Not sure what you mean with custom menu.
I use the standard menu system from WP, without further plugins.
There are two menus created (main and footer) which I assigned to the menu locations. Smartphone works, Desktop works, only hi-res tablet dies not because it displays the regular page (looks exactly as in Desktop browser), but is not useable with hoovering effects.
Not sure how to grab a screenshot, this is dynamic. I try a short video later.