Interesting idea! I included it in my Godot Wild Jam #17 compilation video series, if you’d like to take a look. :)

This is a really cool concept, I'm sadly really confused as to what I'm supposed to do. A tutorial or small explanation would help a lot!

First reaction as I first clicked on things: what the… ?? But it is actually pretty straightforward.
I like the idea, there is good potential, but of course as it is the experience is a bit monotonous: very few card types, no tension as we never feel threatened. But I can imagine a more fleshed out version with more cards and events being a lot of fun.
Also kudos for doing this alone. I've been there, it's hard :)

It is an interesting proof of concept. Hopefully you'll try to do more with this in the future!