A cool concept. I really like the idea, but I had a lot of trouble figuring out what to do. I agree with the other commenters that it would greatly improve the experience to see the cards moving when I drag them. I really wasn't sure at first if anything was actually happening, or if I was meant to click to select and then click a plot to apply the card. I think if you work out the UI issues to make it easier to understand, it will be a great game.