Portfolio Project - Feedbacks please

Here’s the portfolio project I finished from Udacity’s Wed Developer Nanodegree program which I reused for FCC. Feedbacks are very much welcome. Thanks!

I don’t see a navigation bar. From the challenge page:

User Story: I navigate to different sections of the webpage by clicking buttons in the navigation.

Unless you count the Projects and Contact me links, but that doesn’t look like navigation to me.

Otherwise, I like the clean look.