Im creating a very simple game. The game consist in a plane like 1945 game. My problem is that I created the fist wave of attack with one enemy. When you kill some enemy the next wave will attack, but I dont want to reprogram all actions to the new enemy.. So I test the collision with the ship and with the ship fire with one enemy, but if I have ten enemy I have reprogram all?? Its really annoying... How can I do this without have to reprogram and test all ten (or more) enemys?