I’ve been searching for some GUI elements for the Shadow Monsters tutorial series. In particular I need buttons for moving a selection left or right. I went to my go to site, Open Game Art. I will be going with some graphics that were created by looneybits. They have a pack of graphic user interface of buttons that are pretty sharp. The link to the library is https://opengameart.org/content/gui-buttons-vol1. Here is a preview of the buttons.