I'm a bit confused because it ended after the first fight and brought me to the "too lazy to make save/load management lol" page but I feel like I was able to get the "core mechanics/general feel" of what you're going for from my one battle and a few stops.
I think it has a great foundation. You've put in the effort to get the pieces there and while the balancing is still in the works the general fun of deciding what to remove, improve, change up and how to work around the constantly incoming creatures onto the battle gives me Wildfrost vibes in a good sort of way.
My only concern that I'd really have to play more to get a true feeling out of is part of the mid/end parts of battle where you have all your cards out. Taking comparison to Wildfrost again you have only four slots to put down creatures which after they are out it felt like I was just sending them back to the discard and placing down another one I had drawn. There just felt like there was less choice there and that I was just "rotating in the next friend with full health". I think if you can have a bit more player agency during the battles, either via spell cards or row manipulation tactics or something would be awesome but ..yeah you're the developer not me ;)
I really like how this is shaping up. Will definitely follow and can't wait to see what shakes out.
Edit: Also as a heads up your discord link on your profile page is now invalid