If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Drive a police car and try to park it in front of the police station fast and safely. Try not to crash your car into anything because you may damage it and also be careful not to hit the pedestrians and cops that are walking outside. You can see your health bar in the bottom left corner of the screen. You have limited time in each of the eight levels, that is why you have to hurry up and keep your eyes on the timer. Have a blast!