This website is not Officially made by Projectmoon and was only a Fan content, you can buy Libary of Ruina on stream to support Projectmoon
This website is made by a Libary of Ruina Fan To exlpain it’s mechanic and gameplay to new players from experience, we will explain the basic of the game and it’s mechanic for new people who just got into the game.
here’s the link to the game
https://store.steampowered.com/app/1256670/Library_Of_Ruina/