Menu and Mobile View

Hi,

if you go here i have customised the theme quite alot as you can see :), but the

1. Menu doesnt show correct on mobile properly
2. How i change background of the Mobile Menu, because very hard to see as you can tell
3. Our menu isnt very large like only has 4 items on it but it seems to go into Mobile Mode to soon. So you have the Logo + Mobile menu very early on, is there a way of changing this?

Thanks
Aaron