Previously on Nintendo Wii, World of Goo has been officially ported to Android phones... it's a physics style puzzle game in which you build structures to get your goo balls from one point to another. IMO, it has good GFX, fun gameplay and each level offers something new it seems. Get it in the Android Market for $3 (special offer until Dec. 5). There is also a demo to try in the Market.
Review: World of Goo Android physics-based puzzle game (video review)