The Best Way to copy your project multiple times is in Blender as everyone knows Save as than + maybe
New game 1,2,3 or more depend how much examples you want Save as,later you go to your folder where is the Build and copy the whole compiled Folder " Build_New game " paste the copy and write behind the number of your copy "1,2,3 or more
otherwise if you want compile it new without duplicate the compiled Folder, its crashs or runs buggy.
example Blender Save as:" New game 2"
example Folder : " Build_New game 2"