Increase Scrolling Speed:
At the title screen, quicly press [Up], [Up], [Left], [Left], [Down], [Down], [Right].
Pressing [Triangle] + [Select]:

Removes Select Menu:
At the title screen, quicly press [Up], [Up], [Left], [Left], [Down], [Down], [Right].
Pressing [Square] + [Select]: Removes the select menu

Score Attack Mode:
At the title screen, quicly press [Up], [Up], [Left], [Left], [Down], [Down], [Right].
Pressing [X] + [Select]: Score Attack Mode