Four years ago I made a custom level pack for Baba is You which turned the game into an entire Zelda game, complete with cutscenes, boss fights, and custom music! It's called The Legend of Zelbaba: A Linkeke Between Words, and yesterday @Hempuli, the creator of Baba, finally played it!
Here's the VOD: https://www.youtube.com/watch?v=69CH0Zpvnd4
If you want to try it, you can download the pack here for the PC version of Baba, or here if you have a modded Switch!