The rules of the Bj racing game：
1． by clicking on the screen to achieve the right and left movement of the car, to avoid the front of the vehicle
2． Get a score by moving away from the car in front of you.
3． The scores are shown in the middle of the screen, and the more vehicles you avoid, the higher your score will be.
4． if you hit the vehicle in front, the game is over, click on the ok button in the prompt box to start again