Very challenging, a very great missing object game overall, but I suggest that you should make the energy bar like upto 100? Its because the tasks require so much stars and 60 energy isnt enough. Yes you can exceed the energy mark if you get rewards but thats only when you get rewards, when you ran out of energy and you wait for it, it will only fill upto 60 and thats it, if you want you can also lower the required stars for skme not so important quests.