Challenge: Although this is a great photo, I think your only downfall is that it does not meet the challenge which called for a natural occuring number.
Technical: Your camera settings appear correct because of the clarity of the keys. Your lighting is great, and the composition looks good too. You may have wanted to spotlight the center key a bit more, as the focus seems to be on all of the keys, even though they are all pointing to the center.
Style: Very creative and fun to look at.
Overall: A great photo that only scored low because it did not meet the challenge criteria.
Interesting photo. I don't see how it applies to this challenge but I do like the arrangement of the keys. The photo totally makes me think of Alfred Hitchcock. I'm not sure if that's good or bad but it definitely sets a mood. I wish this photo was more relevant to the challenge though.
I'm not really sure weather or not to consider this a naturally occuring number. The shot it's self is quite set up, and the key isn't natural, however, it's not naturally suposed to be a number, but it does look like one. I guess I'm going to just comment on the photo its self. The white background is so bright that it's almost consuming some of the keys. it's most visible in the small tip in the middle to the bottom. The background bleeds into the subject a bit. Not sure how to fix it, other than a less harsh lighting or slightly darker background. Focus and clarity are excelent. Very nice focus. Angle and framing/cropping are ok, the shadow distracts a bit. Overall, a decent photo. Good luck in the challenge.