The most recent Ludum Dare Game Jam's theme of "you only get one" allowed for lots of interpretation. Vallde's entry, Bounty Hunting, gives you just one bullet to destroy an evil worm named Jim.

The game is set on a planetoid-like sphere, and you fly around its surface in a way not unlike Super Stardust HD. The catch here is that once you fire your bullet you can recollect it and fire it again. Killing the normal enemies is simple enough, but Jim is a bit more prickly of a customer. Check out the game through the browser-based Unity version, or head over to the entry page to download the actual file.