Great stuff! Really enjoyed the lighting and switching between gamemodes.
My feedback would be :
- Jumping from shooting people to beats is a bit jarring, maybe the people sections could be extended so that the beats sections break up the rhythm (e.g. 4x people 1x beat)
- Enemy movement would make it a lot more active I think - or placing the player in an arena surrounded as opposed to the platforming section
Hope you have time to give us feedback and a rating for MaizeGunner!