void OnTriggerEnter2D(Collider2D other)
    {
        if (other.gameObject.CompareTag("Collectable_Apple"))
        {
            // play the pickup sound
            myAudioSource.clip = pickupSFX;
            myAudioSource.Play();
            // move the pickup to a new location
            pickupSpawner.Pickup_SetRandomPosition(other.transform);

            // now make the total of the body count 1 longer
            bodyCount++;
            gameManager.IncreaseScore();
            gameManager.SpeedUpGame();
        }
    }