hero_

delete game.prefs

you can find it here:

C:\Users\YOUR USER NAME\Documents\My Games\Gas Powered Games\Demigod

You'll have to reset your graphical settings, etc, but that should sort you out. 

When that happens in game and you want to fix that in that same game, there are several solutions (not sure if I remember them correctly):

Try pressing camera buttons: Space, backspace (maybe), "T" and "delete". "Delete" always fixed this for me. If not, then... do as Pacov said.