Nice colors here. Focus is on the design in the fishbowl, and the shallow DOF puts the face a bit out of focus, but that works OK here. Exposure is great, making a nice low key background with subtle detail. Composition isn't bad, but I find the bright arc at the top distracting. I think it would work better if a bit was cropped off the top, showing the bottom parts of the arc on either side but leaving the the middle connecting part to the viewer's imagination.
Although technically fine and initially interesting, this picture really doesn't hold my attention. It meets the challenge, and is certainly not a bad photo, but not a very memorable one either. I look at it, think "cool photo", then go on to something else.
Concept works, colors are fine and the image is not overexposed.
Viewers will not be able to figure out what the fantasy is and that may hurt it in voting.
On the technical side the head is tilted clockwise considerably. This is a distraction that will hurt it in scoring. Unfortunately the only way to correct it is to reshoot after repositioning the head in the composition.
Ill race you to the brown - im headed that way anyways - this is even borderline on the rules which say your picture can't be of another work of art - putting the halo behind his head doesnt make it much more interesting but it does make it your own creation.