This is a sticky thread where you can discuss the creation of new worlds.
I’m currently short on time so I’ll keep my advice brief and expand on it later. Feel free to chime in with your own suggestions and experiences!
Currently, to create a new world you need to (1) Clone and Edit an existing world (2) Remove anything you don’t need such as Entities and Locations. I recommend not removing all the Stats though. If your world will use the World editor you must maintain these 3 stats: Stomach, Breast Size, Fatness. (3) Download your new world
Every time you want to play your new world you will have to upload the world file in the main menu. This is inconvenient and next version will allow you to store your worlds in the game that will persist even on page refresh.