This is a fun take on the roguelite card game. It has a number of unique mechanics going on. It would be nice to be able to use cards on self without having to drag them, maybe a ctrl-click or other button + click command would be helpful. It would also be helpful to be able to see unmodified stats at times, it can be difficult to weigh decisions on passives such as armor when you are wearing several pieces which are all modifying health, armor, and hunger stats. I noticed that after defeating the boss, you can keep playing except the levels are not in order.
It seems that there isn't actually a deck, and you just have an equally random chance of drawing every card in your deck, regardless of whether it is in your hand already, and that there is no discard pile. This completely changes the balance of a typical card game, and leads to some interesting consequences. For instance, I was able to "break" the game by cutting down the deck to a single attack card (which I could draw as many copies of into my hand as I like), and then other cards which could be played freely outside of combat. See the images below for an example. This could have been done better with just Steak++, Health Potion++, and Amputate, I think. It essentially creates a nearly-infinite health loop, going on until your hand fills with combat cards. If enemies scaled more then this could be stopped, but that would probably punish "normal" decks moreso. I eventually let my character die so I could end the game and see the stats, otherwise I'm pretty confidence that this could have gone on forever.
By the way, this game has enough cool and unique stuff going on, that I hope you would decide to change the "plot" to something more original if you continue development. As I'm sure you are aware, it currently has nearly the exact same plot/story as Slay the Spire, being in a dream/nightmare and fighting a heart. I think it's a nice homage to StS but this game could really stand on its own.