A cute, well-thought-out, polished game with fun card mechanics! Good music. Good color choices. Nice retro style! Everything is easy to see, read, and understand. It's definitely one of the more fun card mechanic adventure games I've played.
Because the gameplay loop is simple, some visual vvariation in the dungeon levels would make advancement more rewarding. Maybe some different enemy styles or even slightly different tile shapes would really push the idea that you're going deeper into a dungeon. The art is so cute that it would be great to see more!
Great job making such a solid game in just a month!