Full options:
Enter XYZ as your initials in Grand Prix mode. This will enable all ten tracks will be in arcade mode and sixteen drones in practice mode.

Secret Amazon Falls track:
Slowly drive up the hill after the first large jump. Drive through the roadblock that appears on the right side of the track. The secret track is a road with tunnels and large jumps. You will return to the original track if your car hits the side of the secret track.

Night mode:
Hold A + X + Y + Z at the loading screen before the a race begins. Enter the code again to return to normal mode.