You asked for a more in depth critique for your shot, here it is!!!!! =)
The idea is brilliant, now you just need to work a little on the structure of the shot. When I tilt my laptop, I can see all the web , excellent. But as a standard screen shot, only the first 3-4 lines come out.
Your spider is a little out of focus, which has been discussed here. You need to have your main subject tack sharp. You could play iwth your spot metering for this on your camera, or choose to have the on board flash pop for it. Covering your on board flash with layers of tissue paper would give you a difused light which may have helped bring out the spider and web more.
WHen shooting the moon, you have to remember that it is considered the same brightness as the sun , so you have to compansate for that as well in your camera. If you had this camera on a tripod and a lower ISO and faster shutter speed you will find that you would capture more of the moon details and with the flash some more details of the spider and web.
In post processing, sharpening, exposure, shadow/highlights, contrast, levels would have made a bit of a difference.
If you can find this spider again with the moon behind it, i would love to see this shot redone.
Thank you all who voted and commented. In this series of photographs i took, the spider was very much in focus, but the moon was so bright and overpowering that it did blow it out. I have a couple where the spider was outside the moon, or half inside and half outside, and the difference was quite a bit. I thought of submitting one of the other ones, but the "ripples" didnt look right, or didnt appear.
Overall, I am happy with this. Its my first entry. I think Im hooked, haha.
Thank you all once again, and i hope to learn more from your comments.
I sooooo hate spiders...give me lizards, snakes or rats...but no spiders. I wish that this was in sharper focus with more detail on the spider (or not...)