Arrow keys. 20 levels. I am sorry for any damaged keyboards. Remember, you can quit at any time. All levels are possible. The original creator has beaten them all, start to finish. (It took a while!) Protip from creator: Try full-screen to make the game slower (and easier). The game is still possible without full-screen, though.
it is very hard so I have added a few cheats and extras: h - to see cheats / extras j - to fide cheats / extras