Too bad the DOF isn't as centered as the dart. I would like to have seen the closer arc of the outer bullseye in focus too. The place where the dart hits the board is the near edge of the DOF. The lighting is a bit harsh, but this shot is nice despite these "problems" (meaning, this is just my opinion)
Excellent idea. Nice use of line and color. It would have been a stronger entry if your depth of field had been deeper so that most of those lines were sharply focused. It would have been a stronger composition if you had the point of the dart positioned at one of the intersections of the thirds lines.
Seems a little back-focused. With this focus, the focal point seems to be the green just above the joint between dart tip and dart body. DOF should include the dart.