Pretty cool game. The art is simplistic in a good way, and I like that you used circles to make eyes and spots. The sound effects are good too; they really make me feel the impact when hitting those pentagons. It's a shame I'm so bad at reaction-based games though; I hardly got far at all.
My main grievance with the game is that I don't think it fits the theme. I don't interpret 'dodging objects' as limited space, but I suppose that's a matter of semantics.