I could not open the file, but i think i understand what your problem is.
If I was you, i would make different layouts and jump between them. In example: When player hits exit, go to another layout.
I use this method in my own game. I create a level layout, add the level details, copy the layout, remake the new layout, and i have now two levels with the same theme. (Backgrounds and static textures that repetes in different layouts). Now that i have two layouts, i make an exit in the firs layout. When the player collides with it, go to "Layer 2".
Hope this helped <img src="smileys/smiley1.gif" border="0" align="middle" />