[fsavoie]

I've unlocked back my level this morning (I've locked it last night to work again on it).

And I would really appreciated some comments on it from someone who hadn't try it before. Because I had a comment that it was almost impossible to find out what to do in the level (even after fixing the issue Cymbole found last day)... but now I've added more explanations (way too much in my opinion but it seems to be necessary).