Using memory arena in the game that supports hot reload

Game/game.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <Core/Memory/MemoryArena.h>
+
+struct EntityManager;
+
+struct World
+{
+    Juliet::Arena* WorldArena;
+    EntityManager* EntityManager;
+};
+
+struct GameState
+{
+    Juliet::Arena* TotalArena;
+
+    World* World;
+
+    float TotalTime;
+    int   Score;
+};
+
+extern GameState* GetGameState();