Look at the example here
What you want to do is parent your collections and collection proxies. Then you load / unload via the parent container.
What is your level data? A collection or something made with apps such as Tiled?
Look at the example here
What you want to do is parent your collections and collection proxies. Then you load / unload via the parent container.
What is your level data? A collection or something made with apps such as Tiled?