Or if you would prefer to simply use the gadget directly, without installing it:
(Just click the puzzle piece icon while editing any Wave and enter the preceding URL in the box.)
Or send me a Wave at Dilbrent@GoogleWave.com if you happen to be on Wave. (And if you don't happen to be on Wave, you might as well ignore this entire page.)
Ack: The original game code, which I adapted to be Gadget-friendly and added the high score logic, is by Matt Haynes. Play the original here.
Note: If you would like to hear what the sound might be like (I'd be interested in your opinion) you can try my wildly unpopular and poorly marketed Facebook application: Friendemic, which (obviously) allows you to shoot at your friends' profile pics, ala Space Invaders, but with sound effects.