Source: https://emily.st/2014/05/05/through-the-...

Success! I can hack the warp table and go to any world I want from the first warp zone. This has possibilities!

I realized I could then edit 08 03 02 to be anything I wanted, including the Minus World (24 03 02). But even more, I can put in numbers to worlds nobody has ever seen. I wanted to see world nine and play it, so I put in 09 03 02.

Haha, world nine, as it turns out, is ridiculous. You can actually swim through the world all the way to the end. It’s kind of wild. I tried several other worlds, most of which were alphabetical. Each one is different and broken in its own way.