Simple lightweight shmup with poor feedback, which could be modified into a libre F-Zero-like racer. I wish it had rebindable keys and some in-game explanation, but the man page is barely good enough. I was impressed by its replay function.
This is the game that first made me fall in love with Kenta Cho's work. Freaking brilliant :-)
Looks and sounds great! Plays smooth in Mint 17, even on an old Atom-based netbook. Simple controls; uses arrow and Z keys in game and in menu. Worth the download.