In the last test, I encountered what I think were focus problems several times. I would, for instance, click on a temple to some giant. Then I would click on a pig (I can't believe I'm saying this!) and that click would be ignored. I would have to use the arrow keys to move a bit, then click on the pig. So there's some odd focus problem, I think, between mouse clicks and arrow keys.
Sorry for not having a better diagnostic report!