If you wish to immerse yourself even further in the setting, there's an hour-long soundtrack you may access for free, though I won't speak much of it, given that I was the person contracted to make it, lol. It features a few remade tracks from the mobile version

soundcloud.com/jakub-emski/...

I wholeheartedly recommend both the solo crawl and the Adventurer's Guide on itch — the former is PWYW and the latter offers some freebies and community copies, if memory serves. Physical releases are also beautifully made.

I'm currently GM-ing regular Mörk Borg, but will maybe go with Groń next!

Glad you enjoyed it! I never expected to see anyone mention it in the wild, haha. And yes — the mobile game is a port of Corny Groń, a solo TTRPG strongly inspired by Dark Fort, that has since been expanded by Kuba into a fully fledged system-neutral toolkit and setting book (quite hefty at that)