For up-to-date information please see the Itch.io page for this project (including playable HTML5 build), here: https://sambigos.itch.io/cardsncastles
Cards'n'Castles is build with Godot 3.2, and developed by Sam Bigos, a games industry engineer based in Brighton, UK, who is doing his first GameJam for fun, as a learning experience, and as an escape from the tedium of professional game development.
Thank you for your interest!