You and another person sitting next to you will take turns sporadically shaking their mouse on the screen to generate points for each high-five. The game is on endless mode, so quit after the second player's turn after so many rounds to see your final score.
@PullJosh asked someone to make this into a game, so I stepped up and here we are. Sounds from soundbible and ReicheruMusic. Almost all code by PullJosh. Some done by me. Spriting by PullJosh, The Moderates, and I.