When on the title screen, press , , and simultaneously to reveal the "Extra Game" option. This is a harder version of Kirby's Dream Land, filled with tougher enemies and bosses with new moves. If the main game is a casual romp for new platforming players, this mode is for the seasoned veteran of these kinds of games.
When on the title screen, press the , , and buttons simultaneously to reveal "Configuration Mode." Using this you can alter Kirby's vitality in the game, adjust the number of initial lives, and play music and sound effects from the game.