Definitely a fun and wacky game! In my opinion it doesn't excel in any particular aspects, but in this case I must say that the result is greater than the sum of its parts, the resources were used really well and the outcome is a short and fun game. The only thing that I can complain about is that the game is pretty graphics-heavy, I feel like the bloom effect with some weapons could be a little excessive when there are a lot of particles on screen (especially for the Sewage blower, if I'm recalling the name correctly) and the screen shake on some weapons is a bit excessive too, especially when tap-firing. And also I would have added a bit more feedback when the player has to reload (maybe a bouncing "R" above the character's head, but it could really be whatever you want).
Other than that, it's a great and fun game, good job!