The graphics are great! The music is nice, though the volume might be too low compared to the SFX (I usually have the opposite problem). The cardplay is pretty engaging.
The interface is a little fiddly. I sometimes had trouble placing cards on the mat because the cards in my hand were getting in the way.
Also, I was playing in fullscreen mode, but could not see the entire viewport; for example, I could not see the top half of the hourglass or the bottom of the cards.