I liked the general idea/mechanic. Shooting is fun, but a bit chaotic. I'm not even sure if I could get 3 stars consciously. The new mechanics are introduced at the right pace and the short levels didn't feel frustrating, but it's hard to point your guns when you're orbiting at high speed.
Music wasn't bad, but needs a bit of variety. Sounds are ok, except for the one that plays constantly after you shoot all your minimoons and the menu beeps.
I liked the anarchist theme, though I'm not sure if space anarchists would sacrifice whole planets (and their people) for their cause, haha. Also, it ends a bit abruptly. A separate screen for the ending or credits would be nice.
Cool game :)