In itch, there is only one version of my current game. In PC or MAC, If you save the game in the current version and do not delete your user data, you can load it in the future versions.
If you have further questions, join my discord and ask me about them.
There should be a folder called JM. It should be on your phone storage. In that folder, there is a file called jm.desireoffate. The save files are located there. Just don't delete that.