It's an interesting premise for a story, but a little confusing how different narrative elements could be connected without more to play through. I liked the attention to detail on the various dialogue moments with the environmental storytelling and mushroom characters.
If I had to critique anything I'd say that the overlay graphic for the broken mirror made it very difficult to read what was going on underneath on a few occasions. If that could be more subtle then it would feel more like a "nice touch" and less of a distraction or hinderance on paying attention to the gameplay at the time.