A free app for Android, by Racing Games Android.

The Crazy Stunt Bike Racing Free app lets you ride a BMX bike on a variety of tricky tracks and get rewarded for your best time, highest score, or most daring ride. Choose your favorite bike and start riding. It is easy to get started and the controls are intuitive. 

Once you are riding, you will have the opportunity to perform various tricks, such as frontflips, backflips, and wheelies. The more you perform, the more points you can earn. There are also obstacles that you can ride over and perform stunts. The more points you earn, the more the game rewards you. You can choose to play the game in a number of different levels, and each level will have a number of different challenges.