Enter the following at the title screen to access the secret option. To access more than one cheat, you must get GAME OVER and re-enter the code.
| Code | Effect
|
|---|
- Down, Down, Down, Up, Up, Up, Left, Right
| - Change ship speed between, slow, medium and fast.
|
- Left, Right, Left, Right, Up, Down
| - Toggle shot mode between fixed and variable.
|
- Up, Up, Up, Down, Down, Down, Left, Right
| |
