Ah, I see. Well, I do have a simple RPG system that I've released under Creative Commons which you could use if you're okay with using CC licensed stuff. You can check it out here: https://lonespelunker.itch.io/fafo
It's about pushing your luck and trying to avoid suffering the consequences of doing so, so maybe it would work for a kind of narrative-driven PC RPG. Be sure to take a look at the sample adventures, because those would probably be a good guideline for how a FAFO-based PC RPG would be organized narratively.
If you end up using it in a game, be sure to drop me a line and I'll send out a message to my followers about it.
Good luck with your project!