Very buggy. Crashes on my machine about every 3rd or 4th use. Audio often stutters during high-load situations where lots of missiles and explosions are going off. No ability to keep personal high scores, no ability to turn off timed game and play a damage-based game. No ability to change graphics settings once you choose the "don't show at startup option" (or if there is, it's hard to find). In short, the Widget is more fun for occasional use than the actual stand alone app. But it has promise. Hopefully they'll make it more flexible and stable in the near future.