The footer does not have enough quality like other sides.
The content is more complex, try to reduce it.
The social icons are not high quality.
Off course you have a good start, but your nav menu is need polis. And also low level headings font family.
More space is not good in between content and sidebar.
It would be better a transition effect on hover for portfolio items.
You have good slider, but the footer is not professional like header.
Maybe you should reduce the footer modules.