As mentioned by previous commenters its a nice simple clean image. I don't see the spots that the one commenter spoke on however.
The idea works however I am wondering how it would look if the line was longer and perhaps coming more out of one of the corners.
The shadow of the pencil does work well with extending the line.
The orange of the pencil is a bit oversaturated and tends to take your eye away from the line.
The border is effective in this case as it serves to define the image space.
Focus is good and sharpness is okay. I am wondering if maybe f/8 would have helped add a bit more sharpness. Not sure about where the "sweet spot" for this lens would be but with the angle of the pencil a bit more DOF might have helped sharpen the upper part.
In terms of the challenge? Perhaps a bit cliche but the idea is also fairly well executed.
Very simple but I like it a lot. The shadow continues the lead line. Maybe just a tad OOF on the pencil, but hard to get sharp focus on both the line and pencil.