Roll Holds - To Tread The Earth

Inspired by Mortal Engines. You are on board the Gearrunner, run by its small community of 20ish people with a variety of races, personalities, and relationships, you included. This world is home to not just humans, but also furskins(furries) and reptillians(scalies), all of which are among the Gearrunner too. This world takes place after an ancient apocalypse, where the oceans lost 50% of their water content, leaving shallow seas and massive continents in their wake, giving birth to a new steampunk age of massive vehicles. The world is dominated by steampunk "Roll Holds", towns and cities on wheels, scavenging for fuel. A couple "Horizon Rollers" exist, full states, their Roll Holds covering the horizon. Some seek conquest, others are great spots for docking, trade, and diplomacy. There are 30ish story cards detailing the Horizon Rollers, the Gearrunner, and thorough backstories of every character on board the Gearruner. This is my first scenario so leave feedback!