itch.io

All I had to do was unzip it, then run the file named "World of Sisters LINUX.x86_64".  I ran it from my file manager, but some people may need to run it from the terminal depending on how their system is setup

BTW, since you asked, game works perfectly on Linux

They  actually did post on their discord 

Hidden Life Studios — 07/01/2023 2:45 PM

Working on the script of the chapter 2. Almost done. After that, only rendering remains. Two months at most but I hope less.

Available from the google play store, along with a plugin for renpy

Yes there is, it's called JoiPlay