The following three codes will give you 14 ankhs, 8 hearts (that's one more than they said possible), and give you access to all the levels. I even give you a choice of weapon:
fire : AOIMFPIJ
ice : AOEMDPIJ
shrink : AOMMHPIJ
OTTOFIRE - gives U a permanent weapon (Fire ,Ice or Shrink)when U get one.
VITAMINS - Gives U 31 Ankhs (lives).