Hey, don't despair.
I haven't forgotten you.
Your graphic already looks good. I have in my mind 2 ideas. ONE is to try to improve on what you have already.
The SECOND one is a different approach...it deals with having the spider in the corner and the web in the opposite corner.
The problem, in my mind, is the restriction on the size...doesn't leave much for artistic work....
But, I'll try to come up with something...if you don't like it, NP, at least someone tried, right?