Step back so the camera sees your whole body — it finds your
skeleton and turns your hands into glowing blades (both hands, several players
at once; left = blue L, right =
green R). Wave your arms to slice the
asteroids, comets, armored tanks and alien saucers raining down on the planet at
the bottom of the screen — and their shots. Clear each stage to
advance; every 4th stage a BOSS mothership appears. Slicing charges your
SUPERNOVA — when it's full, clap your hands together to wipe the
screen and hammer the boss. (Clapping also throws a small shockwave any time.)
Click to start — you'll be asked for camera access.