This was really fun, I played through the entire thing.
I love how the game really starts to put things into perspective the bigger you get. Obstacles you couldn't even really perceive at first are suddly really small. And the way the mini-games lead you from level to level gives the entire exprience a huge deal of variety.
The soundtrack is also really nice. Gives the entire game a light-hearted and happy feeling, which is nicely supported by the cutesy spritework.
All in all a very nice experience ^^