Ranks

Before being able to move up a rank, you must have the required amount of Experience, and then you must see a Guru. Otherwise, when you die you will have the same amount of experience & gold as you had before.

A note about ranks: according to Mew seeker, "Increasing your rank actually decrease the time that you can fly. At the beginning of the game, you can fly for 30 seconds and then, you lose 10 seconds of flight at the hero and superhero rank."

If it is of any interest, a "chevalier" is a chivalrous man, a French nobleman of the lowest rank, or a member of a certain orders of knighthood or merit. A "myrmidon" was someone who followed Achilles on the expedition against Troy, or a faithful servant who follows orders without question. A "paladin" is a heroic champion, a a strong supporter of a certain cause, or one of the 12 peers in Charlemagne's court. Thanks to dictionary.com for all that stuff.