Not worth even 1 star. It's so obviously rigged that it's just laughable. I struggled on one level over and over, and as soon as I used some of the gold bars I won from a race, suddenly the game finished the level in the next move. Hmmm, wonder why it suddenly got so easy and beatable in 2 seconds? I don't understand how some people can get to level 3000 or 5000 or whatever. I got to around 500 and got so frustrated at the obvious rigged system and couldn't do it any more.