I would suggest you use google form to collect ideas and desires for the future.
Now, about the game - I really enjoyed it, but since I only played it once I was left wondering how accurate I was with my "fortune-telling". It would be nice to add some diegetic way of saying that you as a player was "absolutely right"/"somewhat right"/"you've doomed us all!".
I feel this type of game is naturally goes great with deep story - it is possible to add story branches and/or a bunch of separate short stories that together tell the bigger story. At least I would take this game idea in this direction.
Complexity of "reading" should grow step-by-step until player is overwhelmed, sort of like Papers please did it. Maybe add timed reading to rise the tension when story needs it.
Maybe add some simple "non-reading" gameplay - talking with the tribe, studying and learning new tricks and new ways of "telling".