void Update ()  
  {
   if (Input.GetMouseButtonDown (0))  
   {    
    RaycastHit hit;    
    Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);    
    if(Physics.Raycast(ray, out hit, 100))
    {
     newPosition = new Vector3 (Random.Range (-2.3f, 2.2f), Random.Range (-4.4f, 4.5f));

     StartCoroutine(respawnWait(hit.transform));
      
     hit.transform.position = newPosition;

     if(hit.transform.tag == "Player")
     {
      plusScore = 200;
      score += plusScore;
     }         
    }
    if (hit.collider.tag == "N")  
    {
     score -= increaseScore;
    }    
   }
  }