Frankly, this is one of the best uses of the PbtA rules I've ever read. Evocative, simple, and the quality of the book is high for it being completely free.
I've always loved PbtA games and mechanics, and I'm also a loner who also happens to be the GM of a small group; I'm usually skeptic when a game claims to be made for solo play or for small groups and fail to deliver in the end, but this one REALLY works well for solo and GM-Less play! And ALSO works well GMing it.
Please, do yourself a favor and play this! I hope this game keeps getting support, it would be great to see it expand to other genres.
[5 of 5 Stars!]