You should move your save from android to PC.
I'll add Renpy Sync for v0.2.0, that will allow you to sync saves between two devices!
Ok, I can't do that because I had to reset my phone, and I now I can't tell you how to make a game, but if I were you, I'd put an option right at the start of the game that asked if you played the game before, and you could start it at that point, because I'm too lazy to replay the entire game, and I'm sure I'm not the only one this has happened to.