added projectile collision and some fixed

src/Game.h

@@ -87,14 +87,16 @@ namespace ZL {
 		int maxProjectiles = 32;
 		std::vector<Vector3f> shipLocalEmissionPoints;
 
-		
+
 		bool shipAlive = true;
 		bool gameOver = false;
 		std::vector<bool> boxAlive;
-		float shipCollisionRadius = 3.5f;
+		float shipCollisionRadius = 15.0f;
 		float boxCollisionRadius = 2.0f;
 		bool uiGameOverShown = false;
 		bool showExplosion = false;
+		uint64_t lastExplosionTime = 0;
+		const uint64_t explosionDurationMs = 500;
 
 	};