At first I thought this was as a simple vertical scrolling, but by staying close to the black hole I realized it was more complex than that. The ship is in fact orbiting around the center, am I correct?
Anyway, I found that visual effect quite original! I regret it's not visible once we get far away from the black hole.
Aside from that, the controls are pretty good. And while the game is short and pretty random, it's still nice to play.