This game has such a strong concept and execution. It explores all of the ideas that it needs to and more!
My only critique is that I think you should be a little more generous with the players light bubble. Especially in the stage where you have to back and forth with the guards, it's mostly trial and error restarts until you memorize their rotations, since their sight range is bigger than yours.
The game may have also benefited from a more zoomed in camera that tracks the player. It would better fill the space of the screen, and make the stealth feel a little more personal.
Also, take a few screenshots! You've done some fun stuff with lighting. It should help draw attention to the page.