Arrow keys to move, and space to flip gravity. This is a platformer where instead of jumping, you switch gravity. Every level is possible, except you can't get past level 11 because that's the last level.
Credits: I made this all by myself, and this is for @corpcooga's platformer contest! Notes: I originally wanted to make a boss fight at the end of the game, but the due date for the platformer contest suddenly got way closer, so I didn't have time.