I did not run the tool — page only, which is what you asked about.
Q2: your two product screenshots are in reverse order. Image 4 is the before: Root index missing, 2 blockers and 3 warnings, 5 files, longest path 29/240 Harbor Demo/assets/signal.svg. Image 3 is the after of that same scan: index.html found, no findings, 3 files, 17/240 assets/signal.svg. The 12-character difference is exactly Harbor Demo/ — provably one archive, before and after the unwrap.
So in the current order, the first proof your software exists is a screen where it found nothing. Swapping them makes the gallery read scan → findings → repaired, the order your own 01/02/03/04 slide promises, and lifts image 4's caption — "a real scan of the included example, no game files uploaded" — out of the last slot. That is the most reassuring line on the page.
Images 1 and 2 contain no app at all, so the product first appears at 3 of 4.
Q4: at $2.99 the price is not the friction, not seeing it run is. A read-only hosted scan (findings shown, export disabled) would answer that without giving the app away.
I sell asset packs on itch, so weigh that.