You could manually link them with HTML, but it's an odd link to add on text. I'll go grab an example.
Edit:: Went to a random storygame.
http://i.imgur.com/zkrhQAg.png As seen in this image, the HTML you would have to use in order to place a link anywhere on the page to go to the next page (dependent on the page ID). Of course, this is in the dev console - so it won't look like this to you. Just write <a onclick href etc='complicated link shown in picture'>CLICKABLE LINK TEXT<a>
Here's a quick gif I made of an example of changing the link to go to another page (again, in the dev console - it won't look like colored code to you in the editor). Be sure if you're using the rich text editor that you use the "source" button in order to insert HTML links and code onto the page.
http://i.imgur.com/rx2DlBL.gif
This thread belongs in the advanced editor forum imo.