Reverse Courses
You can play two courses in reverse. First, highlight either Down Underdrive or Frozen Tundra. Then, click the View Button before confirming your track selection. If done correctly, it should have a "Backwards" icon next to it, and you'll be playing the courses in reverse!
Super Start
At the start of a race, hold the throttle in reverse. After the screen displays 3 shift to Forward. After 2 shift back to reverse. After 1 shift to forward again. On go the game will say "Super Start" and you'll begin the race with boost power and earn an Achievment for that track.