Cheat mode:- Pause game play and type the best is yet to be to
enable cheat mode.
Invincibility:- Enable cheat mode. Press [Keypad Plus] to
enable invincibility for the Mantas and Walruses.
Note: They may still be destroyed by crashing at low altitude.
Object viewer:- Enable cheat mode. Surrender and press [Plus] or
[Minus] to display all objects in the game.