This is a map I made. It is basically the first 4 levels of the backrooms. It is a fairly easy challenge. All you have to do is go through each level without dying. To get to the next levels you need to explore random places in the backrooms and the portal to the next level will appear somewhere else. Some levels do need you to interact with things to unlock the next level

IMPORTANT:

BEFORE ENTERING THE WORLD, MAKE SURE YOU HAVE IMMERSIVE PORTALS INSTALLED. OTHERWISE, IT WON'T WORK AND YOU NEED TO RE DOWNLOAD THE MAP.

Downloads:

Immersive Portals (Mod): https://www.curseforge.com/minecraft/mc-mods/immersive-portals-mod/files
Fabric API (Mod): https://www.curseforge.com/minecraft/mc-mods/fabric-api/files
Fabric (Installer): https://fabricmc.net/use/installer/