I remember playing this game when it was impossible for me to see the shadow move and i did give feedback on discord, good to see that you added the light & the shadow can be seen!
I would give this concept a high uniqueness tbh which is super good due to the implementation of sort of a spy x spy vibe!
Hard to fully enjoy the game when you control both the characters but that may just be me. Honestly this is a great entry imo. Well done man!