Cool concept! I liked the art, especially of the cards and the little intro cutscene.
However, gameplay wise things could be a little clearer. Some visual or auditorial feedback when using cards or when an enemy attacks would've been nice, because I wasn't always sure what was happening. Maybe I overlooked things but once I lost 2 atk when the intent said -1 atk, and I had enough resistance to overcome a rage attack of the Mole King but I still got Game Over.
Other than that I do think this has a lot of potential if your team decides to keep working on it!