Pretty fun game! Good job!
So many cards to choose from!
I've never played Shadowverse but I kinda understood how the game plays after a few turns.
I didn't understand why my deck wasn't saving until I realised I was adding to my deck cards I didn't have (greyed out).
Suggestion: add a hint somewhere that on the first play the player has to go to the Shop to unlock some cards before they can build their deck to play.
Good game! :)