Demon Sword Cheats

After the 'Game Over' screen but before the 'Title' screen press B, A, B, A to access the 'Password' screen. Then, press A or B to enter a password to start at the corresponding level.
Level 1-2:
Enter BYY JQ! JER DT+ F*A YD
Level 2-1:
Enter CAQ MKE LNE K?N YEA ID
Level 2-2:
Enter TFE GBN AK? AIJ GAD ED
Level 3-1:
Enter UFE KCN AE (Square) AFB ZWD QD
Level 3-2:
Enter FOF CBF BHB LLQ ALF QD
Level 4-1:
Enter WOF SCF B (Square) A XK- AOH ME
End Level:
Enter GDZ+QT QHA ?KI HGH IE
End Level:
Enter WGI QSH QBQ ?TZ LAG YD