I played your game and can say that it has a lot of charm and is very beautiful with a coherent visual style.
Since the game is in French i couldn't understand much about what was going on but the mechanics seemed understandable.
Because the game is made for azerty keyboard it's not possible to play with a regular qwerty layout - so you must use a joystick.
I would definitely like to play this game (and i think so would others) as a full experience and maybe some more mechanics (apart from the platforming ones). It does give off similar vibes to a game called Rime in the best way.
I understand it's a school project and maybe you're not planning on continuing the development, but I can say its a damn high quality graduation project!!!