Level passwords:
Enter these codes at the password screen to access the corresponding levels.
The code symbols are Greek, but here is information on how they can be identified:

Delta - triangle
Phi - shaped like an oval intersected by a vertical line
Sigma - appears like the letter ''E''
Psi - trident-shaped symbol
Omega - looks like a set of earphones

View development staff
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Enter SPNNR as a password.

Level Password
2 TDBKSRQ
3 XL WPMTC
4 NBKSDLV
End SPNNR

Extra lives
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After losing the game, press Left at the "Continue"
screen to enter a hidden room that contains four extra
lives.

Fight ActRaiser Boss
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Enter Xxxx Yyyy Zxxx as a password.
Note: Press Select to enter the lower-case letters.