main menu

Hello, I made a menu to be the beginning of the game. It contains the start button, settings, and the exit from the game. The exit button, I did not work on it at the moment, but now the problem is with the start button and settings. The supposed start button after I click on it takes me to the level menu as shown in the video and a button The settings are supposed to transfer me to the volume menu, control, and the back button, but when I press it, the settings and exit buttons do not disappear and the control button, volume and back do not appear at all, and also when I press the start button, the levels list does not appear on the screen and everything is clear In the video, I hope someone responds to me who can understand where the problem is with them

 

And I hope for a quick reply