This cheat will allow you to start at any mission in the game by doing the following:

1. Go to the option screen and highlight PASSWORD and press Enter.

2. In the space next to PASSWORD type ZZZCYX.

3. A new menu item will appear on top of all of the other options called LEVEL SELECT: to allow you to select 9 different levels to start from.

4. Highlight this new option and use the left and right arrow keys to select a level.

5. Highlight BACK TO MAIN and start the game.