So, first of all, the idea of dice with a vendetta against chess pieces? Wonderful! I also loved the concept of enemies that are weak against certain dice rolls, and the concept of killing the queen was a really smart objective based on the world you've created. I also thought the shooting felt very satisfying.
My main feedback would be to simplify. You have dice and chess pieces...and then also fire, ice and lightning powers? The latter were cool, but they felt like they belonged to a different game. If you were making changes, I would lose those powers in the future, or connect the powers to the dice (maybe you activate you power and your barrel becomes all sixes or something)
Basically, very fun little story, a very satisfying gunshot, and maybe too many ideas. Great work!