If you were trying to get a spooky effect, then it doesn't really work. The moon is overexposed, it really needs to be exposed so that you can see teh detail, for that sort of effect or it needs to imply, by the effect of moonrays through a woodland canopy. To get the effect you were trying for here, I think you would really need to blend two shots, one with a tree silhouette and one with the moon, with detail. Also, try reading about some of the rules of composition, the most important one is probably the rule of thirds. While rules don't have to be (and in fact shouldn't be) followed religously, it is important that you know the most imortant ones, so that you can follow them when needed or experimnt with breaking them.