A little lackluster. There's not much story and the challenges are merely physical. The movement is smooth and the design is a lot of Nintendo fun.
Yeah, the challenge pretty much comes from getting a high enough score to get gold medals in each level. The levels themselves aren't too hard to figure out until the very end. As for the story, it's just cutscenes that play every few stages or so. It's not much but I thought is was something.