public void StartGame()
 {
     if (isGameOver)
     {
         GameObject[] enemies = GameObject.FindGameObjectsWithTag("Enemy");
         foreach (GameObject enemy in enemies)
         {
             Destroy(enemy);
         }
         HideStartCanvas();
         ShowInGameCanvas();
         playerVal.initStartGame();
         isGameOver = false;
     }
     else
     {
         HideStartCanvas();
         ShowInGameCanvas();
         playerVal.initStartGame();
     }
     gameController.BeginCalculations();
 }