Thanks!
So far, the customization only occurs at the major limb level, which means each goblin generates with a random head, torso, leg, arms, etc.
As for deeper customization, that is not only doable, but is actually something I'm currently working on for the next version of GOBLINFINITE. You'll be able to reroll specific parts, as well as change the goblin's colors, and more.
Using a system like this, you're only really limited with the amount of art you have. Thankfully we have ROLLINKUNZ who busts out an amazing amount of artwork.
RE: GOBLINFINITE.app Dev Log #1 - Generating Some Goblins