Touch Input help..

I recently published my game, but it turns out that the stars aren't being destroyed with a simple touch. But the GUI buttons are working fine.

Here is my script:

 function Update () {
 
      if (Input.GetMouseButtonDown(0))
      {
  
        var $$anonymous$$tm : RaycastHit2D = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
        if($$anonymous$$tm.collider != null)
        {
        audio.Play();
        GameMaster.currentScore += 1;
          Destroy ($$anonymous$$tm.collider.gameObject);
        }
        if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began){
        if($$anonymous$$tm.collider != null)
        { 
          Destroy ($$anonymous$$tm.collider.gameObject);
        }
      }
 }
 }

I was told to refer to t$$anonymous$$s: http://docs.unity3d.com/ScriptReference/Input.GetTouch.html ,but I have no clue how to edit it.

Here is my game if you want to test it out. https://play.google.com/store/apps/details?id=com.ZYPHER.TapTheStars