That's pretty bold color for pencil. Well saturated. If it didn't take you all night, I'd be surprised. I'm not a big fan of graphics but yours has a certain solitude that should have helped you with your insomnia.
I like the nearly imperceptible asymmetry in the presence of such obvious balance. It would be an awesome album cover for the next neo-psych band. I like it, even though I'm not as much into that particular media any longer.
If you're interested in a critique in return, check out this older work of mine in ebony pencil from about thirty years ago:
