Oh man, Neolithic games are my jam! This is a cool take, focusing specifically in on hunting big dangerous monsters to feed your people!
You mention finding artifacts in the opening text but the only other reference I see to them is for healing, which is fine, this is light enough for me to run with!
I really like the change from 2d6 to d10, the swingy nature makes everything feel a bit more visceral and dangerous which is a good effect for this game, I think - and I like the introduction of opposed rolls for combat combined with the HP changes.
This feels like it would lend itself really well to open tables and troupe play, plus I feel like you could bolt in a whole alternate procedure of play for the month-long downtime!
Thanks for putting this together! I love the art and the overall feel!