Enjoyable, pretty addictive and actually, it's not as simple as it looks even the game looks pretty simple. It's hard to take 1st-6th position once on team mode unless you keep upgrading your bike. Though, the gems aren't easy to get. Maybe a little change to use coins instead of gems for further bike upgrade by make it a bit higher within each class ( rookie > team > pro ) will make it more friendly user to the fans and other gamers who enjoy the game. Anyway, it's overally a great app.