Build a Personal Portfolio - 5. The projects section should contain at least one link to a project

Hello friends! I’m on my way to finish the last responsive web design project and I’ve been stuck for one error. So, some help here will be appreciated.

you have put the links inside the iframe tag and it is not recognised from the tests

plus I suggest you use the Analyse HTML tool and Analyse CSS in codepen, you have a lot of errors from there:

i’ll do that right now! thank youuuuuu

feedback on design:
the menu in the top left corner doesn’t work, and everything is off center on small screen: