Is it possible for me to play on mobile? If so how?
This is true. I'm looking into installing the proper means to package and distribute an Android version, but it's been a little more complicated and frustrating than I thought it would be. That said, I will continue to chip away at it to get it working for all of the people wanting to play on mobile!
Make sure you have the latest of both JoiPlay and the Ren’Py plugin installed. The public releases can be found on the free JoiPlay Patreon.
https://www.patreon.com/posts/joiplay-1-20-032-85460458
Although if your phone is severely outdated, you may need to go back to older versions but that will require a ton of trial and error.
If you have future issues, you’ll have to either look to Google or official JoiPlay support. If you still can’t figure it out, you’ll either need to wait or find a PC to play on. I will not be able to solve any tech support issues you have as this is not the place for JoiPlay tech support.