The perspective is a bit skewed, as it appears that the objects could be stuck to a wooden wall... Nonetheless, the subject is depicted clearly and the photo is well-focused. It lacks something, but is germane to the challenge.
Strange lighting, I think it's too dark, the bright yellow may not help. Items look as if they are floating above a desk. I don't think that's the effect you were going for. Shallow depth of field makes portions of the pen look out of focus. Pen would look better if it had more contrast, no bar code exposed, etc. Keep on dabbling with similar brights on darks, there is a winner to be had in the idea.
Good colors and composition. I would have liked a black background instead of the wood grain from the table it is sitting on, as it tends to draw my eyes away from the question mark.
I really like the post-it note with the question mark, but I'm not too sure about the pen (which kinda seems to be floating in black) and I definately am not a fan of the woodgrain as the background.