because I have to ask, is there a place on scalablegfx where they explicitly spell out the licensing terms for the art there?   Clicking around I can only just find lots of statements about how it's all free but nothing concrete like 'licensed as CC-BY' or 'Public Domain', etc.

Anyway, nice pic!   With that big needle she looks scarier than a Silent Hill nurse!

You're not the single author, therefore you should credit mauriku (https://opengameart.org/users/mauriku), who produced that art, due to scalablegfx<REMOVEME>com/terms-of-use