Guardian Legend

AAXTIUNY        Infinite energy
AXVAIAAG        Start with less energy
EEVAIAAG        Start with more energy
PAKVELAA        Start on area 1
LAKVELAA        Start on area 3
IAKVELAA        Start on area 5
YAKVELAA        Start on area 7
PAKVELAE        Start on area 9
OVOAKLSV + PEOASLAP     Use up minimum shots
To finish the game using the last code, save your position in the game before 
opening the entrance to corridor 6. Restart the game with no codes 
(turn the power off and back on) and go through the enterance. Then save
the game again. Then restart the game using the codes again.
GXOAKLST        Never use up shots