//when an enemy hits the paddle line, dec the HP as needed
private void checkPos()
{
if (transform.position.x <= -20)
{
sm.decHP();
Destroy(gameObject);
}
}
//decrements health and ensures next ball launch is consistent
private void Death()
{
start = false;
rb.velocity = new Vector3(0f, 0f, 0f);
sm.decHP();
}