Some project structure fixes

game/CMakeLists.txt

@@ -2,8 +2,21 @@ add_executable(game
     "src/main.cpp"
 )
 
+target_compile_features(game PRIVATE cxx_std_23)
+
 target_link_libraries(game PRIVATE engine)
 
+# On Windows with dynamic linking, copy SDL3.dll next to the game executable.
+# $<TARGET_FILE_DIR:game> always resolves correctly regardless of build layout.
+if(WIN32 AND SDL_LINK_TYPE STREQUAL "dynamic")
+    add_custom_command(TARGET game POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different
+            $<TARGET_FILE:SDL3::SDL3>
+            $<TARGET_FILE_DIR:game>
+        COMMENT "Copying SDL3.dll to game output directory"
+    )
+endif()
+
 # On Windows, use the WINDOWS subsystem (no console) for release only
 if(WIN32)
     if(CMAKE_BUILD_TYPE STREQUAL "Release")