Creating A Testing Environment

So I am trying to make a testing environment for a game which has a bunch of places. But I can’t find out where I can find a way to do it.

If it is not possible to clone an entire game universe then can you tell me an alternative way to do it?

I would open each part, game , place, in Studio and then do a save as or publish as for each one.

Save it to file, open the file, publish it to roblox as a different place.