Can I join more than one game at a time? I've been playing the demo game for the last couple of days and I'd like to join the Beginner's game to see what the full experience is like (but I still want to play the demo still). Is this possible or will it end my demo game if I start a new one?
Yes of course you can.
If you are inside a game world, just click dashboard->change game to get back to the index.
"Unlimited" game worlds, one airline per game world. https://www.airwaysim.com/game/Manual/General/Concepts/#Worlds