This is rad. You've packed a lot into a single page with a nice, engaging layout. Love your choice of stats and the way advancement is tied to securing a month's worth of food. Also interesting to see that you did away with the bell curve for a more swingy feel that mirrors the unpredictability of caveman life.
One small, silly complaint: The anachronistic reference to a football. Surely there's something appropriately stone age you could have chosen?