Curvy Options is the 17th stage of Advanced in Super Monkey Ball 2 (46th in Super Monkey Ball Deluxe), World 3-7 of Story Mode in Super Monkey Ball 2 (World 3-11 in Super Monkey Ball Deluxe), and the 106th stage of Ultimate without continues (86th with continues).
This stage features four curvy paths, which get narrower from left to right. The narrower the path, the more bananas there are. All of these paths lead to the same goal.
There is only a blue goal in this stage. To get to this goal, just take whatever path you would like to take as all of them lead to the same goal. However, each one from left to right gets narrower and increases the number of bananas. So If you are just simply trying to beat the stage, then you should take a wider path. But if you are trying to get a lot of bananas and are confident enough, then you should take a narrower path.