The game only really works in fullscreen. Even at the highest difficulty (speed 100) it was still too eazy. The dodging of those enemies could have been random, since i figured out how to one shot them depending on which direction they came from.
I think the feedback definately goes in the right direction but for me there was still missing something. Maybe animation for the blackhole or something.
The music was acutally terrible: too monotone and repetitive. For the sfx you may should have alternated the pitch a little to get at least some variation. So gameidea was ok and feedback was the best part but still improveable.