menu problems tablet in landscape

Hello, The menu in toerfiets.nl looks fine on the desktop. On the tablet in portrait mode it also looks fine. On the tablet in landscape mode the first submenu is visible, but the sub-submenu isn’t visible. This is because the menu item “routes”, the sub menu contains the four points of compass and the sub submenu the routes in different categories of length. Now the sub submenu is not visible in landscape mode. I already replaced the menu item to the right, but this isn’t enough. If it is possible that the sub menu items are placed at the right of the menu instead of left, that should be great. Kind regards Hans Hagmeijer