What are the level codes for sniper assassin 4

All the level codes for Sniper Assassin 4 (November 2009):
Level 1: bank heist
Level 2: papa
Level 3: charlie
Level 4: outskirts
Level 5: gigolo
Level 6: par
Level 7: passerby
Level 8: apple
Level 9: horse power
Level 10: hide and seek
Level 11: footloose
Level 12: iron maiden
Level 13: nocturnal