Hard to get sharp details on that shark kite. The subject just does not jump out at me whether its the kite or the man and your horizon is slightly tilted to the left. I don't know if the B&W worked well here. I wonder what it would of looked like in color. Wish you well in the challenge.
Good concept and I like the B&W. From a compositional standpoint, the elements seem a little out of balance. The group on the right are a little distracting and the man and the kite would have been a little better in opposing corners. Still a nice shot though.