If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The law was made to be broken, so park your car without taking it too much into consideration. You will have to be a little bit careful, because jamming the traffic may damage your car, so try to avoi crashing into anything. Be fast and park your car before the time runs out, even if you have to park it on the sidewalk or in roundabouts. Nobody will mind, right? There are eight amazing levels that will test your awesome driving skills. Have a wonderful time!