Hey there is no guide for it yet it's still is alot not yet found which will be in the future but there is already a route for it that is easy to learn there is just 1trick you have to learn for it i can teach you it if you want or atleast help you figuring it out
in the future there will be much more figurate out i can 100% tell you that by my knowledge there are alot of other glitches which have huge potential
I see, this is the glitch being used in the new any% run, but doesn't this require an existing save file on 5-5 to be useful at all?
Yes, you do need to use a save file set to 5-5 for this trick. I do wish we had another way to skip parts of the game. For now its the only way we know to skip levels like that. It skips about half the game. There isn't a really good guide for it yet because we don't exactly understand it. I can tell you that you need version 1.1 of the game for the trick to work in my tests. I hope that helps, let me know if you have any other questions.