Tower of Goo is described as 'is best described as Bridge Builder in real-time. The little blobs of goo crawling around your tower can be picked up and dropped as supports'. There are eight games similar to Tower of Goo for a variety of platforms, including iPhone, Android, Android Tablet, iPad and Windows. The best alternative is World of Goo. It's not free, so if you're looking for a free alternative, you could try Moonlights or OpenGOO. Other Tower of Goo like games are Eufloria (Paid), Huje Tower (Freemium), Prune (Paid) and Tiki Towers (Paid).