Deck building dance off game "Dancing Duelists" has been released recently. It is available DRM free; has a native Linux version; uses the FOSS Godot engine; and is currently free of charge. https://megacrit.itch.io/dancing-duelists The developer's official site is here: https://www.megacrit.com/ They also have a Youtube channel: https://www.youtube.com/@megacrit5453