I found a way to edit a World of Goo original level in WooGLE. Hahaha
(My system is Chinese, so you may don't know what I'm doing.)
WEGFanStudio(tm) - World of Goo, EDGE and Gish Fan
"This video is no longer available because the YouTube account associated with this video has been terminated."
By the way, just describe what you did. It's easier than making a video.
IRC | 1.3 Patch | Reference Guide
Probably screw up the original names in WooGLE's data.
World of Goo: Another Planet is coming!
Download the demo here!