I like this game, it's challenging and engaging. Giving it 2 stars because as you get to the 4th chapter, every time you want to get free tokens, the ad comes up as a black screen and freezes up. The only option you have at this point is to restart the game and loose both rewards and regular tokens. Eventually you just run out of tokens, and you can't buy them with coins. So you just can't play. What's the point? If this is fixed, I would give this game 4 or 5 stars.