Good music and the bopping anime girl is great.
I really had trouble mastering the gameplay, since it's hard to remember which record the DFJK are mapped to and often I would be hitting misses that looked like hits, or all the inputs would disappear and I would see misses anyway.
I do like the concept of juggling multiple rhythm game displays at once, I think it would work a little better with clearer key mappings and feedback on the ui and in the audio.