Alexio cheats and level passwords

I learned this from Quacktendo Power magazine #6 '93 and am sharing it with you |:Y

Pause cheats and level passwords

Enter the desired arrow combination in the pause during the game.
Get the hats, lives or ducky-cola!

And the passwords for the levels:
DUDU - 1 KACD - 1B
PASS - 2 APDK - 2B
PKSP - 3 CUPA - 3B
KUDA - 4 PUSS - 4B
DAKS - 5 SUCK - 5B
ACDC - 6 PUKA - 6B
...
DUCK - ?

I hope this will help you to comprehend all the secrets of
Alexio and pass the game at 100%. Enjoy!