Enter the password (the hiragana characters are in romaji) ki i so u sa su ki na to ko i ku ki no u mi se na sa i and Enter (bottom right) at the password screen. When you play the game, press B to see the map of levels. Hold down SELECT and move around with the D-Pad to the level you desire in this 8x16 grid. Press B to warp to the level you are currently selecting.