The basic concept is somewhat similar to Lemmings – get a requisite number of your charges to the exit by using their particular skills. That's, however, where the similarities end. World of Goo is essentially a structural engineering puzzle game (I know, I know, your eyes aren't exactly lighting up with glee at that description, so bear with me). You must use your animate balls of goo to create towers, bridges and other structures to get to the pipe representing the exit. Sounds...