if i remember correctly, it DOES work for rayman, but the touch screen controls work a bit differently than in mario 64... so it doesn't work as well.
rayman, i found, is just a hard game to control altogether. they tried to give it mario 64 controls, but didn't quite get the touch screen concept yet, so it plays like it's broken... as opposed to mario 64 which just has a learning curve to get used to the thumb nub.