I’ve stumbled across a few other YouTube musicians covering some excellent World of Goo music. Free sheet music is available here.
Bigbenor22
A fantastic pianist. His YouTube channel
Brent Kennedy (Shad0w0nTheSun)
A fellow arranger and pianist. Check out his other arrangements and YouTube channel
http://www.youtube.com/watch?v=h1nOPlFGsFQ
Others
Sorry if I missed your video! If you played something, let me know in the comments below, and I’ll add it.