Graphics and sound are very good. (If you like retro sound.) Easy to pick-up and play. Since it's just the demo version, I can't say anything about the eventual learning curve, but it looks promising, and I already found myself replaying the levels.

The presentation is great. It was annoying to have to glance back at the bottom of the screen to see what color I was firing, especially in fullscreen mode. Also, the cheese bonus has no cheese in it... Otherwise, the game is fun, if a tad repetitive. Adding a teaser screen would be nice too.

Graphics and controls are pretty good, and the games works very well. Not really my kind of game but well done.