Bit Blaster XL
Another dollar arcade controller game. Just as addicting as Downwell, with fast pace 2d action set to some pumping chiptune. Out of the ammo types you get, I find the close range ones like shield, flame, and laser to be pretty shit and will always pick up explosion if I can since it's one AOE damage that one shots everything (As far as I've played, everything dies in one shot). Seems to be a couple different amount of ships to unlock, I've only gotten the first 2 or 3 and their play styles aren't radically different but it's still something worth progressing for. I really want to download the OST, but it seems the download limit has been reached on soundcloud for it.