Hop in the car and direct it straight to the springboards which are located on the roofs of the buildings. Don't be afraid and accelerate to collect all stars!
These roofs are full of springboards and you find yourself in the car located exactly on the roof. Don't ask yourself how did you get here, start the engine and drive on the springboard accelerating fast, jumping over the gaps and landing on the other roof. Collect all start and pass to another level.