This game is great until the 5th world. It has great flow through the first four worlds where you can continuously keep "mining" and opening locked pathways. HOWEVER, in the fifth world you find out you have to have certain QUEST coins to open new paths. But they only allow you to get 18 per day at the most while refreshing every 24 hours. So now all you can do in an entire 24 hour period is wait for them to unlock the quest coins play for a half hour and then be right back stuck as a duck