Fantastic solo system! I've seen a lot of solo games on Itch.io, but what makes this one and Flee the Flood unique is how open-ended they are - because they don't rely on specific journaling prompts for each card, the rules can be adapted to any story with rising stakes, as long as you come up with new things for each suit and each face to refer to.
One thing I'm curious about: is there any reason the Threat is laid out in a specific way? From what I understand, you lose when you have a full set of 2 through 10, regardless of the shape they're in.