It's too bad that the links are broken. When the links at the top of the page didn't work, I immediately assumed that this was for an old course and none of the material would still be available.
I only kept looking because I didn't think a useless site would make it to the top of HN. People who find the course site another way might not have a reason to keep looking.
I thought that the single image was a series of links to the different parts of the courses. It's at the top of the page and has 9 distinct icons representing different things that will be taught. It looks a lot like it's there for navigation. When clicking on each of them didn't work, I assumed I couldn't get to the course content.
I only kept looking because I didn't think a useless site would make it to the top of HN. People who find the course site another way might not have a reason to keep looking.