These codes give you 14 ankhs, 8 hearts, access to all of the 
levels and the weapon that goes with that code:
AOIMFPIJ        Fire
AOEMDPIJ        Ice
AOMMHPIJ        Shrinker

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