Wow, I've been experimenting with building walls around my rabbit holes but never would have thought to put them underground! Frackin' brilliant. I would love to download it to check it out in-game, but the link appears to be broken.

So what's up with the super secret door? I am not awesome enough to figure out how that was done or even what it is.

Very nice! I'm so tired of the grey rocks. Thank you for sharing this. :-)