I just released my own hack of the Tunnel Goons rules, called Burrow Tales!

In Burrow Tales the players take the roles of brave adventurer bunnies and Burrowardens, going underground into the vast networks below their kingdom. Make your bunny and go deeper, keeping your people safe from the dangers unearthed below... or perhaps you dare brave the world above the safety of your home?

Find it here: https://whitecat.itch.io/burrow-tales