void Awake()
 {
     //Check if a GameManager has already been assigned to static variable GameManager.instance or if it's still null
     if (GameManager.instance == null)
     {
         //Instantiate gameManager prefab
         var obj = Instantiate(gameManager) as GameObject;
         obj.name           = "GameManager";
         manager            = obj.GetComponent <GameManager>();
         manager.ForPlanner = Planner;
         manager.seed       = seed;
         manager.numEnemies = numEnemies;
         manager.InitGame();
     }
 }