Very simple to understand and straight forward. Its really polished for what it is and runs great. The only issues I ran into while playing was that one of the floating drone enemies somehow got stuck either in a building or under the map, so basically soft locked. The other issue was that my player character some how was stuck in a transitioning phase. My guess was it was stuck in the jet pack fly phase and I also got soft locked from that as well.
Other than that, I really enjoyed it and had fun. Kinda interesting that me and you had a similar idea .