Very nice stealthy puzzle game! I really like the concept. I do think the "potions" are a bit forced to fit the theme, but it works well enough. It might be a nice addition to allow the use of the mouse when throwing a potion, it feels a bit clunky to move the cursor all the way the the other side of the room with my keyboard. Other than that, the mechanics feel good and intuitive (altough it did take me a bit to understand that you have to throw potions at other shadows).
Good submission, well done :)