the big the problem is you need loads of energy to do tasks & when you run out the only option is to buy some with diamonds which cost money.You don't get enough energy to complete any tasks. Its too expensive as a game & you have to wait a few hours for your energy meter to refill. I used to like it until I realised its a money making game. Since the update,the gameplay isn't saving correctly & you think you've finished a task go out wait for energy & it's glitches,so you've to start again.