The way everything is animated and stylized is very joyful and funny. There's a lot of freshness in the feeling of this game.
Because mobs run away so quickly and hide so well, it would probably be better if the kill count was not there, but I feel like it must be there, otherwise the game would feel a little to aimless. But when not caring about hunting every last mob and just wandering around, exploring and shooting for fun the game feels best, as opposed to going for high score.
Otherwise if you plan to develop this further what instnceDstry said about smaller spaces designed to easier clean up sound better.
Good sense for quality of life features, like in that hand room, I noticed bullets go through walls. I thought this is really neat decision.
Menus are hard to read because important and non-important elements look equally pronounced.