Click the green flag. Use the left and right arrow keys to move your character (the blue square) Use the up and down arrow keys to change the direction of gravity, but only when you're in the light green zones. Use the spacebar to jump. Use the r key to manually reset the current level. Anything black is safe to touch and is tangible. Gray platforms are also tangible and safe like black platforms, but they're turned off when you get your character into a cyan area. As you probably could have guessed, red walls will kill you and you'll have to restart the level. Get to the orange circle to go to the next level.
Hack: enter a number. Not gonna tell you... >:D
