Levelcodes:

 Level  1: (No password needed)
 Level  2: (No password needed)
 Level  3: (No password needed)
 Level  4: dontturnaround
 Level  5: yourkingandqueen
 Level  6: maximilliandrake
 Level  7: wheresthedamncat
 Level  8: donteatyellowsnow
 Level  9: forestofblackoaks
 Level 10: (No password needed)
 Level 11: whydoyoubuildmeup
 Level 12: themanatetwosocks
 Level 13: (No password needed)
 Level 14: angrybearsaregreen
 Level 15: sackfullofpotatoes