Racing is a game of speed and if your car is not fast enough then things won't go in your way. That is why; racers always upgrade their car whenever they got the spare money. Of course, that's if they had the spare money to buy it with, but it won't be advisable if you have just enough for the other expenses in your life. There are two goals in each level and the first one is your placing in the race. You need to be in top six to advance to the second level. The other one differs based on the level, but you will need o unlock it if you want to unlock other cars for the racing. Of course, you would still need money to buy it with.