Activate the following cheats by entering the corresponding passwords at the Passwords screen:

CHEAT FUNCTION - PASSWORD
Shooting star goes across background - STAR
Level select, reveal items, invincibiliy - FEEL
Invincibility - CANDY
Miyake color comment - MACCHA
Next game comment - MASTER
No continue limit - AAAAAA
Reverses high score in demo mode - HETAP
Show solar system - VALDI

Activate the following cheats by entering the corresponding passwords at the Passwords screen:

CHEAT FUNCTION - PASSWORD
Level select - "ILOVEU"
Configuration mode - "MAGURO"
Time attack mode - "DOFEEL"
Boss mode - "MUSEUM"
Expert mode - "SUPER"
Reveal items(Silver stars appear where you can collect bonus lives, gold stars, or treasures) - "MIEMIE"
View credits - "AGES"
Disable all cheats - "XXXXXX"
Reversed demo high scores - "HETAP"

To perform a Spinning Star Attack when on a ladder, press 1. You will start spinning around and killing everyone in your path.