Hello, yes, Joiplay is supported, but what Joiplay does is using it's own renpy version, and people tend to customize or change things. I realized this over years of supporting and helping people who use joiplay, and my answer was because lots of these players doesn't normally know the game has an APK version. I think it was a little bit dimissive, yes, I tried answering as fast as possible, but I always suggest using the APK.
The game works perfectly. The reason the game might not be working on the user's end is because the joiplay version that is running renpy and opening the game is old/new and the code of the game is not updated for that version. See it as trying to play a game from Unreal Engine 4 and trying to run it in Unreal Engine 5, just as a quick example.
Maybe I should have told the solution, that is change the renpy version, but sometimes that's not even enough, people tend to modify files, apply patches and stuff that it is really difficult to give support.
In short, the game is not broken, Joiplay works. Settings of the own joiplay are making the game broken. Or maybe something entirely different.
I'm sorry for the rude response, that's my bad tbh, I don't t know why I answered that way.
The proper renpy version for the game is
Ren'Py 8.0.3.22090809
