A shooting game where gravity does half the work against you. The asteroids coming at you are large enough to pull your ship off course, and with no engines you cannot simply fly around them — the cannon is the only answer, and a rock destroyed late still leaves debris moving your way. An upgrade menu between runs improves the ship's components, which is what turns a frustrating start into a manageable one, so spending time in space without a paddle is as much about the shop as the shooting.