Fresh Idea
Honestly, if someone heard "one-button platformer" they'd expect the game to fall flat on its face but you managed to take a iffy concept and perfect it. The controls, while limited, is very precise. That's a con and a pro on its own. It's definitely a challenge but sometimes it feels a little unfair. But that makes it all the more rewarding when you finally beat the level. And the sketchbook graphics are very nice and simple. It complements the gameplay to a tee.
The only reason I didn't give this game a perfect 10 is because innovation alone can only take you so far. The game is entertaining for only so long before you grow tired of the simplicity. But, for a concept such as this, you perfected it.