Oddly good
I liked the the near endless exploring.
I think I ran into a glitch, though.
I went all the way left on the back of an ostritch and when I jumped of the edge, the ostrich just kept flying off into oblivion.
Day turned into night.
Night turned to day.
Eventually the ostrich left me, and Iwas left with my caveman in perpetual dance in the sky.
Did I win????
(just riding the ostrich gave me a nice flashback of Joust)