It's fun and the graphics are very nice.
However, I don't think it did something very interesting with the jam's theme, the "only one" is just used as a specific time constraint that isn't core to the experience, moreover, the core mechanic actually uses "only 3" - 3 jumps between wall touches.
That said, again, the game IS fun, so it works very well as a game, just not as a game design experiment / exercise.