This is Kari Ann, greetings from the Critique Club: composition: nicely composed, considering such an odd subject.
color: Colors are nice and earthy. i like the greens in the wood, they add a lot.
contrast: nice contrast, really nicely controlled.
focus: love the detail you captured in the wood and sand, the footprints are also a nice touch in focus.
depth of field: good choice using f4, makes the wood posts detail even more pronounced.
lighting: After reading through the comments, I agree with them. The sky is just too bright, and could have been better either at sunrise or sunset.
other: overall, this is an 'OK' photo. I like the subject, and the title relating, but it just doesn't have enough 'WAPOW!' to send me over the hills for it. I think this is where your score was effected. Also, that sky was probably a big factor in the lower votes, and a little distraction is the pole out in the water, perhaps you could clone that out as well. But you defiantly have an eye for unusual yet interesting things, and you compose them beautifully. I hope you achieve your 6+ score goal soon, you're so close! Keep it up! If you have any other questions, feel free to PM me.