The game has a lot of personality, it's definitely been put together by someone with a sense of humor. The animations all popped, especially the facial expressions on Jarhead. I also enjoyed Ick's wacky looking wall grab stance.
Some feedback:
1. Jarhead was... difficult. I eventually realized that the jars were flying up in a pre-defined pattern, but they were still so fast and there was no real telegraphing when or exactly where they would spawn, so it made dodging pretty hard.
2. I had to hard reset the game twice because of the box pushing mechanic, first because I pushed a box that I needed into a wall and couldn't get it to go back the other direction, and another time cause I pushed a cart up the stairs and then was unable to jump up past it cause stair jumping was sort of finicky.
3. More of a personal nitpick, but CTRL is a pretty awkward button for attacking (for me at least).
Overall, the game was short and sweet and I felt good when Jarhead finally went down (even though I died at the same time :p). Good job!