Alright, the cartoonish visuals don't exactly convey that level of imagined horror, but it's hard to brush off roller coaster accidents when they involve little stuffed creatures. Nutty Fluffies is an instinctual test of momentum and speed – and instead of balancing a bike, as you did in Trials, you're trying to keep a string of connected cars in tune with the track, even as it leaves momentarily to collect hearts. Succeeding is a matter of swiping forward across the screen to increase speed, even while in the air, and swiping backward to decrease it.
There's more to the iOS game than that, of course, with specific animals bestowing bonuses after you purchase them for your empty cars. Also, the vehicle itself can be extended, with the implicit warning that a long coaster is about as graceful as a drugged centipede. Whee!
Ubisoft hasn't yet shared a release date more specific than "2012."