Top Header Menu not showing in mobile version + Logo issues

Hi,

I am starting my own blog and I am a total beginner with WordPress, so I am looking for help. In my mobile version, the top header menu does not show up. However, in the desktop version it works perfectly fine. What can I do?

Also, the logo should be bigger in the mobile version. Anybody who can help me?

Thank you!

The page I need help with: [log in to see the link]