golden.png
License CC-BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0/
Sampled from "Golden UI - Bigger than Ever Edition" by Buch
Various higher scale icons created based on theme.  Buttons adapted for more scaling and new states created.
https://opengameart.org/content/golden-ui-bigger-than-ever-edition
https://opengameart.org/users/buch

transparent.png
Some elements adapted from gui-fantasy below.

pixel.png
Base theme taken and expanded upon from "Sci-Fi User Interface" by Buch
https://opengameart.org/content/sci-fi-user-interface
https://opengameart.org/users/buch

Repeat fill texture taken from "Seamless Textures" by arikel
https://opengameart.org/content/seamless-textures
https://opengameart.org/users/arikel

fantasy.png
Base theme taken from and edited
https://opengameart.org/content/fantasy-gui-0
https://opengameart.org/users/melle