Well, I've learned an important lesson regarding menuing in Harlowe. Don't set variables inside menu passages. I've also found some resources online including Tweego templates, SugarCube templates, etc.

I've also developed some interest in learning SugarCube, but I'm not entirely sure I have the programming chops for it.

I'm spending some time looking over [this][1] often-cited introductory material on Twine.

In the current story I'm writing, I've been able to figure out how to advance the story both by clicking on links (the hallmark of Twine) and by just clicking on or tapping the screen.

Here is the Save/Load code I'm currently using:

<div id="text_centered"><small> 
    {(link-repeat:'[Save]<saverepeat|')[
        (if: (save-game:"GameSlot1"))[
            (replace: ?saverepeat)[SAVE AGAIN!]
            (dialog: "#### Save Successful!")
        ]
        (if: not (save-game:"GameSlot1"))[
            (replace: ?saverepeat)[Save... Again?]
            (dialog: "### Save Failed...", "Bummer...")
        ]
    ]
    (link-repeat:'Load')[
        (if: (savedgames:) contains "GameSlot1") [
            (dialog: "### Loaded Save", "Yay!")
            (load-game:"GameSlot1")      
    ]
  (else:)[
    (dialog: "### No Savefile!", "Ah...")
  ]
]}
</small></div>