Twines/text-based games don't have pictures most of the time, since it's a text-based game
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That would be difficult for the person making this game, because of the character customization and how it affects how other people in the game look, that would take a lot of coding and drawing/money (since not everyone can draw over and over again).
This is, by no means, me trying to disagree (Twine games can look nice with visuals!), but I'm just giving a reason as to why someone wouldn't have pictures in a demo.