Amazing work! You did a great job, I loved the graphics and the chess-like features of this game. It's a very interesting idea, and it feels more like a real game than a concept, with a few things left to polish. For example, I'd add finishing (kill) animations, as if it were chess from Harry Potter. I think it will bring fun in game. Also it would be nice to have more interactive tutorial.
Good luck with this project <3