What I liked:
- Good tile-mapping (like the level design)
- simple art style fits the theme of what the game is very well.
- nice 2d animations on the firearms make it feel more clean.
Improvements I could recomend:
- making enemies have different health, different tiers maybe they are weak at first but tank more health towards the end.
- Maybe show a scoring system for example how many enemies the player killed ect.