Scene looks great mate.. I agree with M might try to have a few spiders move in a few more directions. That would really spruce it up.

My only real crit is the ground has a weird shimmer..

Its a light thing. In a scene its always good to have only 1 light that has emit specular checked in it attributes, all the rest can be check off

That should get ride of the shimmer and make the ground look more solid...