I really like the aesthetics of this game, the world looks and feels great! What I'd like is some form of indicator which power-ups you already have.
Sadly gameplay-wise I think I didn't get too far, what I assume should be moving platforms didn't move at all for me, and the detached shadow could't get further at the far right. Maybe I missed something to activate the platforms? I'd really like to play this game fully.
I think the idea of detaching your shadow and using it as a "second" character is really unique and great!