If you would like to create a second level in the same way you did the first, the easiest option would be creating a new layout for it.
If you really want to do it on the same layout, the best way would be to place/create all your objects/assets in your "on start of layout" or through a function.
The coordinates and all other relevant information could be stored in an array (internal or external through Ajax)
Using groups as I mentioned above would make it easy to have this placement different per level.
Activating group level1 to create the objects where they should be in level1, Activating group level2 to create the objects where they should be in level2.
It's impossible for me to be more specific without knowing anything about your game.