World of Goo is described as 'physics based puzzle / construction game. The millions of Goo Balls who live in the beautiful World of Goo dont know that they are in a game, or that they are extremely delicious' and is a very popular Puzzle Game in the games category. There are more than 10 games similar to World of Goo for a variety of platforms, including iPhone, Android, Android Tablet, iPad and Windows. The best alternative is Eufloria. It's not free, so if you're looking for a free alternative, you could try Contre Jour or Huje Tower. Other World of Goo like games are OpenGOO, Moonlights, Trash Tower and Tower of Goo.
Gluddle is a fantastic, creative game that doesn't just copy the mechanics of other puzzle titles, it takes them, mashes them together, and pushes them farther than they have been previously, and has had some great support through updates from the developers.