I like the idea, music and graphics, but it really hard to get what game trying me to do. The "Perfect" labels do some feedback, but I didn't feel how I can do better result. If it is a rythm game, the beat can be a starting point, also little visual things like notes in guitar hero can do the job.
BUT, for first game jam it is impressive stuff you guys made, I wish you got fun from the process and result!