I'm so glad you enjoyed it!! I'll have to go check out the podcast and give it a listen; I love hearing about the stories folks make with this little game.
It's funny you mention doing an underground theme-- I have an underground setting extension of this on the backburner. :3c Along with a few others.
:0 Oh man I would love to play that extension!!
and here's links directly to the episodes so you dont need to search for them :D
https://pnc.st/s/hopeshearth/2e407c52/archiving
https://pnc.st/s/hopeshearth/bdc77165/they-re-expanding-the-hole
https://pnc.st/s/hopeshearth/2f697ee5/i-will-explain-when-i-get-back