Mobile Website Navigation

Hi, I have selected for there to be an overlay menu for the mobile version of my website but the menu isn't very clean. It opens on when the navigation on the right instead of the left and there is also alot of empty space. As there any way that I could edit this part of the navigation for the mobile version of my wordpress site only? The menu for the desktop site is fine. Site URL : eliteeaglescapital.com