Scroll down and you see pictures of the levels. They contain numbers for the order in which you have to kill the fruits.
"Acceder aux mondes parallèles" leads to the parallel dimensions, again with pictures; "La carte des enfers" is for level 54's PD (also known as Hell). The other links are less important for your question:
L'intégralité des quêtes: Quests, their items and their (french) effects
Technique du Cache-ennemi: description of the "hidden enemy" technique (If two enemies pass each other, one goes behind the other. The one in the back is the one you have to kill first for the crystal)
Coefficients de rareté des objets: Rarity coefficients
Le mysterieux pouvoir CRISTAL: Just a few things about
Les Clefs d'hammerfest: The keys, the places where you can find them and where you can use them
Les Pads: The gamepads
Mode NINJUTSU: Well... Ninjutsu mode

Time Attack: I guess you know what it leads to^^
Nous aider à completer les astuces: Help us to complete cadomax.com