Hanii in the Sky/Secrets

16 Continues
At the title screen, press to access the game menu. Then press:

If successful, you will hear a jingle indicating that you now have 16 continues instead of the usual 2.

Password Entry
At the title screen, press to access the game menu. Then press:

If successful, you will hear a jingle and a new word will appear on the menu, Mikonotori (みことのり). Press from here to access the password entry screen. Enter the following passwords for different effects.