Welcome to The Universal World Owners' Manual.
The Universal is a customisable game engine from the early 21st century. Your 'world server' controls graphics settings, game logic and events, and you can adjust all this via settings, configuration files and server-side scripting to create worlds of various different types - from persistent world economies to team-based combat games or floating art galleries. The world server attempts to be flexible so learning all you can do with it is a long process..
If you're interested in old-school game design & development and have a lot of spare time & patience, then you may find building a world rather fun.
Fire up the game, click 'Create World', go through the screens there.
Once you're on your world, F10 brings up the ingame world editor.
Check out the Quickstart Guide for a further introduction to the things you can do as a world owner.