I think this may be my favorite game. I wish it had some some BGM. I had to pull up some some of my own. But even then, I can't stop playing it. I never played slay the spire myself, (assuming it is based on it) and i was able to get a good handle on it.
Although I think the mana system is a little buggy. I want to gain +3 mana but only get 1 etc.