There's a reason why Super Monkey Ball got a sequel. It did extraordinarily well on the GameCube, and this essentially acts as a deluxe version of the first game. It even has a story mode, but story mode was effectively a training mode for challenge mode/main mode where you clear levels sequentially and have a limited number of lives. The party games/minigames are also very engaging in this game. I am giving this a perfect score because this may actually be one of the best GameCube games you can get. Although this game might not be in my personal favorites list, or at least not within the top 20 or so, I think it deserves the praise it gets. It's a very simple to understand game but has increasingly difficult stages that require tons of focus and dedication to master.