Fun, maybe a bit easy
This was a pretty good rythm game, but I think a wider variety of difficulties would be very helpful.
You'd be surprised how many rythm gams suffer from amateur makers who place their arrows just off the beat or in bizzare rythms nowhere present in the song. Of course, this is very frustrating, but it only seemed to plague your game a wee tiny bit in just a few places.
All in all, nice work