Oh well yes I know about layers. However, if I put a GUI layer over the main scrolling background, it doesn't restrict the scrollable/movable area, and it is possible for things to move underneath of the GUI where they can't be seen. I was wondering if there was a way to restrict that built into Construct.
I am thinking I would have to add enough solid border around the edge to keep the player sprites from being able to move under the GUI. That might do the trick instead.