Really like the concept and I hope you'll expand on it.
There are (as far as I can see) two games here.
The try-fail cycle with a clear win condition suggests a puzzle game. With a strong "tutorial" (starting with only 4 runes and simpler questions) and eventually using the full 24 runes (including using the divisions between the 3 Aett). This will probably be a wickedly difficult puzzle game by the end.
The other option would be to lean into the vagueness of the predictions. Doing away with immediate failure and going down the road of a visual novel, with different, long-term, consequences based on your choices. (consequences such as: "The hunter died, but we found a ruin. A blessing in disguise?")
Both options sound really fun and interesting. I'm looking forward to your future.