Day 7 - It's done, and with 91 minutes or so to spare!
Implemented all quest chains, skill upgrades, and both melee and ranged combat - seen here, an under-leveled player running away from a peeved moose.
Did quite a bit of polish on the menus and text, which is feeling a lot smoother now. It's not feeling especially strongly themed - my original notes had focused on late neolithic themes, megafauna, conflicts with other humans, etc., whereas this is a lot more minimal - it's really just you and a spear against the world.
Also play tested it on my partner, who does not usually enjoy games with lots of text or menus, and got great notes.
I'll probably reflect more once I have a little distance, but very glad I spent the time to make this, and appreciate this community immensely.