Thanks for all your feedback, folks!
Here are some closer pics (sorry for the blurriness, I still do not understand all the features of my camera)








Concerning the roof, yes, I used some plastic straws; I cut them into 0,5 cm long pieces and glued it to the roof (made from balsa wood). Then painted with acrylics.
The walls (made from cardboard) were later covered with the stones, made from cork, and painted with acrylics.
The windows frames are made with some plastic precints and pinewood strips. The curtains are made with fabric.
The door step are made from pinewood strips, covered with spackle, and painted with a mix of white/gray/sand acrylics.
The hanging light is schratchbuilt.
The figures still need some work on the faces. The paint frame is an small peltre photo frame, covered with a light coat of matt enamel, then treated with an hb pencil.
The floor will be a layer of plaster. Later I will carve the cobblestone pattern.
Again, thanks for your feeback. I will post some update photos.