The card battle system worked once I understood I needed to click on the enemies, after that it worked pretty well in terms of function. I think what it really needs is more feedback and juice. Like when a lightning shock card is used it would be need to hear like a thunderclap and the enemies play a hurt animation and a pain sound effect. And for some extra juice have selecting a card play some little paper foley sound effect. And for the player being damaged even if you were to just add a single pain sound effect, or just a brief red tint on the screen would help. Though these are just suggestions I do think looking into it would make this game a lot better.
I would also suggest having the players health be visible when walking around, it would be especially helpful when deciding whether to heal or get a new card at the chests if I knew exactly how much health I had. If there's a control to do this, I missed it entirely.
I do like how the music wil change based on whether you're in combat or not.
The movement as others have pointed out is also a little weird, I think wolfheat is right about using Slerp instead of Lerp. And the turn and movement speed is definitely too slow.
I also noticed the "shimmering" effect on the walls, I'm assuming the wall prefabs are overlapping so there's a lot of z-fighting for the textures of the overlapping walls.
For other positives, the assets compiled work nicely together, the card art I think looked good but was too low resolution. What might make it look better is if for the card icon texture files, set the filtering to be linear so it looks like pixel art instead of being blurry.
I think there's a very solid foundation for a much better game here, so I do hope you can improve it further or take the feedback from this year and make something awesome next year.
Good work!