Don't crash! Use arrow keys. Wizard hat (z) makes you pass through walls. Taco (spacebar) makes you bounce of walls and kill bats instead of dying. Level up and things speed up and more bats eventually appear. Die and things slow down. Cheats: (w)in level, (s)lower, (f)aster
Thanks to @soccerballhead and @_alex_soccer_ for the inspiration!