Worth it but not great
This game is pretty good but I not totally sold. I think the app is a little rough, in particular the undo is very buggy and certain steps are not prompted well at all. You also spend a lot of time watching the computer score each turn. Still its an interesting game, probably more so if you enjoy the randomized element brought on by using dice mechanics.
Beemser about
A Brief History of the World, v1.0