The game felt polished and well designed and i had fun playing it. Here's some constructive feedback that i came up with while playing.

I noticed a bug when I died where I had negative health and just became a disembodied gun that could shoot but not move.

From what I could tell you don't actually have to kill the enemies, just get to the end. If the enemies dropped health when they died that could encourage players to fight them more.

Hope the feedback helps, also the bug was a very minor part of the experience, definitely enjoyed the game as a whole. Keep up the good work!