download joiplay and renpy plugin from here: https://www.patreon.com/posts/joiplay-1-20-540-112995251
after installing, download the game and extract the zip file.
open joiplay, give necessary permissions and then you'll see a "+" icon. click it > add game > select game folder > choose .exe or .py
you should be able to see the game icon now, just click on it and it'll start loading. sometimes it will recommend a plugin, you can download it but i just proceed with the game.