Basically the instruction here is simple, you simply drive your truck to the other side of the city and you go to the next level. You have five trucks to finish the whole game from start to finish, meaning that you need to finish the whole level with those five lives.
Use the arrow keys to get to your destination without falling on your back. So you need to know how to maneuver your way through all the obstacles. When the truck crashes, you are off at the starting point minus one of your truck, of course. The game ahs twelve levels to which one is unlock after you finish one level.