That shadow mode, sound effect and bg music are super impressive but main problem with this game is level design. You already have the great mechanic to play but player don't know where to go and what to do. Difficult spike is too big even at the start of game.
And there is a lot of arrow pointing at all those different direction, it is impossible for figure out what is what. Even still I found two door and some unintended collider there. By the look of it I think your game is like a maze with only one single right Door which was created in one single scene. Still very good and fluid control. With a bit of coyote time and great level design this can be a very good puzzle platformer indedd.