This was an interesting game. I think the core idea here is really interesting, but it has some significant issues that got in the way of my enjoyment. I think the game really needs a system to avoid you getting duplicate cards, as they are only a major hindrance. It also seems like the last two cards being re-shuffled between rounds is probably a glitch, and if not, it was confusing and really annoying. These two things combined made it really hard to try and build an effective deck, and whether I was prepared for any given fight felt like RNG. I really liked the idea behind it, but the technical issues got in the way of me really getting into it.
Also, is this a 2D game made in the Unreal Engine? I didn't know that was something that you could even really do. I'm guessing it's not very efficient, though, since my computer fans ramped up trying to play this.