This is a hard shot to get. If you use a higher f-stop to increase depth of field, the moon moves during the exposure and is blurry. If the focus is more on the moon, the palms are probably fuzzier, but that was the way I probably would have gone. Often pictures including a clear moon and other sharp focus objects are composite pictures for these reasons. I think that under the circumstances, you did pretty well. At least there wasn't a breeze moving the trees!
Nice composition, however the softness of the image will probably give it a low score. Unfortunately there are number of very clear (with very expensive equipment!!!) shots of the moon that outshine (sorry for the pun) this one.