I played this game on my stream (VOD) and you were there too!
Overall, I really enjoyed playing this game! It definitely gave me Slay the Spire vibes. I'm not a big StS player, and I've only sometimes made it to the first boss, and more often than not, die before then.
In this game, I made it to the boss on the first run (yay!) and had quite a bit of fun doing so. I liked the variety of the cards, and the explanations on the tooltips were generally sufficient that I understood what was happening with the monsters, and what each card would do.
Fun game, and I might continue to play it after FB7! :)