Welcome to Unfair Christmas! This map is a spin-off of the Unfair Minecraft series. it is NOT made by NICO_THE_PRO, but by me, Pufferfish_King.
This map has been made with the Poofless advent calendar in mind, but anyone can play it.
The map does support several players, and is made for 1.13.2.
Hope you "don't" RAGE too much! Enjoy!
The download link you provide doesn't let users download the map without asking for permission from the owner (you) first. If you could fix that, that would be great.
Sorry for the trouble, It is fixed now. <3