This game does things right. The soundtrack is epic, keeps you smiling, and meshes with the game environment. The controls and the platforming in general feel just right, even when the levels get HARD. The writing is fun, and doesn't take itself seriously (think cat planet). The level design explores the mechanics well, but doesn't overstay its welcome. The difficulty curve is approachable, and successfully guides you to mastering its nuances.

Other things this game does right:
* Controls work equally well on keyboard as on controller
* Levels short and sweet / mid-level checkpoints available
* Boss fights that work well

You should get this game. It is definitely worth its full price of US$8, and when I got it on sale it was quite the steal.