Once you enter the event, you will be asked to pay 2 Atlas Bucks to enter a race. After you pay, you'll be matched with another player with a similar number of wins, and the race will start. The racing game itself consists of two major parts: launching the car and switching gears. Launching the car with the ideal RPM and switching gears at the right time is crucial to winning the race. 

During the countdown, hold down the "shift" button to rev your engine to the launch zone.

Once your car is moving, tap only when you are ready to shift into the next gear.