We really liked the concept and found it different and original. We think it’s interesting that it could also work as a physical card game. It’s a very calm game where you don’t have to keep an eye on the time and you can think about your move in a relaxed way, and the music reinforces that state of calm. As a suggestion, when the cards are fanned out, you can see the type of operation by the color but not the number, so you have to hover over each card to see that information. The number could be added in small print in the upper left corner.