private void OnTriggerEnter2D(Collider2D collision)
    {
        IEatable eatableScript = collision.GetComponent <IEatable>();

        if (eatableScript != null)
        {
            if (CompareSize(collision.transform))
            {
                eatableScript.Die();
                Grow(collision.transform);
                if (collision.tag == "Professor")
                {
                    gameManager.Win();
                }
            }
            else if (collision.GetComponent <Entity>().canEat)
            {
                Die();
            }
        }
    }