Extra lives:
There are green, red, and blue circular buildings on several of the oval asteroids. Shoot such a building with a weapon of the same color to reveal an extra life.
Super Truxton bombs:
Fire a Truxton bomb and pause game play to keep the explosion on screen. Remain paused for at least twenty seconds to resume game play. The enemy target should be destroyed.
Level select:
Press Up, Down(4), Right(8), Left(16) at the title screen. The sound of an explosion will confirm correct code entry. Press Start to select a starting level.
