Nice idea, but i don't know exactly what the goal of the game is. There seems to not be any challenge in this game - is it just about sorting cards? If it is, there could be some challenging in game, like a requested time limit to sort all cards with no mistakes/or only with few mistakes, or something like that, to make game more engaging. The concept has some potential anyway, and learning and getting new cards in play with functions also fun.
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We planned that actually! Our goal was to have a round-based system with 10-12 cards at a time and many more types of cards that each had effects when dragged/collided with other cards. But this was our first ever project and we ran out of time. I do think we might continue development though. Keep an eye out for an updated version! Thanks for the feedback!