The visuals dancing to the music is a nice effect and the music is fun to listen to as well. Simple yet enjoyable. I died shortly after the enemies start to orbit around you (which, by the way, is a nice touch) so I am not sure if this already happens, but may I suggest to see the player shrink/grow making them an easier target to hit or having the barriers break after a while and need time to repair like tapping a key to the beat?