You are a servant of the good. You must protect the tranquility of the highway. Catch and pull our from the highway all the bad people. Use your car to hit the car of your enemy.
Avoid that those cars hit each other or the pedestrians, stopping them by selecting them with the mouse, trying that none of them stop too long to achieve a higher score.
Leave those cars in the squares marked by arrows, placing the front and behind part as indicated... Lead with the arrow keys and put the brake with the spacebar.