I love DDR! this is a pretty cool retro take on it! my only big complaint is it was a bit difficult to tell when to hit the beat right. it seems sometimes the arrows didn't sync up properly or you would have to hit it right above or early before your UI arrow. Not a big issue but took a bit of practice to figure out the timing.
Rythem games are pretty hard to accomplish so great job in the use of rhythm music and your limitations!