Interesting idea. I like the atmosphere and the powerups were actually quite fun to use (like the shotgun). Some feedback:
- The game gets overwhelming quite quick. There is no way to keep going for a longer while because there doesn't seem to be a way to really prevent damage completely? I tried for quite a bit but maybe I'm just bad.
- I think things like the mini map are nice but definitely unnecessary in a game like this and especially if the time spent on that could have been spent on more polish. Especially the level design seems to have suffered from resource allocation.
I think overall though there is potential here for some good hack-and-slashy type gameplay!