Enter one of the following codes at the options menu to activate 
the cheat function.

Effect                                     Password
---------------------------------------------------- 
Fifty keys                               - 378829
10 extra lives, 50 keys, 50,000 credits  - 736353
10 extra lives and 50 keys               - 098654
Press N during game play for level skip  - 243433

Level Password 
--------------
2     353828 
3     108383 
4     370101 
5     982822 
6     847464 
7     737373 
8     928112 
9     267364 
10    193831 
11    090921 
12    309383 
13    101221 
14    103992 
15    998112 
16    125332 
17    091233