Level codes
1. OMAAEBIA
2. NAABEBAI
3. ENAIAKBI
4. PEIAIBBA
5. KFCACICE
6. AFICBAIM
7. NGIAIBJJ
8. EHIIAKAC
9. NIIAIBKB
10. AHICBAJE
11. LOCACMGI
12. KACACIIM
13. OAIAIDLB
14. ELIIAODC
15. OEIAIELJ
16. OGIAJEEB
17. AHMCBCMD
18. AJECBDEF

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).