Level Passwords
These are codes to access any level on Normal Mode:
HBLD - Access Level 0
KD4Q - Access Level 1
CNGF - Access Level 2
FLLF - Access Level 3
HDSF - Access Level 4
KGNF - Access Level 5
Level Passwords
8QSD - Last Boss
DBBR - Level 2
GCB5 - Level 3
HCB9 - Level 4