World of Goo is a nice puzzle-game by 2D Boy where you build physically influenced lattice structures from Gooballs to overcome various obstacles. At a first glance it reminded me of BridgeBuilder where you build a steel lattice bridge that survives a test train crossing. But in World of  Goo the building and the test-phase are the same, i.e. the physics are active druing the building. Different puzzles  require different solutions and use of special Gooballs. The art style in the levels is fitting, but the cutscenes are not what I like.

A little game play example:

World of Goo is now available for PC and Wii. There even is a free PC-Demo.