Composition/Content: Very nice composition with the light areas surrounding the island of trees. I'd like to have seen the tops of the trees, but it's a great image. I kind of agree that it doesn't look like night. The light doesn't have a "midnight" or moonlight quality to it, probably because the sky is too light for midnight. The shadows and blue give it a quiet night-time feeling.
Background:I don't know if it was the camera or post processing but there appears to be a band of blue noise in some transition areas like at the top of the distant treeline.
Camera Work/Technical: The blue filter gives the image a soft focus because of the interpolation the camera has to do with only one color. I think it adds to the mood of the image.
Digital Processing: Processing seems fine. Good contrast.
My Opinion: I gave this image a high score because I like the image as a whole. I think it would have scored better with another "blue" title that didn't have midnight in it and possibly if the tops of the trees showed to give it even more of an island look. Great shot.