HA! It costs 1900 Kreds for 1200 gems. That's over 150 dollars. I don't know anyone who would spend that on a console/PC MMORGP, let alone a crappy turn based flash one. This is a joke.
Oh and there is a mute button. It's on the main menu on the lower left. The music doesn't go entirely off (which is lame) but you can listen to your iTunes while you play.
While the units flee a bit easily (they shouldn't flee if I've already moved them from harm's way, they can still taunt) it was still a fun game. 3/5 because of the retreating BS and only 3 battles for the campaign.