I'm not super into Solitaire, but I gave this a go. Sprite art is pretty good. I'm glad the tutorials are there, but I think they should be implemented into gameplay rather than just tooltips. Might be a pain to make. Skill descriptions don't give me enough detail for what something does or they're a bit difficult to understand. Some of the sprites have weird lines around the edges. If this is a Godot game, try disabling mipmaps for the sprites. It's pretty neat.