Very creative use of the theme! Really like the atmosphere.
The puzzles were a lot of fun to figure out, you managed to get a ton out of the game's mechanics! There were a few moments though where I had figured out a puzzle, but it still took quite a few attempts to get the exact positioning of the mirrors just right. This is more of an issue with perspective that all 3D games share in some way than it is an issue with your game specifically, and the laser sight helped immensely, but some kind of free cam mode to inspect the level layout without losing my position and aim would have let me focus more on puzzle solving than precision. This issue ultimately didn't hold the game back all that much, it's just my only real criticism so I figured it was worth bringing up.