I really liked the concept. The game is kind of like a mix of War and Go Fish. I also really like how Gura changes her expression depending on which one you are hovering over. I don't know about later levels, but I think her expression can be a bit less revealing as the game goes on to make that part harder.
Update: I replayed it, and I saw that she stops giving tells on her cards when she is on her last health. Nice touch!