Press the space key when the metronome square flashes yellow. You'll get a message based on your timing. Press the 'S' key to toggle scores. Score items are listed in this order: Marvelous Perfect Great Good Almost Boo
Music is a shortened version of Feed Me - In The Bin I am doing it! I am attempting a Scratch DDR Clone. If you aren't getting any Marvelous, try messing with the value of the "delay" variable. That will be available in settings at some point.