I think the music is pretty dissonant, doesn't fit the gritty dark story, but maybe that's what you're going for for comedic effect? In that case I don't really mind. The gameplay itself was pretty simple, reminds me of those old flash shooter games where you control a character from a top down view.
Overall, good effort! I can see the hard work put into the level design, while the graphics isn't anything too special, and mixing two different art styles is a bit strange, and the size of the tiles vs the size of the character feels a bit weird as well in terms of proportion, but overall still a neat concept.
Theme interpretation is pretty basic, but I'd say it's fine.