Enter "ILOVEU" as a password to unlock all levels.
Enter "MAGURO" as a password.
Enter "DOFEEL" as a password.
Enter "MUSEUM" as a password.
Enter "SUPER" or "SUPERB" as a password.
Enter "MIEMIE" as a password. A silver star will appear during the game in locations where you can collect a bonus life, gold star, or treasure.
Enter "AGES" as a password.
Enter "XXXXXX" as a password.