It is as I said about the small slimy Goobällen, of which there are different ways to build a scaffold so (or move or whatever) in order to achieve a pipe. What so easy at the beginning sounds, turns out - especially in higher level - an extremely tricky out. Although one usually has a very motivating effect AHA and the whole level dissolves into thin air.
In addition to this Gerüstebauen and pipes reaching, however, a very great story is told with a lot of depth and infinite lot of humor. However, it is not that it just about people going as well as possible to entertain but it's actually a story to think.
This entirely positive effect is further enhanced by a foolproof control and the seemingly inexhaustible imagination of the programmer.
In addition to last but not least a soundtrack that is as epic as if it were written by one of the masters like Danny Elfman soundtrack itself. However, he stands out not unpleasant to the fore but emphasizes only the addition simply magnificent atmosphere.
All in all I would say is World of Goo game from which one wishes there were thousands. It is a game where it comes to having fun playing it. Not to exaggerated effects or the like, but solely to a good game.
My opinion: At the latest World of Goo the computer games have made the step towards art :)
Absolute buy recommendation!