TL;DR the developers of slay the spire created a fun free card game within 3 weeks to explore and learn the Godot game engine. You can play it here: https://megacrit.itch.io/dancing-duelists
Have they posted anything about their experiences developing this? I’m curious on their thoughts of Godot vs Unity. This might be the most established studio to ship something in Godot.
Cassette Beasts was also made with Godot! https://godotengine.org/article/godot-showcase-cassette-beasts/