Ron and Kyle are sending out playable preview copies for World of Goo to anyone who preorders their first release. This offer will be valid for the next few days as well, just in case anyone needs some time to think about the purchase. If you're not going to GDC this year then 2D Boy's debut game (USD 20.00) and Audiosurf (USD 9.95) are two excellent choices as cures for that particular hangover.

The preview copy has more than ten levels to play, and casual players will take at least a couple of hours to complete all. Experts might spend days or even weeks trying to best their own scores, which can then be submitted online.