Really bad optimisation, my device starts heating and drains more battery than most of those resource demanding games... Also when I open the game after house like for me more thn 18 hours... The keys are still not filled up... Its still there as The time I left it there... Gameplay wise fine... But the system has no idea when time passed... This includes for the daily login benefits too as well... Hope you look into it as it's frustrating and doesn't encourage us at all to enjoy the game...