One of the things I learned early on was to create a global variable called something like "menuToggle" and when an option or menu item is selected I set menuToggle = 1
This can then be used to disable all other screen clickable objects when one is active.
Test for it by using:
On touch object and menuToggle = 0
》do something and set menuToggle = 1
When the user closes the menu or clicks next you set menuToggle back to zero.