I followed those guides to make both ePub and MD versions of The Lurking Fear. I'm more of a writer than a dev by skill, but it wasn't too difficult and it was fun to learn something new. Thanks for the suggestion!
I've added the ePub version to the main itch page. The MD version is only available on this blog post because I wanted to avoid confusion, but I could put it on the frontpage if I ever had enough demand:
https://lymetime.itch.io/lurkingfear/devlog/456584/epub-and-markdown-versions-of...