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Name: World of Goo
Maker: 2D boy
Compatibility: Android, iPhone, iPod Touch and iPad.
A $4.99 awarding winning app, the 'World of Goo' game is beautifully crafted and strangely addictive. The aim of the game is to drag and drop balls of goo to build structures -- including bridges, cannonballs, and giant tongues (odd combination, I know).
This game is a physics-based construction game, packed with a number of levels. There is also a bonus mini-game called World of Goo Corporation, where the aim is to build the highest tower using goo balls which the player collected through the course of the main game. Players can compete in this game globally.
It's wrapped up nicely by PC Gamer:
"Before long, you're actually building your way out of a creature's stomach. First you've got to make a raft on the sea of his digestive juices, obviously ... ingenious and heart-warming."
Source: App store