there's a way out of the room with the two cubes! the rays of the stars sort of "sketch" the exit and then there's some a section where you have to use the light ray to explore in the dark :) if you're at all interested, I can dm you a build of the game with improved movement speed as that's been a common complaint. I also 100% agree that the mechanic is a bit underutilized, but the puzzle in the dark is my favorite one so I think that'd change your opinion a bit if you played through it and also you'd be a bit more satisfied in general if you made it to the end :p
Thanks for playing and for the feedback; it's super helpful :)