More power-ups: Pause game play and press Up(2), Down(2),
Left, Right, Left, Right, B,
A, Start.
Options mode: Pause game play and press Up(2), Down(2),
Left, Right, Left, Right, A
+ B, Start. Weapons, shields, missiles, and lasers may
now be available.
Full speed and shields: Pause game play and press B(5), A(5),
Start.
Destroy all on-screen enemies: Pause game play and press Up, Right,
Down, Left, Up, Right, Down,
Left, B, A.
Expert mode: Pause game play and press Up, Select,
Down, Select, Left, Select, Right,
Select(3). Collecting power-ups will have no effect on
your ship.
Remove current power-up: Pause game play and press [A, Left] five
times.
Bonus levels:
Level 2 Destroy the volcano towards the top after the ceiling drops
and rises. Fly through the hole where the volcano was located.
Level 4 Destroy the second Re-Bone blocking the narrow passage near
the end of the level. Fly to the bottom of the passage to reach
the wall behind your ship.
