Thanks for pointing out the translation errors. I'll be uploading an updated version in the coming days.
To answer your question: I've drawn inspiration from a wide variety of board game dungeon crawlers over the years. Specifically, the dungeon generation is based on the Dungeon Master's Guide (DMG) for Dungeons & Dragons as well as Paul Bimler's 5e Solo Gamebooks. I also played a lot of Four Against Darkness. As for the combat and character system, those are built upon drafts from a sci-fi role-playing game I developed many years ago.
Yeah, it's definitely a lot of fun! Hang in there during your first runs, sometimes they don't end so well. :)