public void FireRockets()
{
for (int i = 0; i < asteroids.Count; i++)
{
GameObject rocket = Instantiate(rocketPrefab);
rockets.Add(rocket);
Vector3 spawnPos = new Vector3(player.transform.position.x, player.transform.position.y, player.transform.position.z + 5);
rocket.transform.position = spawnPos;
RocketController rc = rocket.GetComponent <RocketController>();
rc.gameManager = this;
rc.PassTarget(asteroids[i]);
ParticleSystem parts = rocket.GetComponent <ParticleSystem>();
Destroy(rocket, parts.main.duration);
}
}