You should only really need one HTML file for the tribute page - do you have more than one html file, and are you sure that was necessary?
If you want to host multiple pages on CodePen you have two options: create multiple pens and link to them to each other, or use CodePen Projects. You get one project for free on CodePen before having to upgrade to a paid plan for more.
Also, you don’t have to use CodePen at all. If you already have the projects completed, you could look at hosting them via GitHub pages.