When you click on a hyperlink within the body of a feature you have created, you will notice that a new window tab opens up instead of being navigated to the new menu within the same app window tab. This happens even if this link is internal, that is the new menu resides in the same app. This article outlines why you cannot get navigated to the new menu remaining on the same window tab for internal links and how you can work around it.
The app is by design built in a way that when you access one category menu (let's call it menu A) and click on a hyperlink that points to some other category menu (let's call it menu B), a new tab will open up. If you - when on menu B - use the app back button (on the upper left-hand corner of your app), you will remain on menu B and will not be navigated back to Menu A on the page you were accessing in the previous step.
In essence, using the app back button will take you one level up but always on the same Menu.
You will need to use the browser built-in back button to be able to navigate back to Menu A.
If you want to link pages and link them without having the app open up a new tab, you would have to
2. Use their standard navigation options to create item linked with each other in the app as part of the same category.
In this way you will be able to leverage the standard app navigation menus, that is as the back arrow and button menu options.
Once you build your app using the Info-2 and Info-3 Tier Features options, you will be able to navigate across the various elements of the menu using remaining always on the same tab.
You can also watch this video that shows this behavior.