Composition:
I really like the composition in this shot! I like the fact that the candle is inside a square panel, perspective wise. What I don't like is that you can see the walls on the sides of the door frames, which are a bit distracting to the eye. Without those I think it would be better.
Background:
As I stated a bit earlier, I think the door frames are a bit distracting with the bright walls. the Squares which are in the background are pretty good, and fit the challenge. You got a bit of artifacting in the window pane right behind the candle, which is also a bit distracting.
I think this fits the challenge very well, and that your score is a decent one and reflects that most did as well. I think you over exposed the flame of the candle a bit, which is hard to deal with for any photographer. Well done, I look forward to seeing more of your work in the future!
Composition: Good
Technical: Not too keen on the fairly bright r-hand wall. Unbalances pic slightly? Mirror frame looks jagged too? :-/
Meets challenge: Yes
Overall impression: Good idea/pic let down slightly by lighting. 6