World of Goo started life for Nintendo’s Wii platform and developer 2D Boy has ported the game over to iPhone, iPad and Mac. Without a doubt, World of Goo is one of the most original and innovative physics-based puzzler lately. There are two version of the game for iOS devices. If you intend to play the game on iPad, get the World of Goo HD version. World of Goo HD is a universal app that can be run on iPhone, iPod touch and iPad.