Wonderful, whimsical art style
Excellent sound and music
Top notch voice acting
Tons of unlockables/upgrades/achievements
More than one way to solve problems
Might actually have had too many skills--could have cut them in half and used them more interestingly
Map felt confusing to to me for some reason
This is one of the best platformers out there. Go pick it up. It's a pity it didn't sell as well, because we are probably not going to see the sequel it set up, though I'd really love to play it. Support this game!
There is double-jumping!