This is a very cool toy. It's also exactly the kind of thing I expect we'll be seeing when Nintendo games finally hit mobile phones.
Anyway, for now, this $US20 Pokemon game (via Tiny Cartridge) is pretty simple: Snorlax is napping on a hammock, and you have to stack the Pikachus. Do it wrong and Snorlax falls out of the hammock. Do it right and...the Pikachus are stacked.
I can see myself playing this twice, then getting bored. Then spending years looking at it on my desk thinking, with Snorlax snuggling a chestful of Pikachu, "man, this is too cute I just can't even look at it anymore".