How to explain World of Goo, an utterly charming PC game? It’s basically sticky blobs that when connected have the ability to bridge gaps, curve around odd contraptions and create pathways for other gooey blobs to get sucked into a giant vacuum-like pipe. Oh, and there’s physics involved. Um, what? I truly don’t have the words. So, here’s a suggestion: first, check out the above video. Of course, it doesn’t reveal too much except that …