Great sharpness and depth of field, but I think it would be interesting to leave more negative space above (maybe below, but I think I'd prefer above) to both emphasize the smallness of the subject, but also to move the subject out from the center.
I like the super-shallow depth of field, but it leaves me wondering if it was achieved with aperture or post-processing. The panoramic-type crop doesn't seem to suit the image very well to my eye. I'd like to see a more creative arrangement and composition rather than the straight line. 4.