I imported the asset into my project and was fairly surprised that when I compiled my project a demo of GGL was shown. Could you please describe how to get rid of the demo? Maybe it's an good idea to add this as a topic to your documentation. ;) Thanks!

Hi, thanks for using GGL, to get rid of the demo, just delete the demo rooms :)

Well, I tried that, but it broke my project. Thankfully I was in an early state, so it was not that bad. The demo rooms were implemented as the starting point and my project files got totally ignored. It probably was GMS2's fault. :)