I built this as a reusable game template, with cards used as placeholder and sample content.
Marketplace template — development screenshot 2.
Marketplace template — development screenshot 3.
The sample content was there to demonstrate the template while it was being developed. These screenshots are a few points from that process.
Marketplace template — development screenshot 4.
The completed project was sold to a marketplace publisher. The work here is the template itself, rather than a finished game with all of its final content.