Hey onimike,
The demo playthrough available as an executable is just a packaged version of the asset, all those maps are there for you to explore in the editor.
There are 15 example maps in total, you can find them in “\LSS_LoadingScreenSystem\Maps”
There’s a rudimentary example of a Main Menu / Pause Menu setup - “08_MainMenu_Map”.
Anything you need to know about the config assets, you should be able to find in the demo map “15_PawnHandling_Map” or this documentation.
There’s no Discord, but if anything is unclear, just send me an email (that would be the fastest way to get in touch).
Do you mean to load a level or also just to bring up the loading screen without any level transition?