This is just awesome.
... and if World of Goo went free software too, it would be just the most awesome thing in the universe.

No data nor levels, but the code, the engine, the game platform. Free levels, free goos, free graphics, free music, the community can make it.
Eventually, there would be 2 WoG:
- The Original World of Goo, sold for 20$ like now, with great graphics, brilliant levels, awesome goos and beautiful music.
- The Free - like in 'free speech' - World of Goo, with community made levels/graphics/goos/music/chapters/...
If 2D Boy do that, I think I will wear a t-shirt « I love you 2D Boy » every day. A different one, each day, of course. And if they can't do that now because this is their only game and income, considering that in some months/years would be absolutely amazing.