World of Goo is a visually stunning physics-based puzzler that lets you create structures out of tiny, elastic gooballs. Think Apparatus or X Construction, but covered in slime.
The idea of the game is to get the gooballs to the intake pipe, which is usually in the sky, beyond some sort of chasm, or otherwise out of reach. In order to do this, you must use your gooballs to create bridges, towers, and other structures from a predetermined starting point. As you might have guessed, it's quite challenging to create something structurally sound from the elastic gooballs. Also, you only have a finite number of them to work with.
While World of Goo's plot is convoluted and unquestionably bizarre, its gameplay is another story. Simply tap to grab, and drag to pull. Within each level, there are signs posted with quick tips as well, but those are vague and unhelpful at best. Regardless, we were able to pick it up and figure it out without much effort at all. And if you've played other construction-based puzzlers, like Apparatus or X Construction, then you should be in great shape.
Overall, we think World of Goo is an absolute winner. The graphics and sound are awesome and the gameplay is intuitive. Plus, it takes the addictive challenges of other construction-based puzzlers and adds its own unique, gooey twist.