Mirror Mode

Mirror Mode is the same as regular mode, except that you have two "mirror" buttons. One causes the path (along with any bloons on it) to flip over to its mirror image (leaving your towers where they are, even if that means they would be on the path), and the other causes the overall positioning of your towers to flip over to its mirror image (leaving the path where it is, and again allowing towers to be on the path if necessary). Effectively, this allows you to reposition your towers with respect to the path. The buttons can be used as many times as you want, and whenever you want.