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   The codes.

   Use the F6 key to see your current key config and enter
 these codes at the difficulty screen.

   For unlimited continues
 UP ZOOM1 RIGHT ZOOM2 DOWN ZOOM3 LEFT ZOOM2 UP ZOOM1.

   Invincibility.
 TURN LEFT TURN LEFT TURN RIGHT TURN RIGHT UP DOWN LEFT RIGHT.
      Correct code entry will result in Invincible Mode being displayed.
      Please note the TURN LEFT key isnt the same as the MOVE LEFT key.
      If you can't make it work, try configuring the TURN LEFT key to Q
      and TURN RIGHT key to E. Then type Q Q E E UP DOWN LEFT RIGHT.

   To select Level.
 UP UP DOWN DOWN LEFT RIGHT LEFT RIGHT ZOOM1 ZOOM2 ZOOM3. 

   Wizard mode.
 At the main menu press Z C Z C UP DOWN UP DOWN LEFT RIGHT.

   No more dragon.
 During gameplay press UP A RIGHT A DOWN A LEFT A UP S D.