private void OnTriggerEnter2D(Collider2D other)
{
Enemies e = other.GetComponent <Enemies>();
// we can safely assume that an object is an enemy if it contains the Enemy.cs component.
if (e)
{
e.Die();
ExplosionManager.instance.SpawnExplosionAt(transform.position, 0.2f); // explosion without reward
Destroy(this.gameObject);
}
}