This is a really excellent short experience with fantastic presentation. Voice acting really stands out in jams. The music is fantastic and I love the art style. Having a few frames of movement on the character sprites really brings it to life, and the card art art is great. You also have fantastic audio and visual feedback on player actions as well.
The only real feedback I have is an in game tutorial would have gone a long way, however the game is simple enough that if you have card game experience you can figure it out pretty quick.
Excellent job!