Vertical slide menu and involuntary interaction with background

[MPast.1]

HI All,

I would like to know how is possible block any interaction with other objects when Slide Menu is extended.

I have a screen with three big buttons (2nd - center picture). On this screen I enabled an Vertical Slide menu witch cover more than half screen (3rd - right picture). When I press the blue round buttons these ones change status correctly. Instead, if I press in the middle of this buttons (on red cross), I obtain a reaction on the big buttons in the ground (I mean behind the slide menu). When Slide menu is closed, I found the big button with different status (1st - left picture)

How I can block all these involuntary interactions?

Can I activate some control (on big buttons on Main Screen) when animation of slide menu finish?

How is it possible to give precedence to the slide menu?

thanks in advance