Super Monkey Ball 2 - World 1 - Jungle Island

Our story begins in Aiai's home village, where all the primates are enjoying their bananas--when suddenly, a big evil airship appears in the sky and takes everyone's bananas. Aiai, not one to let his favorite food be stolen from under his invisible nose, gathers his friends Meemee, Baby, and Gongon and goes into hot pursuit. It seems that the villainous Dr. Bad-Boon is responsible for this, and he's created some weird mazes and whatever for Aiai to chase him through. Or something. The plot loses focus of this aspect really quickly.
A bit of trivia here: Dr. Bad-Boon's lines ARE indeed spoken in English. However, the parts that aren't names of characters get a reverb effect, then played backwards. Patrick Harlan plays him.
These are the stages for World 1. Numbers in parentheses are the difficulty of the stage as perceived by the game, indicated by a number of bananas going up to 10.
1-1 Simple (Difficulty: 1)
1-2 Hollow (2)
1-3 Bumpy (1)
1-4 Switches (2)
1-5 Conveyers (6)
1-6 Floaters (3)
1-7 Slopes (2)
1-8 Sliders (8)
1-9 Spinning Top (6)
1-10 Curve Bridge (2)
Average: 3.3
World 1's stages are much like a tutorial. Simple is there to get you used to the idea of this game. Hollow, Bumpy, Switches, and Conveyers (sic) introduce you to tilted ground, bumps (of course), the VCR buttons, and unusual gimmicks, respectively. The remaining five are easy trials (Sliders is FAR from an 8 in difficulty to me, and most people, I'd bet), there to make sure you get the hang of the game before you get to World 2, which will start to get a little bit difficult.