Downhill Mayhem is wicked riding game where your are in a downhill mountain bike competition! Earn points for speed and aerial tricks performed. Press the up arrow key to speed up and use the spacebar to jump. When you are in the air, press the spacebar and one of the arrow keys to perform a trick. Make sure that you give yourself time to land or prepare to eat dirt. Race through each of the 10 challenging levels and win the competition right here at fast-speed-games.com!