Support of IsKeyPressed that only trigger for the frame it is pressed on.

Game/game.cpp

@@ -5,13 +5,16 @@
 
 #include <game.h>
 
+#include <Core/Common/EnumUtils.h>
 #include <Core/HAL/Filesystem/Filesystem.h>
+#include <Core/HAL/Keyboard/Keyboard.h>
 #include <Core/JulietInit.h>
 #include <Core/Logging/LogManager.h>
 #include <Core/Memory/MemoryArena.h>
 #include <Entity/Entity.h>
 #include <Entity/EntityManager.h>
 #include <Graphics/Camera.h>
+#include <imgui.h>
 
 GameState* gGameState = nullptr;
 GameState* GetGameState()
@@ -92,5 +95,19 @@ extern "C" JULIET_API void __cdecl GameUpdate(Juliet::GameData* params, [[maybe_
         printf("Rock has %d health points\n", rock->Health);
     }
 
-    // printf("Updating game...\n");
+    if (IsKeyPressed(ScanCode::F1))
+    {
+        gGameState->Mode = static_cast<GameMode>((ToUnderlying(gGameState->Mode) + 1) % 2);
+    }
+
+    if (gGameState->Mode == GameMode::Play)
+    {
+        // update game
+    }
+
+    if (gGameState->Mode == GameMode::Debug)
+    {
+        ImGui::Begin("Debug");
+        ImGui::End();
+    }
 }