Alright, I don't know WHAT these other people were thinking. This game is awesome!! It challenges you to solve puzzles and battle bosses, like any good game. The color is magnificent and the game has great graphics. Plus, there are extras and things to unlock, adding to the fun.
My 7 year old loved this game -- we ended up buying it from Gamefly.
The attacks and game control were pretty easy for him to master. I had to help in a couple of places that were impassible for him. There were a couple of tricky puzzles to solve, and I've observed the tilt control feature in some games to be a little difficult for younger kids. If you plan to be involved with your child as he plays, this is a great game to play together.
It has some great humor. Dewey is very cute and had my son laughing several times. (The intro scene is like having an icepick driven through your brain, but just ignore the annoying voice talent and enjoy the game).
This game was very cute, but the controls aren't as precise as I would like. I found it very hard to control at points, especially on the ice world.
If you like inventive, fun, platformers, then this game is probably for you. It's a bit like a combination of Super Mario + Super Monkey Ball, since you control Dewy primarily by tilting the world using the Wii Remote.