Continue game play:
Enter CNT as initials on the high score screen. Game play will continue from level 7, if the last point played was at levels 7 through 12. Game play will continue from level 13 if the last point played was equal to or greater level 13.

Hidden options:
Enter _MD on high score screen, where "_" indicates a space. Game setup options will appear on the title screen. Note: Enter MD_ for the Japanese version of the game.