On occasion it seems that the tanks can get stuck in the river. Also there are times when the tanks continue to fire on what used to be a tank, but has been destroyed. I know we've discussed these issues personally but I thought I would post them.
Also you still might want to alter the alpha values of the items that are not currently selected on the command menu. Maybe drop the alpha to about 20% or so and set the selected one to about 80% or 100%. Your choice, just suggestions.