I really like the art style of cards. I myself am a big fan of card games but I feel like the real time doesn't suit that well with cards. However the core idea is interesting but it feels like you should have toned down the scope and polish it more instead of having more features.
What I dislike is the fact that once you have the cards in hand / deck you can't see and plan how to combine them into what effect but I am super glad you "highlight" the possible card to combo when you drag something. Congratz!