If you have a DS, please head to your nearest Wii, game store, or DS kiosk to download a free demo of Rhythm Heaven. The above video does a better job explaining the game than I ever could, but in short, you tap, flick, hold, and slide the DS stilus in rhythm with the music to produce a desired effect… say building robots on an assembly line. It’s as crazy as it sounds, but also a lot of fun. I haven’t played a game that made me smile this much since World of Goo. The full version comes out April 6.