Hey, thanks for the feedback! I interpret the prerequisite to just mean "Don't use more than 3 buttons", and in that sense there are exactly 3 buttons for the game (Mouse Left Click, Play on the main menu, Restart on the Game Over screen). It's unfortunately the type of prerequisite where I feel it's difficult to have a "creative" interpretation of, since you either use more than 3 buttons or you don't. I'm not really sure how I'd tackle any of the others that were up for a vote though haha.