This reminds me a lot of Boss Monster, and I loved that game, so that's a good thing! It felt a little random how well I did, but I liked finding weird combos with the cards.
yes, the Boss Monster card game is also one of my favorite games, and it was a big inspiration to how BÖSS works.
Yes, the cards you get are entirely random, as there was absolutely no time for a proper deck building system or similar unfortunately.