Your typography and colors needs a lot of rework. Read some articles and look at sites for inspirations and ways of how it is implemented. Find better fonts
I agree on the colors with subsolar. Also the portfolio does not line up with the rest of the page contents on the right. The services iPad slider does not display any images or it does not work??
Some of the text blends into the background images and it is very hard to read. The team hover is all messed up and the social icons are not lined up to the right of the box. After awhile the animation breaks on the page, when you click on the menu item it does not scroll down smoothly but abruptly. The twitter thing does not display tweets. The contact form is not validated.
There is just too many things to list but i did a few hope it helps.