Everybody knows that one of the essentials of driving is knowing how to park your car safely. Needless to say, this is a skill and skill is can only be learned through lots of practice. You might see someone parking their car like it is nothing, but that is because they have done it a lot of times already.
In this game, you need to park your car several times before you can get out of that level. The game gets harder and harder as you move from one level to another, so take this seriously and make sure that you won't hit anything.