Really great stuff! Such a great marriage of design and theme. It’s so gameable despite the lack of text I’d normally expect.
It seems to expect to be played solo, but I feel like it would work with a group. I do think if I wasn’t familiar with cairn I’d be a little lost as to how to play this mechanically. You might benefit from a “compatible with cairn” or “mark of the odd” disclaimer so people can look up mechanics easily.