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

Game/game.h

@@ -10,12 +10,20 @@ struct World
     EntityManager* EntityManager;
 };
 
+enum class GameMode
+{
+    Play,
+    Debug
+};
+
 struct GameState
 {
     Juliet::Arena* TotalArena;
 
     World* World;
 
+    GameMode Mode = GameMode::Play;
+
     float TotalTime;
     int   Score;
 };