Cheats:

 Type them in whenever you need them:

 LENEE   Invulnerability
 LEHAT   Unlimited spells
 LEBUY   Fly mode
 LEOLD   Experience points
 LEGEO   Complete map
 LEPIK   One key
 LESKP   Jump into the next level

 Move the cursor to an eye of the Gargoyle on the main menu, press
 the left mouse button and [Shift] together. Now you can jump to
 any level in the game, even the bonus level.