private void OnTriggerEnter2D(Collider2D collision)
 {
     //if object collected was a donut
     if (collision.transform.tag == "Score")
     {
         //run donut eaten code and destroy object
         Player.AddDonutEaten(collision.GetComponent <SpriteRenderer>().sprite, collision.GetComponent <DonutMovement>().DonutScore, this.transform.position.x < 0);
         Destroy(collision.transform.parent.gameObject);
         this.GetComponent <PlayAudio>().PlayRandom(0, 5);
     }
     //if object collected was a collectable
     else if (collision.transform.tag == "Collect")
     {
         //run collectable eaten code and destroy object
         Player.AddCollectableEaten(collision.GetComponent <SpriteRenderer>().sprite, collision.GetComponent <CollectableMovement>().Score, collision.GetComponent <CollectableMovement>().CollectType);
         Destroy(collision.transform.parent.gameObject);
         this.GetComponent <PlayAudio>().Play(7);
     }
     //if object collected was a bird
     else if (collision.transform.tag == "Bird")
     {
         //knock out lemming and remove colliders
         collision.transform.GetComponent <BirdMovement>().KillBird();
         StartCoroutine(this.GetComponent <LemmingMovement>().KnockOut());
         this.GetComponent <PlayAudio>().PlayRandom(8, 10);
     }
 }