Fantastic entry. I loved the sound design in these. Let's see:
Ville de la laine: great story telling, i enjoyed a lot the development with different parts: intro, arrival, action/combat, expectance/contemplation and finally the ending. The rasping growling sounds at the intro work great, and also the bells signalling the arrival to the city were awesome. Everything feels not only exotic but also alien, as you seemed to be aiming for with your art. Track packed with ideas.
Perdu dans les ruines: I loved the whistle kind of sound, and all the rumbling, crumbling athmosphere surrounding me. The steps half mechanical half organic in the background provide a great base, and the echoing birds chirping have great sound design.
Last but not least, beautiful thumbnail art, which reminds me of Moebius's work.
Good job!