Despite not liking this on Steam or Apple Arcade, I've been playing it some more on Game Pass to see if I can see why everyone raves about it.
I've finished a few runs and got well past level 8 with various different decks. I still don't really get it though.
I thought it was meant to be a poker roguelike, but there doesn't seem to be a roguelike element at all. You don't play, fail, then get stronger on your next run. The unlocks are meaningless, because they can appear at any time. Once you've figured out how it works, it's always the same. Upgrade a particular hand, get the jokers that maximise it, guaranteed win. Starting again with all your good cards removed is boring, I want to keep my custom deck at least.