I added the stop function, it allows you to return to the menu. Backdrop selection added, details: To configure the selection you'll need to go to one of the costumes of selectBack, change it to a picture of the backdrop you want it to point to. Then in the sprite under the correct "if" statement you'll need to change the second input box in "set [back_name v] to []" to the name of the backdrop you want it to point to. Remember to do this on both of the two scripts that have this.
Credit to the rest of Style-XI 4.