Game launchers don’t autoload levels
Batch files are ugly, no games released by any other engine require you to run them from a batch file
Console commands are also ugly, I’ve never in my life played a game and had it load up a black screen on which I have to enter a console command to load the game. Also, I’m not clear on whether or how a release build can even have the console enabled.
Clearly none of these methods are suitable for a release build. Is it just not implemented yet? What are you supposed to do?
For example, running the 1.11 starter game from its launcher automatically loads a camera panning over a scene. How can you do this without automatically loading a level? If you need to automatically load a level, how do you do that?