I'm making a fake operating system interface in Godot called GodotOS. Here's a sneak peek!

This is around 4 days of work. GodotOS is a proof of concept so I can learn more about Godot's UI systems. It's going very well so far. Right now you can open, minimize, and close windows while browsing folders and text files in user://files/.

My next goal (aside from adding more functionality) is to have viewports in windows so you can play games in your game.