Highlight the 'Sound' selection on the setup screen. Press Select to stop the current song. Press various buttons to play different sounds.
At the start of level 3, boost up and in mid-air, boost right onto the ledge. Kill the enemies and go up the second chute to get the sword.
Highlight the 'Level' selection on the setup screen. Press Left(2), Right(2), Down, Up, Down, Up, A, X. The 'Crazy Hard' selection will appear.
Enter Crystal, Crystal, Crystal, Crystal, Crystal, Banana, Space, Space, Apple, Crystal, Apple, Banana to start at the last level under the hard difficulty setting. Enter Space, Banana, Apple, Space, Space, Banana, Apple, Apple, Crystal, Apple, Apple, Apple to start at the end level under the very hard difficulty setting.
Press A(3), B, Y, R, Select, L, Down, Up, Down, Right. The copyright and licensing screen will appear with the level number.