Looks intriguing! I’m in love with the art style! It doesn’t distract and provokes a spooky atmosphere. I like the simple UI design, although I must say I’m not a huge fan of the blue dot, but that’s just personal preference and its color does stick out. The game does look really dark in some areas, making it hard to see anything, although that might just be due to YouTube’s compression. The writing I cannot critique because I can’t speak French 
I also like the subtle sound design, the quiet ambient music emphasizes the atmosphere. Also the load sound the door lock makes when you get the code wrong breaks the silence in an uncomfortable way, making you wish you got the code right.
So far, I really like where the project is heading and if I get the chance to playtest a later build, I gladly will!