So I rented the game today, I'm already to the land of snow.
I've been playing, and I'm realizing what an awesome soundtrack it has, as has been mentioned before by others. I was a little wary at first, but then I realized that they weren't just copy/pasting the same music over and over. Every single level, at least most of them, have their own unique sound to it. Sure, most of them are variations of the main theme, but they're all different.
The difficulty is a little too much on the easy side, even for me (And I'm not afraid to admit it.) It also seems a little too childish for me to take it too seriously, but then I think that was the point. Just the fact that Kirby is nearly invulnerable is almost too far from the original Kirby for me to really enjoy, but it doesn't take away the fun and beauty of this game.
All in all, I give this game a "well done" and "where can I get this soundtrack please please please."