Just chuck in some photos of the build. The project's nothing special, so it all comes down to how nicely you implemented it.
If you are feeling brave. run your site, page by page, through the W3C Markup Validation Service, and fix the errors it reports. Hint: you've got two </head> tags and two <body> tags in that project page. As neither heads nor bodies are nestable, and you've also got unbalanced opening and closing tags, that's definitely wrong and you'll have to fix it before the validator can check the rest of the page.