I enjoyed the challenge to place the mirrors on time. Fairly quick to retry on failure too! I also like your relaxed presentation of it. Great job. I only wish it had some background music.
Maybe I don't have too much expectations and I sort of went with the flow trying to get a feel of it. But no, I did not find the point of reflection unreasonable.
For something that affected me I would point out the moment where the space to position the mirror between wall and (totally not innocent) being is tight, so the challenge is both to place it quick and precisely. But the retry cycle was actually swift enough so it wasn't too much friction for me to accept the challenge.