Decent game, but I've decided to quit since offline progress just doesn't work 80% of the time, so I come back after 2h and make no progress. Also ad timer just keeps wrapping back to 1h so can't access the Astronaut feature that boosts production by a multiplier besides from the little premium currency you get. You also see the prestige option early on, but nothing happens when trying to use it since it requires Rank 20 which doesn't seem to be explained anywhere.