I think that the focus is perfect on the green one, and as I can tell your DOF is intentional, the focus is perfect throughout the photo. The background helps the pins to stand out a bit more. The angle and framing/cropping is great. I like how you have them all lined up. I wonder though why the 4 back ones are so evenly spaced, and the blue one is really far away from the red one? Overall a nice shot. Good luck in the challenge. ~Hbunch7187~
Looks like the gap between blue/red is larger than the others... or is that just the angle? It's the only thing I see wrong. Perhaps a bit more light is needed.
Might have been a little more effective just a little lighter so that the colors would stand out a little more vividly without completely losing the shadows.