The top down beat em up style is very good, I like the pixel art of your game a lot. I immediately though of Hotline Miami when I saw the level design.
I think the level is a bit too big, you spend a bit of time looking for the last enemy, which is surely the point, but it's not really tense, just annoying. and yeah, like gammamuse said, a bit more juice. But it's a very good game, especially since we had a short deadline (it's feedback if you want to keep working on this game)!