Super Mario World

[JonLeung]

Copy and paste...?

[The Ultimate Koopa]

I thought so. And, how would be the best way to re-arrange the rooms so that the pipes don't get too cluttered and look like spaghetti? Would it be a kind of "trial and error" thing? I.e. just play around and see which works best, thing?

[DarkWolf]

Might help if you use an image editor with layers.  Paint.NET is free if you don't have anything that can do it already.