If you think that you are a pro when it comes to parking cars then you should try parking your car late at night in a parking area with no lights on. That would surely give you a hard time and that will prove how good you are at parking.
Maneuver your car to the parking space. This game has a time limit, so you need to act quickly. Don't waste time as you need to get in there before time runs out. Try not to bump any vehicles on the parking area. The game gets harder and harder as you make some progress.