I agree that it needs more feedback. I focused too much on the visuals and not enough on the actual gameplay. The goal is indeed to change their orbit so they burn up in the atmosphere, without burning up yourself. The game is kind of broken though, as sometimes debris spawns in an orbit that already crosses the atmosphere. Those are still added to your score. If you are too far away, debris can despawn even though you've correctly changed its orbit so it would've gone into the atmosphere. Anyway, great that you enjoyed flying through space.