I'm so sorry you lost your progress T_T I think having it properly save progress is still a little ways out, but I'll flag this to our engineers and start getting it prioritized. I notice when I'm testing the game in unity that I have to use the "CLEAR DATA" button in settings if I make certain changes and we definitely don't want players to have that experience when they've made progress in the game.
I'm so glad you're enjoying the game! We're working hard on it, so there will be more updates in the future.