Change Scene of games

So I sometimes have this problem where after making the games when i publish it the games goes directly to game scene instead of main menu and that is because i made the the game on the default scene.Now i cant just delete all the scenes to make the whole game again.So is there a way to change the scenes positions??

Open the project manager and look into your list of game scenes.
The one with the small flag is the scene that loads first when you run the game.
To change that, find the scene that you want to run first. Then on the right side of it, there should be three little dots. Click on the dots and select “Set as start scene”.