Level Passwords:

2  MDKMZKCC  
3  BHSZSKTC  
4  ZKTSHKMC  
5  JLPFDKHB  
6  HMDBRKCB  
7  GLDKLKZB  
8  GLPKLKRB  
9  GLDJBKKF  
10 GLPJBKFF  
11 GLDKBKZF  
12 GLPKBKRF  
13 GLDJLKHD  
 

Thanks to Revolution readers Brendan Chivington and Marcus Beosky!