Levelcodes:

 Level  Password
 -----------------------------------------------
  1-2   Yellow, Red, Blue, Blue, Green, Blue
  1-3   Green, Blue, Yellow, Red, Yellow, Yellow
  2-1   Green, Blue, Green, Red, Green, Yellow
  2-2   Red, Yellow, Orange, Yellow, Brown, Blue
  2-3   Brown, Green, Red, Blue, Orange, Blue