It'll only be a set of rules, so there is no world building going on. But being an illustrator I must add pictures. Wouldn't want to go too generic even if it is a generic rules set. A few of my earlier attempts at miniatures games have been post-apocalyptic in setting. So if it was set in a world or back story it would be a fantasy version of Mad Max. A bit like me; Not sleek and neat, but fat and scruffy.
(Wow I just found out how to align pics right. Not to use the text alignment tool, but the obscured picture settings that appear IF you click the pic in the editor...)