Light Flyer jet
 
 Successfully complete the game with the normal ending. Note: Use
 Limit 500 or Unlimited modes.
 
 Leo Copter jet
 
 Successfully complete the game with the good ending. Note: Use
 Unlimited, Mirror or Reverse modes.
 
 Foo Fighter jet
 
 Successfully complete the game with the Light Flyer and Leo Copter
 bonus jets. Note: Use Unlimited, Mirror or Reverse modes.
 
 The Fly jet
 
 Successfully complete the game with the Foo Fighter bonus jet. Note:
 Use Unlimited, Mirror or Reverse modes and destroy all the balloons
 in the bonus level.