If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
It is your time to save all the injured victims in accidents, so get behind the wheel of your emergency van and drive around the city as fast as you can, collecting points and parking correctly. You will have a very fun mini-game in which you can give first aid to victims. As you progress in the game the levels will become more challenging, but you could cope if you buy yourself some upgrades and fill up your medical kit. Have a lot of fun playing Medical Emergency!