Levelcodes:

 Level  Password
   1    TYCKPQ
   2    TJYPDF
   3    ZXCVBM
   4    KDZCPL
   5    MHGQZS
   6    SPLHRJ
   7    YPMBCL
   8    SDWZCM
   9    DPWMQZ
  10    LKLPDX
  11    XCSQSS
  12    MPQPRY
  13    JKRTSC
  14    DXCMGH
  15    LPJKHX