You've got here a really fun game based on a real-world problem. The controls and the physics work well most of the time and even when you fail, it's hilarious to see the guy slide all over the place. The levels are in this empty void and I think it suits the theme of the game. I noticed a glitch on the caffeine tutorial level, the character's arms and legs waved all around like crazy, but it didn't affect the gameplay.
I'd love to invite this game to our contest, the Game Development World Championship!