To stop the timer in this game, use the DOS utility DEBUG.
 First backup your game to be edited, then type the following
 from the dos prompt:

 ren e:\nm cheater.cht
 debug e:\cheater.cht
 e 377 90 90 90 90
 w
 q

 Then rename CHEATER.CHT back to its previous name.

 Also, try type PSYGNY when asked for password.  Now you should
 be able to skip levels by pressing [Z].