Took me a bit to figure out what was going on (because I don't read instructions), but really gelled once I figured it out. Compelling loop, good music, graphics simple but with a nice feel. Really liked the idea of having angled planes on the "flipper ship" to bounce in different directions. Second the call for keyboard rotation controls. I think it might be interesting (if you haven't tried it already) to see how it works with the standard asteroids controls, which would take care of position and rotation as well as being more "spacy"... If you really want to excite the nostalgia factor, suggest vector (instead of pixel) text.