Adding a 17-stage promotion exam system to my hanafuda game in one session

I shipped Shin KoiKoi v0.1.0 two days ago — a free, polished hanafuda Koi-Koi card game built solo with Godot 4.6 .NET in 2 days. (Earlier post: the v0.1.0 release log) For v0.1.1 I added a 17-stage promotion exam system that turns the existing rank ...