Mid.
A good time passer and good idea, though when you finish a couple worlds, it starts to get repetitive. Lots of people complain about the adds being to much but all you have to do to stop that is to turn off your wifi or other connections to the internet. Though there are some positives of this game, there are some negatives like some minor glitches, or glitches that completely ruin the game. I would recommend this game on a long airplane flight, or on the road.