How to change startup scene in built game/ change build settings

Hey guys I was just wondering if there was a way using a script or something else that could change the scene a game starts on between two different playing times? If it isn’t clear what I mean, I’m saying that I want to be able to change the title scene/ startup scene when the game is run different times, or just change the build settings in a created/ built game…
If there is a script that does this, I’d prefer it to be in javascript.

Can’t think of any scripts except having a empty start scene which would run a script that takes care of this. Possibly just have a config file from which you read which scene to load and switch to that one,