Music is nice. Aestetics - simply clever. As other people said - bounds, flashy screen, should be fixed.
It has pretty simple mechanics, but it's rather a good point. Solid project. Almost playable as a high score game.
P.S. there is a couple techical things:
1. I am not sure, but while playing on WebGL, I felt like music is freezing. I thing you should recheck the compression for the music file (I'd recommed -> Vorbis, Stream, ~80% qualitiy).
2. Sometimes I can see the glitchy lines on the screen. It may be unity camera related, you can try using pixel perfect bundle. It may be texture related, then you sould use sprite atlas. Or it may be caused by wrong graphic settings (v-sync, AA, e.t.c.).