upodate game start and blur on pause

src/states/PlayingState.h

@@ -14,4 +14,9 @@ public:
 private:
     // Local per-state variables if needed
     bool localPaused = false;
+    
+    // Render target for blur effect
+    SDL_Texture* m_renderTarget = nullptr;
+    int m_targetW = 0;
+    int m_targetH = 0;
 };