Dance Dance Revolution Super Nova 301 songs. 64 are totally new to the DDR series The player must step to the beat, matching the beat to the arrows presented to them on screen by stepping on arrows on a dance stage. Depending on the timing of each step, the step is scored PERFECT,in GREAT,in GOOD,in ALMOST or BOO. A health bar is on the screen, and starts half-full at the beginning of the routine. PERFECT and GREAT steps increase the health bar until it is full. Almost and Boo steps diminish it. Tutorial mode helps players understand the game.