Congrats on your first 3D game! This was a fun little puzzle--like some others I was able to solve it without using any of the mirrors in the living room area :)
I thought the reflection mechanic was a cool idea and was pretty well executed. The one issue I ran into was that sometimes the mirrors would move slightly from where you had them when you clicked to position them, making it a little tricky to get the beam of light out of the bedroom.
Fun concept that I could see being interesting for additional puzzles. Nicely done!