Like slay the spire didn't give me enough anxiety, the idea here is a boss-rush. The countdown clock was tuned perfectly to give me just enough time to search for the thorns in my hand, which was just about always my preferred card.
I had a little bit of trouble reading the pixel font, but I did like the boss monster's art work. The cards also flew into hand very nicely. I only managed to get a few waves in each time, but nothing it seemed unapproachable. Some more game in there would have been well received.