It's pretty good but it seems a bit RNG dependent, plus, I always feel like when I finally get enough resources for something, I have to sell them before I can use them because I don't have any of another resource I need. This might be intentional or maybe more cards are added later on, but on first impression, it comes off as frustrating. On the positive side it's immensely satisfying when I DO actually get all the cards I need quickly enough and can Kill an enemy quickly. You also should consider an HP system because dying from any hit at all seems a bit harsh. But over all, good stuff!
Thanks for the feedback! The game being quite RNG dependent is a design choice as while it gets some lows, it makes the highs even sweeter. Same with multiple lives.
You can influence that RNG as it's an ongoing trade off on what to sell vs keep based on how far ahead you are on the quest.
Do you sell some spells you need later to open an advanced or expert pack for the chance at powerful cards you need now.
Greatly appreciate you taking the time to leave the feedback!