Portal 2's level creation tool set has only been out for a short time, but already ambitious players are showing their stuff. Take this Rube Goldberg machine of a level. Sure, it basically plays itself, but it's fun as hell to watch.

We can't wait to see what Portal 2 players will come up with next. Seen any other great user-created levels? Let us know in the comments or on Twitter.

[via Kotaku]