I’m no expert yet, but if I navigate the theme as a user, I can find some minor things that I’d like the theme to have or to change. I hope my feedback helps you, so here’s my two cents.
First, I don’t like that when the menu is open, you can’t directly click on any link on the page, you have to click once to close the menu and then you can navigate. What’s the point in keepeng the content visible if you can´t interact with it?
There’s no link to the homepage when you are in one of the internal pages, so, you have to click on the X button to go to the homepage and that’s not intuitive.
I would like the menu items visible at all times, so if this were my resume, the people seeing it can check, at any moment, what info I’m sharing with them and navigate trough it without trying to predict what’s next if they click the arrows buttons.
Maybe you can ditch the scroll bar. I think the scroll bar of the browser should be enough, at least for the internal pages.
The animation, when the squares expand last too long. You can stop it sooner, before overflows the window browser.
Edit: I don’t like the menu items centered, I think that makes the menu unbalanced because of the different amounts of space left and right.
I want to say, I really like this theme and I think all thing I mentioned above, are just little details, but maybe those little details get you closer to get the theme accepted.