Huh, I made it through the first time with 338 deaths... finding the hardest to be 14-3 (want a slice?) This one quickly became easy when I realized I could hold space own to jump upon landing, rather than trying to tap it again. I didn't find 10-3(this isn't) to be very difficult. In fact, I didn't remember it, so I played again. I must have gotten really lucky the first time around, because it took me probably 200 deaths to get past it the second time.
The controls of this game make it incredibly frustrating to play. Not in the "this puzzle is hard" kind of way, but in the "Oh, I couldn't move that piece because apparently it was just barely touching this other piece" kind of way. A grid would make this game much better.
This could be fun, but it's not really a game yet, I think you need to work with it some more. I seem to randomly finish at the very beginning of level 14... but I don't have a clue why...