Thanks! Super weird, I tried multiple times. Yes, the internet is definitely having issues. The other problem (sorry, this is new to me) is creating a new category. I tried making two, not sure if it worked. (For "Game Info" and "Enemies") but I'm not sure how to start populating the page.
You describe the page by editing it, just like you did with "Test" on Category:Enemies. To get pages to show up on the category page, you have to go to those pages and add the category. There are at least 3 ways to do this. Both the Visual and Source editors have category widgets that let you add categories, and every page has an Add Category button at the bottom.
Typically, infoboxes are used to display game stats on a person, place, or thing, and it can be set up to automatically add categories based on the template used and the data entered.