This is a custom world called “Life Is Hell” or “World Is Hell” https://biber59.itch.io/baba-is-you-mod-world-is-hell . I made it using the level editor of the original Baba Is You game jam version, https://hempuli.itch.io/baba-is-you.
This mod features multiple exploits and loopholes specific to the game jam version, and yet it has some lore and difficulty to it.
It is one of the few custom worlds out there for this game, and i am looking forward to seeing some more challenging mods coming in the future, even by other creators!
Lastly, i wish you best of fun playing this. 🙂
Full credit for the original game goes to Hempuli and the game dev team, not me.