Hello, is there any way to open up another page within your page, other than your game(s) pages. What I mean is, my page g-w-i.itch.io consists of my Geo's Quest Series (4 episodes, 1 enhanced repeat - all point & click adventures) I am starting another series of games for the character George - Geo's Adventures (platformer, rouge, 1st person). What I was attempting to do is having the GWI page as the landing page that then breaks out to 2 other pages, 1 for Geo's Quest with its games breakout pages, and another page for Geo's Adventures with its respective games breakout pages. I can't seem to find a way to do that without just creating  a separate  itch site for the new series. Thanks for any help.

No - you can't customize your itch.io pages to that extent.

As an alternative, if you want your creator page to be a bit more structured, you can create collections, e.g. one per series, and add those collections to your creator page.

You could also consider having your own website outside of itch.io where you can have any structure you want.