For me, it's like that, I've tried from joiplay 530 to 510, but it still doesn't work, please provide a tutorial.
Instructions above on this page advice to use Joiplay 7.7.1. Have you tried that?
Did you install the Renpy Plugin?
FAQ page in Wiki has some info.
If the instructions on this page are not enough of a Tutorial, search for Youtube videos on how to install Renpy games on Android.
I have read on Discord that the latest Joiplay does not work with this game, since it is currently not made with the latest Renpy. The Joiplay and plugin version must be as instructed.
On Discord the #help channel may be able to offer more advice, I have not played on Android so I do not know more.
I have learned today that game does work with latest Joiplay version, but the renpy plugin must be version 7.7.1.
Link to that version is on FAQ page in the Wiki.