This looks like it has some good potential. I like the visuals and the music, but it has some flaws.
First of all, it isn't really a game. When I missed 100% of the notes it would just keep on going and at the end of the song say things like "amazing" or "excellent" even though I clearly wasn't. There was no summary of notes hit or anything either, so the experience was really the same regardless of what I did. It's more like a video.
Secondly, if hitting notes did matter, it would be way, way too hard. Tons of notes fly at me rapidly. I'm just not that good, especially when the UI changes constantly and I don't have a chance to get used to it.