I like the hand drawn art style. Creative interpretation of the theme. I thought the balloons were some sort of bonus and didn't realize they were hurting me at first. Some kind of kick-back or visual indication that you've hit a hazard and received damage would be a nice add.
There is also something trippy about those ceiling and floor animations. It plays some sort of trick on my eyes. Once the game stops it still looks like the screen is moving for a second or two.