Keep fueled up by running through the gas can with the multiplication problem whose product equals your race car's number. Watch out for other cars, obstacles and the aggressive chase car that occasionally shows up. Collect coins & use ramps to land on other racers to earn more points.
Hold down and move the left mouse button or touch to move the car left and right. Your car will slow down when the gas cans appear to give you time to determine the correct gas can to get. Once you know which gas can to get, you can always click the left mouse button or tap the screen to speed up. Be careful when jumping and trying to knock cars off the road. Landing directly on top of them will knock them off the road but if you are a little off you might crash.