To pump your car and get a new one, go through every stage of the game as brilliantly as possible. Take into account the fact that you can not touch the fences. The distance must be passed without a single violation, while quickly, then the amount of coins earned will be higher. And the chance to upgrade cars more. You can and do not perform the current task, but simply move away and for the current time to ride on a mountainous terrain. True, you will not get money for this, except for the pleasure of arranging a race on impassibility.