Hi Catherine,
One of the essential skills in becoming a good photographer is learning how our eyes read a picture. Most of us read a picture the same way we read a book, from left to right, top to bottom. What is interesting thoug, is that given the chance, our eyes can easily be distracted or lead off in different directions.
In photography this usually occurs when we give the eye something bright to look at; this can be used to our advantage but if we are careless, we can also let the eye escape from the picture, at which point we are more than likely to move on and look for another interesting photograph.
In this photo the brightest part of the picture is beneath this gazebo. That would not be so bad were it not for the fact that you have let this bright part of the picture bleed out of the frame. Anyone looking at this photo is going to gravitate to this bright area, then suddenly find themselves being lead out of the frame. Good-bye!
If I were making this image I would try to have some dark foreground at the bottom of this image. That will keep your eyes in the frame and keep everything happy.
Now there are two other things that you might do to improve this image. The first is to adjust the geometry of the image so that it does not look like the trees are falling into the middle of the picture. The simplest way to do thiswould be with the Free Transform option – just drag the top two corners outwards a pinch, its that simple.
Then, if I was being really sneaky I would move the moon over to the left slightly, but don’t tell anyone.
Cheers,
Anthony
Image Doctor's edited version