Invincibility: Choose the "S.E." selection on the options
menu. Press B to play the "He Runs", "Japonesque",
"Shinobi Walk", "Sakura", and "Getufu"
songs (in that order).
Unlimited weapons: Set the "Shurikens" selection on the options
menu to 0. Set the "Sounds" option to "Shuriken".
Highlight the "Shurikens" option again and the 0 will
change into the symbol for infinity.
Bonus points: Complete a level without throwing any shurikens to
receive a 30,000 point bonus.
