The camera system suffers from the same problems that were present in Sonic Heroes. You can move the camera with the C-stick, but instead of following you from where you placed it, the camera will just snap back behind you Monkey
The puzzle levels are easy on Jungle Island, but they are super tough on other islands. Some involve moving on a spinning square and you can't change the camera to see what's coming up and you have to use the radar. The puzzle levels also have an overly sensitive inertia system. The happiness challenges you do for the monkeys aren't any easier. Most on Jungle Island are easy, but those on other islands are way tougher.
The party games are poorly executed and the new ones are even worse. 'nuff said.
Overall, it was a nice try to give Super Monkey Ball a face-lift, but beneath the bitter rind of problems lies an adventure/puzzle game that even the most bitter of reviewers would admit that the game has some credit.