are you using the latest versions of joiplay and the ren'py plugin on your android device? https://www.patreon.com/posts/joiplay-1-20-032-85460458 - the versions in the play store are outdated and your game may crash upon start using those.
Man, I already have the recent versions of both but doesn't work anyway and read the comments seems like the game doesn't work in joiplay for nobody
