It took me a little while to understand wtf is going on, but thats probably because i haven't played Battle Network.
core gameplay is good. i like the deck building elements - the game feels fast paced while also offering strategic depth. good stuff. i can't really offer any advice as to specific details or balance because these kinda games are a little out of my depth, but i just wanted you to know it feels nice and satisfying at a baseline.
i don't know if there are more levels outside the starting area on the blue tiles with checkerboard background, but i think fleshing out your world design is gonna make this into something that really pops