World of Goo is a physics-based puzzle game for the Wii. You create structures out of goo and usher around goo balls with them. The gameplay can be pretty interesting, with quite a few different kinds of goo to play with and some interesting puzzle physics to go with it.
First time author STBM uses careful planning and some interesting glitches to complete levels in the blink of an eye. See the author's notes for a full explanation of the various methods used.