Fellow slime!!
Man, I really liked this game a lot! It progresses smoothly and teaches you concepts in a clear manner. Perhaps the only one that was somewhat hard to pick up (especially if someone not familiar w/platformers plays your game) is tapping Z when bouncing on an enemy to get a boost. Oh, and I'd also say you move the restart/suicide button over to the other side of the keyboard. I played this game with three fingers of my left hand: 2 which I really needed all the time and 1 that killed me every time. Guess which one I pressed the most? :D
Also, the intro music reminded me of Seinfeld, for some reason haha.
Thanks for sharing! Rated!