struct ENGINE_API transform {
     glm::vec3 position;
     glm::vec3 rotation;
     glm::vec3 scale;
diff --git a/engine/include/engine/engine.h b/engine/include/engine/engine.h
new file mode 100644
index 0000000..c533939
--- /dev/null
+++ b/engine/include/engine/engine.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <memory>
+
+#ifdef _WIN32
+#include <corecrt_math_defines.h>
+#endif
+
+#include "engine/app/app.h"
+#include "engine/renderer/core.h"
+
+extern IApplication* CreateApplication();
+
+int main() {
+    Engine::Run(std::unique_ptr<IApplication>(CreateApplication()));
+    return 0;
+}
\ No newline at end of file
diff --git a/engine/include/engine/export.h b/engine/include/engine/export.h
new file mode 100644
index 0000000..6dba46c
--- /dev/null
+++ b/engine/include/engine/export.h
@@ -0,0 +1,20 @@
+#pragma once
+
+// For static libs, ENGINE_API should be empty.
+#if defined(_WIN32)
+  #if defined(ENGINE_BUILD_SHARED)
+    #if defined(ENGINE_EXPORTS)
+      #define ENGINE_API __declspec(dllexport)
+    #else
+      #define ENGINE_API __declspec(dllimport)
+    #endif
+  #else
+    #define ENGINE_API
+  #endif
+#else
+  #if defined(ENGINE_BUILD_SHARED)
+    #define ENGINE_API __attribute__((visibility("default")))
+  #else
+    #define ENGINE_API
+  #endif
+#endif
\ No newline at end of file
diff --git a/include/renderer/basics.h b/engine/include/engine/renderer/basics.h
similarity index 92%
rename from include/renderer/basics.h
rename to engine/include/engine/renderer/basics.h
index 1a7e7d1..f1a7301 100644
--- a/include/renderer/basics.h
+++ b/engine/include/engine/renderer/basics.h
@@ -3,7 +3,7 @@
 
 #include <glm/glm.hpp>
 
-#include "renderer/mesh.h"
+#include "engine/renderer/mesh.h"
 
 class Vertex {
     friend class Mesh;
diff --git a/include/renderer/engine.h b/engine/include/engine/renderer/core.h
similarity index 65%
rename from include/renderer/engine.h
rename to engine/include/engine/renderer/core.h
index 466b855..134f1ce 100644
--- a/include/renderer/engine.h
+++ b/engine/include/engine/renderer/core.h
@@ -4,12 +4,13 @@
 #include <memory>
 #include <glm/glm.hpp>
 
-#include "window/window.h"
-#include "window/events/window.h"
+#include "engine/window/window.h"
+#include "engine/window/events/window.h"
 
-#include "app/app.h"
+#include "engine/app/app.h"
+#include "engine/export.h"
 
-class Engine {
+class ENGINE_API Engine {
 public:
     static void Run(std::unique_ptr<IApplication> app);
 private:
diff --git a/include/renderer/debug.h b/engine/include/engine/renderer/debug.h
similarity index 100%
rename from include/renderer/debug.h
rename to engine/include/engine/renderer/debug.h
diff --git a/include/renderer/material.h b/engine/include/engine/renderer/material.h
similarity index 97%
rename from include/renderer/material.h
rename to engine/include/engine/renderer/material.h
index 57b84fe..2dda85e 100644
--- a/include/renderer/material.h
+++ b/engine/include/engine/renderer/material.h
@@ -4,7 +4,7 @@
 #include <glm/glm.hpp>
 #include <memory>
 
-#include "texture.h"
+#include "engine/renderer/texture.h"
 
 class Material {
 private:
diff --git a/include/renderer/mesh.h b/engine/include/engine/renderer/mesh.h
similarity index 93%
rename from include/renderer/mesh.h
rename to engine/include/engine/renderer/mesh.h
index cc2e506..9c9a912 100644
--- a/include/renderer/mesh.h
+++ b/engine/include/engine/renderer/mesh.h
@@ -5,7 +5,7 @@
 #include <string>
 #include <GL/glew.h>
 
-#include "renderer/basics.h"
+#include "engine/renderer/basics.h"
 
 class Mesh {
 public: // TODO: abstract away
diff --git a/include/renderer/renderer.h b/engine/include/engine/renderer/renderer.h
similarity index 87%
rename from include/renderer/renderer.h
rename to engine/include/engine/renderer/renderer.h
index 79946ce..8e38900 100644
--- a/include/renderer/renderer.h
+++ b/engine/include/engine/renderer/renderer.h
@@ -4,10 +4,11 @@
 #include <glm/glm.hpp>
 #include <entt/entity/registry.hpp>
 
-#include "renderer/shader.h"
+#include "engine/renderer/shader.h"
+#include "engine/export.h"
 
 // TODO: make static or singleton
-class Renderer {
+class ENGINE_API Renderer {
 public:
     Renderer(entt::registry& registry);
 
diff --git a/include/renderer/shader.h b/engine/include/engine/renderer/shader.h
similarity index 96%
rename from include/renderer/shader.h
rename to engine/include/engine/renderer/shader.h
index e5f0639..251ad9e 100644
--- a/include/renderer/shader.h
+++ b/engine/include/engine/renderer/shader.h
@@ -5,7 +5,9 @@
 
 #include <glm/glm.hpp>
 
-class Shader
+#include "engine/export.h"
+
+class ENGINE_API Shader
 {
 public:
     Shader();
diff --git a/include/renderer/texture.h b/engine/include/engine/renderer/texture.h
similarity index 100%
rename from include/renderer/texture.h
rename to engine/include/engine/renderer/texture.h
diff --git a/include/renderer/wavefront.h b/engine/include/engine/renderer/wavefront.h
similarity index 86%
rename from include/renderer/wavefront.h
rename to engine/include/engine/renderer/wavefront.h
index 2ee0081..70dd22d 100644
--- a/include/renderer/wavefront.h
+++ b/engine/include/engine/renderer/wavefront.h
@@ -7,15 +7,17 @@
 #include <glm/glm.hpp>
 #include <memory>
 
-#include "shader.h"
-#include "renderer/renderer.h"
-#include "renderer/material.h"
-#include "renderer/mesh.h"
+#include "engine/renderer/shader.h"
+#include "engine/renderer/renderer.h"
+#include "engine/renderer/material.h"
+#include "engine/renderer/mesh.h"
+
+#include "engine/export.h"
 
 enum ObjElement { OHASH, MTLLIB, USEMTL, O, V, VN, VT, F, OUNKNOWN };
 enum MtlElement { MHASH, NEWMTL, NS, KA, KS, KD, NI, D, ILLUM, MAP_KD, MAP_KA, MUNKNOWN };
 
-class Object {
+class ENGINE_API Object {
     friend class Renderer;
 private:
     static inline int NormalizeIndex(int idx, int baseCount);
diff --git a/include/window/event.h b/engine/include/engine/window/event.h
similarity index 100%
rename from include/window/event.h
rename to engine/include/engine/window/event.h
diff --git a/include/window/events/window.h b/engine/include/engine/window/events/window.h
similarity index 100%
rename from include/window/events/window.h
rename to engine/include/engine/window/events/window.h
diff --git a/include/window/window.h b/engine/include/engine/window/window.h
similarity index 97%
rename from include/window/window.h
rename to engine/include/engine/window/window.h
index 7d562a4..282946c 100644
--- a/include/window/window.h
+++ b/engine/include/engine/window/window.h
@@ -3,7 +3,7 @@
 #include <SDL3/SDL.h>
 #include <memory>
 
-#include "event.h"
+#include "engine/window/event.h"
 
 #define ENGINE_GL_MAJOR_VERSION 4
 #define ENGINE_GL_MINOR_VERSION 6
diff --git a/src/IO/file_manager.cpp b/engine/src/IO/file_manager.cpp
similarity index 94%
rename from src/IO/file_manager.cpp
rename to engine/src/IO/file_manager.cpp
index 745f7cc..6e7255b 100644
--- a/src/IO/file_manager.cpp
+++ b/engine/src/IO/file_manager.cpp
@@ -1,4 +1,4 @@
-#include "IO/file_manager.h"
+#include "engine/IO/file_manager.h"
 
 #include <fstream>
 #include <iostream>
diff --git a/src/IO/parser.cpp b/engine/src/IO/parser.cpp
similarity index 99%
rename from src/IO/parser.cpp
rename to engine/src/IO/parser.cpp
index 4d59c64..4a02b83 100644
--- a/src/IO/parser.cpp
+++ b/engine/src/IO/parser.cpp
@@ -2,7 +2,7 @@
 #include <cstdlib>    // for strtof (fallback)
 #include <cstring>
 
-#include "IO/parser.h"
+#include "engine/IO/parser.h"
 
 // Skip whitespace
 void Parser::SkipSpaces() {
diff --git a/src/components/batch.cpp b/engine/src/components/batch.cpp
similarity index 92%
rename from src/components/batch.cpp
rename to engine/src/components/batch.cpp
index c0e9301..632c643 100644
--- a/src/components/batch.cpp
+++ b/engine/src/components/batch.cpp
@@ -1,6 +1,6 @@
 #include <GL/glew.h>
 
-#include "components/batch.h"
+#include "engine/components/batch.h"
 
 unsigned int batch::LastID = 0;
 
diff --git a/src/renderer/engine.cpp b/engine/src/renderer/core.cpp
similarity index 88%
rename from src/renderer/engine.cpp
rename to engine/src/renderer/core.cpp
index ab25987..e8564f2 100644
--- a/src/renderer/engine.cpp
+++ b/engine/src/renderer/core.cpp
@@ -1,9 +1,9 @@
 #include <memory>
 
-#include "renderer/engine.h"
-#include "window/event.h"
+#include "engine/renderer/core.h"
+#include "engine/window/event.h"
 
-#include "renderer/wavefront.h"
+#include "engine/renderer/wavefront.h"
 
 std::unique_ptr<IApplication> Engine::s_app = nullptr;
 std::shared_ptr<Window> Engine::s_window = nullptr;
diff --git a/src/renderer/debug.cpp b/engine/src/renderer/debug.cpp
similarity index 98%
rename from src/renderer/debug.cpp
rename to engine/src/renderer/debug.cpp
index 281962e..c9c4e61 100644
--- a/src/renderer/debug.cpp
+++ b/engine/src/renderer/debug.cpp
@@ -1,4 +1,4 @@
-#include "renderer/debug.h"
+#include "engine/renderer/debug.h"
 
 #include <iostream>
 
diff --git a/src/renderer/mesh.cpp b/engine/src/renderer/mesh.cpp
similarity index 98%
rename from src/renderer/mesh.cpp
rename to engine/src/renderer/mesh.cpp
index ee02817..f453f32 100644
--- a/src/renderer/mesh.cpp
+++ b/engine/src/renderer/mesh.cpp
@@ -1,6 +1,6 @@
 #include <cstddef>
 
-#include "renderer/mesh.h"
+#include "engine/renderer/mesh.h"
 
 Mesh::Mesh() {
     m_vao = 0;
diff --git a/src/renderer/renderer.cpp b/engine/src/renderer/renderer.cpp
similarity index 93%
rename from src/renderer/renderer.cpp
rename to engine/src/renderer/renderer.cpp
index 7c8e9bd..a1fd91a 100644
--- a/src/renderer/renderer.cpp
+++ b/engine/src/renderer/renderer.cpp
@@ -1,23 +1,22 @@
 #include <iostream>
-#include <cassert>
 #include <glm/glm.hpp>
 #include <glm/ext/matrix_clip_space.hpp>
-#ifdef WIN32
+#ifdef _WIN32
 #include <corecrt_math_defines.h>
 #endif
 #include <glm/ext/matrix_transform.hpp>
 #define GLM_ENABLE_EXPERIMENTAL
 #include <glm/gtx/euler_angles.hpp>
 
-#include "renderer/renderer.h"
-#include "window/window.h"
-#include "IO/file_manager.h"
+#include "engine/renderer/renderer.h"
+#include "engine/window/window.h"
+#include "engine/IO/file_manager.h"
 
-#include "components/transform.h"
-#include "components/camera.h"
-#include "components/light.h"
-#include "components/mesh.h"
-#include "components/batch.h"
+#include "engine/components/transform.h"
+#include "engine/components/camera.h"
+#include "engine/components/light.h"
+#include "engine/components/mesh.h"
+#include "engine/components/batch.h"
 
 Renderer::Renderer(entt::registry& registry) : m_registry(registry)
 {
@@ -29,13 +28,13 @@ Renderer::Renderer(entt::registry& registry) : m_registry(registry)
     );
 
     m_shader.init(
-        FileManager::read("./src/shaders/main.vs"),
-        FileManager::read("./src/shaders/pbr.fs")
+        FileManager::read("./engine/src/shaders/main.vs"),
+        FileManager::read("./engine/src/shaders/pbr.fs")
     );
 
     m_depthShader.init(
-        FileManager::read("./src/shaders/depth.vs"),
-        FileManager::read("./src/shaders/depth.fs")
+        FileManager::read("./engine/src/shaders/depth.vs"),
+        FileManager::read("./engine/src/shaders/depth.fs")
     );
 
     m_model = glm::mat4(1.f);
diff --git a/src/renderer/shader.cpp b/engine/src/renderer/shader.cpp
similarity index 99%
rename from src/renderer/shader.cpp
rename to engine/src/renderer/shader.cpp
index ed58acb..4f33a68 100644
--- a/src/renderer/shader.cpp
+++ b/engine/src/renderer/shader.cpp
@@ -1,6 +1,6 @@
 #include <iostream>
 #include <GL/glew.h>
-#include "renderer/shader.h"
+#include "engine/renderer/shader.h"
 
 Shader::Shader()
 {
diff --git a/src/renderer/texture.cpp b/engine/src/renderer/texture.cpp
similarity index 96%
rename from src/renderer/texture.cpp
rename to engine/src/renderer/texture.cpp
index 8b67ca4..04539c8 100644
--- a/src/renderer/texture.cpp
+++ b/engine/src/renderer/texture.cpp
@@ -2,7 +2,7 @@
 #include <memory>
 
 #include <GL/glew.h>
-#include "renderer/texture.h"
+#include "engine/renderer/texture.h"
 
 #define STB_IMAGE_IMPLEMENTATION
 #include "stb_image.h"
diff --git a/src/renderer/wavefront.cpp b/engine/src/renderer/wavefront.cpp
similarity index 99%
rename from src/renderer/wavefront.cpp
rename to engine/src/renderer/wavefront.cpp
index 731b48d..cd5effd 100644
--- a/src/renderer/wavefront.cpp
+++ b/engine/src/renderer/wavefront.cpp
@@ -5,9 +5,9 @@
 #include <filesystem>
 #include <GL/glew.h>
 
-#include "IO/parser.h"
-#include "renderer/mesh.h"
-#include "renderer/wavefront.h"
+#include "engine/IO/parser.h"
+#include "engine/renderer/mesh.h"
+#include "engine/renderer/wavefront.h"
 
 #define DEFAULT_MATERIAL_NAME "default"
 
diff --git a/src/shaders/depth.fs b/engine/src/shaders/depth.fs
similarity index 100%
rename from src/shaders/depth.fs
rename to engine/src/shaders/depth.fs
diff --git a/src/shaders/depth.vs b/engine/src/shaders/depth.vs
similarity index 100%
rename from src/shaders/depth.vs
rename to engine/src/shaders/depth.vs
diff --git a/src/shaders/main.vs b/engine/src/shaders/main.vs
similarity index 100%
rename from src/shaders/main.vs
rename to engine/src/shaders/main.vs
diff --git a/src/shaders/pbr.fs b/engine/src/shaders/pbr.fs
similarity index 100%
rename from src/shaders/pbr.fs
rename to engine/src/shaders/pbr.fs
diff --git a/src/window/window.cpp b/engine/src/window/window.cpp
similarity index 91%
rename from src/window/window.cpp
rename to engine/src/window/window.cpp
index 54cf89c..ba66723 100644
--- a/src/window/window.cpp
+++ b/engine/src/window/window.cpp
@@ -1,12 +1,12 @@
 #include <SDL3/SDL.h>
 
-#include "window/window.h"
-#include "window/events/window.h"
+#include "engine/window/window.h"
+#include "engine/window/events/window.h"
 
 #include <iostream>
 #include <GL/glew.h>
 
-#include "renderer/debug.h"
+#include "engine/renderer/debug.h"
 
 std::shared_ptr<Window> Window::s_instance = nullptr;
 
@@ -31,6 +31,8 @@ Window::Window(const char* title, int width, int height) {
     }
 
     SDL_SetWindowRelativeMouseMode(m_handle, true);
+    SDL_Rect boundaries = {0, 0, m_width, m_height};
+    SDL_SetWindowMouseRect(m_handle, &boundaries);
 
     m_context = SDL_GL_CreateContext(m_handle);
 
@@ -121,6 +123,9 @@ void Window::ProcessEvents() {
                         width,
                         height);
                     Dispatch(WindowResized{ m_width, m_height });
+                    SDL_SetWindowRelativeMouseMode(m_handle, true);
+                    SDL_Rect boundaries = {0, 0, m_width, m_height};
+                    SDL_SetWindowMouseRect(m_handle, &boundaries);
                 }
                 break;
             default: break;
diff --git a/sandbox/CMakeLists.txt b/sandbox/CMakeLists.txt
new file mode 100644
index 0000000..a6be27e
--- /dev/null
+++ b/sandbox/CMakeLists.txt
@@ -0,0 +1,19 @@
+set(SANDBOX_TARGET sandbox)
+
+add_executable(${SANDBOX_TARGET} src/main.cpp)
+
+set_target_properties(${SANDBOX_TARGET} PROPERTIES
+  CXX_STANDARD 17
+  CXX_STANDARD_REQUIRED ON
+)
+
+target_link_libraries(${SANDBOX_TARGET} PRIVATE ${ENGINE_TARGET})
+
+# --- Copy engine.dll and all dependent DLLs next to sandbox.exe ---
+if (WIN32)
+    add_custom_command(TARGET ${SANDBOX_TARGET} POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different
+        $<TARGET_RUNTIME_DLLS:${SANDBOX_TARGET}> $<TARGET_FILE_DIR:${SANDBOX_TARGET}>
+        COMMAND_EXPAND_LISTS
+    )
+endif()
diff --git a/src/main.cpp b/sandbox/src/main.cpp
similarity index 90%
rename from src/main.cpp
rename to sandbox/src/main.cpp
index 69298a3..8caf6cc 100644
--- a/src/main.cpp
+++ b/sandbox/src/main.cpp
@@ -1,30 +1,26 @@
-#ifndef WIN32
-#define GLEW_STATIC
-#endif
-
 #include <iostream>
-#include <memory>
 
-#ifdef WIN32
-#include <corecrt_math_defines.h>
-#endif
 #include <glm/glm.hpp>
-#include <glm/ext/matrix_clip_space.hpp>
-#include <glm/ext/matrix_transform.hpp>
+#include <glm/gtc/constants.hpp>
 
-#include "renderer/shader.h"
-#include "renderer/wavefront.h"
-#include "renderer/engine.h"
-#include "renderer/renderer.h"
+#ifdef _WIN32
+#define GLM_ENABLE_EXPERIMENTAL
+#include <glm/gtx/extended_min_max.hpp>
+#endif
 
-#include "IO/file_manager.h"
+#include "engine/renderer/wavefront.h"
+#include "engine/renderer/renderer.h"
 
-#include "components/transform.h"
-#include "components/light.h"
-#include "components/camera.h"
-#include "components/mesh.h"
-#include "components/rotate.h"
-#include "components/batch.h"
+#include "engine/app/app.h"
+
+#include "engine/components/transform.h"
+#include "engine/components/light.h"
+#include "engine/components/camera.h"
+#include "engine/components/mesh.h"
+#include "engine/components/rotate.h"
+#include "engine/components/batch.h"
+
+#include "engine/engine.h"
 
 class Game : public IApplication {
 public:
@@ -39,18 +35,18 @@ public:
         m_registry.emplace<transform>(cameraEntity, glm::vec3(0.f, 2.f, 2.f));
         m_registry.emplace<camera>(cameraEntity);
 
-        Object* targetObj = Object::LoadFile("./assets/wizard/wizard.obj");
+        Object* targetObj = Object::LoadFile("./assets/monkey.obj");
         const auto targetEntity = m_registry.create();
         m_registry.emplace<transform>(targetEntity, glm::vec3(0.f, 0.0f, 0.f));
         m_registry.emplace<mesh>(targetEntity, std::shared_ptr<Object>(targetObj));
 
-        Object* grass = Object::LoadFile("./assets/grass_block/grass_block.obj");
+        Object* grass = Object::LoadFile("./assets/cube.obj");
         const auto cubeEntity = m_registry.create();
         m_registry.emplace<transform>(cubeEntity, glm::vec3(-1.5f, 0.4f, 0.f));
         m_registry.emplace<mesh>(cubeEntity, std::shared_ptr<Object>(grass));
 
         // Cube template (use shared object to avoid reloading 1000 times)
-        std::shared_ptr<Object> cubeObj = std::shared_ptr<Object>(Object::LoadFile("./assets/grass_block/grass_block.obj"));
+        std::shared_ptr<Object> cubeObj = std::shared_ptr<Object>(Object::LoadFile("./assets/cube.obj"));
         const auto batchEntt = m_registry.create();
         m_registry.emplace<batch>(batchEntt);
         m_registry.emplace<mesh>(batchEntt, cubeObj);
@@ -166,7 +162,7 @@ public:
         glm::vec3 sunDir = glm::normalize(glm::vec3(0.0f, sin(sunAngle), cos(sunAngle)));
 
         // Compute intensity: bright at noon, dim at dusk/dawn, dark at night
-        float intensity = glm::max(sin(sunAngle), (double)0.0f); // 0 at night, 1 at noon
+        float intensity = glm::max(static_cast<double>(sin(sunAngle)), static_cast<double>(0.0f)); // 0 at night, 1 at noon
         intensity = glm::mix(0.05f, 1.5f, intensity);    // keep some ambient even at night
 
         // Optional: tint color (warm at sunrise/sunset)
@@ -232,7 +228,6 @@ private:
     Uint64 m_currentTicks;
 };
 
-int main() {
-    Engine::Run(std::make_unique<Game>());
-    return 0;
-}
\ No newline at end of file
+IApplication* CreateApplication() {
+    return new Game();
+}