And then when we're happy with it, we can copy that to a game page. 

edit: Basically it will have the same functions as the current theme editor and game editor in the game page, but it will let you store a "look" (or maybe 2 or 3 looks).

It will also have an "apply to" function which lets you apply the look to the game page of your choosing. Also, the looks can be accessed from the game page itself and applied.