Been playing for a couple of days and this is what it has come down to.... log in, tap, tap, tap, energy is depleted, log out. Two hours later log in, tap, tap, tap, energy is depleted, log out... repeat ad nauseum. Now if sounds exciting and immersive then this is the game for you. As for me I am unistalling. (Of course you can always buy energy with real world money but if the game mechanics compel you to spend money to advance then you are no longer playing the game, the game is playing you.)