Avoid the barricades marked POLICE or you're sure to meet the sheriff
sooner than expected!  Shunt the other vans and trucks off the road to
get the lead spot, but be careful, too many knocks get your jalopy 
coughing, sputtering and grinding to a halt.

joystick left - turn left
joystick right - turn right
joystick down - brake
joystick up - accelerate
joystick fire - shift into high or low gear