This was a fun time waster of a game, but it has been broken since the winter event. Your resources that you gain while idle are being sent to the winter event, which is no longer going on, so they are wasted. Progress in the game all but stopped around the time you get to the Hellcat. Up until then it was a lot of fun and I've restarted several times. Until they fix the issue with the idle resources though, it is kind of dead on the water to anyone past a certain point in the game.