I couldn’t play this through as of now, but I’m really digging the base idea, so I’ll return for sure.
The idea of combining a sliding puzzle with randomly appearing (or at least it feels like that) cards from a FIXED deck per level is a neat, while keeping a certain rpg/dungeoncrawl feel to the game.
The music is too loud for me on my standard PC settings, so I’d look into that later. Graphically I dig what you have here, overall a cool job! Well done!