This was great! I really enjoyed the presentation of the classic "node-toggles-adjacent-node" gameplay, and the card art looks fantastic.
Not being able to see the other card art aside from the Queens and Aces was a little disappointing - what I could see looked great, and I found myself wishing that after completing each suit, a Microsoft Solitaire style end screen could give more screen time to the card art.
I also felt like it would have been nice to have some additional aural or visual feedback when completing a puzzle. I found it difficult to notice a new card appearing in the bottom right once I had 8 or 9 or so.
Those are small friction points in a very solid experience, though! Thanks for doing a Linux build :)