Level Select Press Left, Up, X, Up, Right, Y when "Press Start" appears on the opening screen. The screen will flash to confirm correct code entry. The level selection screen will appear when a new game is started. (Thanks to Alex1337@aol.com)

Fireworks Successfully complete the game, then return to the screen with the "Start Game", "Load Game" and "Options" selections to see fireworks. (Thanks to Alex1337@aol.com)