It's really hard to play, you should consider add a tutorial or something. But cool mechanics! I liked when you can use your own bullets as a platform.
Thanks for the feedback. I made the first level really easy as a sort of tutorial and added the instructions of the itch.io page. What kind of tutorial would you suggest?
I think you could explain that their own shadows are the enemy inside the game, because it did not understand the goal of the game until I saw your description. But, other than that, i think you game is a cool concept! Keep up the good work.