Hey there. I noticed this happens on Mac if you have "windowed mode" checked in the resolution settings menu. So make sure it's unchecked. Let me know if that solves your problem, I'm looking into fixes.
Thanks, that fixed it. This game is fantastic. One of the best things I've seen on the site since I joined.
Well done. =)
I'll have to hard code some of those annoying built in unity graphics options so this doesn't happen to anyone else. And thanks for the comments.