Refine is an app that lets you find and tweak advanced or otherwise hidden features within GNOME. Mess about with your desktop's theme: it's cursor, icons and fonts. Then, edit the behaviour of your mouse and it's buttons! It lets you change window behaviour, and lets you optimise their functionality for your workflow. To tinker with GNOME, download Refine!
You can follow the app's author here: @TheEvilSkeleton
You can get the app on Flathub here: https://flathub.org/apps/page.tesk.Refine