You're driving the car with your right and left arrow keys. Don't get too ahead because the gray bridge ends quickly and you gotta stay on it in order to keep playing the game. When the bridge ends, press the up arrow key to get your car over to the other side of the bridge, but watch out. If the gaps between the bridges are too wide, press the space and up arrow key TOGETHER to boost your speed and go airborne a little longer. What ever happens, do not let the car touch the red line"