The atmosphere is chilling, with great complimentary sounds. The controls are also simple and familiar.

An issue I have is that the interact button can be held down for continuous interaction inputs, which can be helpful for rapidly turning mirrors, but inconvenient if the mirror angle is overshot or when accidentally switching on/off a nearby light. 

A second interaction key for turning mirrors in the opposite direction would be great for speeding up puzzle-solving too.

Also, it's sometimes unclear which symbol pillar the player should light up when there are multiple of the same symbols on different pillars. For example, I'm unsure why this configuration opens the door:

But this one doesn't:

Despite them being the same symbol.

Overall though, impressive project. Excited to see more from the team in the future.