If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The police has decided to take some measures about all the illegally parked cars out there, so you have the mission to drive a tow truck and pull all of them to the police station parking lot. Use your arrow keys to drive the truck and the space bar to brake. The cars will attach themselves once you park correctly. Follow the arrow which will indicate the right direction and try to finish all twelve levels in the time given without damaging your truck. Have fun!