Really fun concept! I loved the art direction of this one. It reminded me a lot of Ultrakill. I enjoyed the frantic nature of trying to both avoid getting hit and not play too passively due to the timer. I did feel that as I got into the later waves that balancing act did become less prominent, since there were so many enemies that it was impossible to not kill them every ten seconds. A few notes: I did find that the flying enemies just can't hit you on the top floor if you stand still, and, as someone who's left handed, the controls made it difficult to do anything other than move and shoot.
All in all, great game in the short time-frame!