I really enjoyed the game. The mechanic is very interesting/ unique.
The level design could use some work. For example in the second level the enemy takes a long time to reach the player at the start. The final level was really well made, I enjoyed that level the most. I also enjoyed the first level as I could swim in the ammo and have fun moving around/shooting.
This is a mechanic worth exploring and developing into a full game be it mobile, Switch or PC. Excited to see what you do with it!