Super fun! The gameplay is so polished and well-thought! I like how there's so much possible strategies already.
Addressing an elephant in the room: the art is very placeholder-ish but the gameplay is extremely solid! I'd definitely be playing something like this if visuals & juice were to be improved.
P.S. it appears that level selection icons are Godot's native buttons. I personally always set Control > Focus > Mode to "None", otherwise there's an annoying outline when you click them.