Introduce
The direction key
control game, in the game has three stage props to use for you, turbine wheel speed-up: Speeds up the speed suddenly, but reduces operationally, suits the straight line acceleration. The time grows: Increases the game available time. Emissions asphalt: The tailstock discharges beach asphalt, first meets the vehicles will immediately decelerate and pause in-situ. According to numeric keyboard 
use stage prop.