On the high score screen, if you put in the initials ''AAA'', it will change into ''SNK'' (the company that made this game) afterward.
At the stage select screen, when you select a stage, press A, B, C, and D at the same time. You will now begin 4 stages after the one you selected. So if you chose stage 1, you now start on stage 5.
Press Left(7), Right at the title screen. Press A, B, C, D on controller one to view the first four demonstration sequences. Press the same buttons on controller two to view the last four demonstration sequences.