Box set mock up

This is a rough mock up of the box set I plan to make. I've got the basic features in place, such as the title/author and cockroach illustration. I really like the idea of the cockroach's limbs wrapping around, but in reality, cockroach limbs aren't that long:

So I'll either have to exaggerate it a bit, or come up with a slightly different image of the cockroach. I'm also considering going with coloured pencil rather than entirely digital, as I really like the right cockroach in the above scan. If it doesn't look too out of place with the digital covers, then I'll go for it.