The game is really fun!! I already managed to open the second station. However, the progress is not saving sometimes. Earlier it would happen only when the game got stuck (for example, I could have already built all possible facilities after opening book store, the game crashed and after opening there was nothing, including other changes). Today the progress did not save even after usual exit. I had upgraded some, the game was open long time and now all of it (+almost 30M of money) is lost