I loved the game. I would suggest maybe writing in the description that it is arrow keys to move. I had to scroll through the comments to figure it out.
I noticed bug with the "taken by the sea" spell, it might happen with other spells too but when I selected the spell but pressed space to end turn before selecting a target it let my use it in the middle of the enemy's turn, it cost no mana, and it wasn't removed from my hand after using it.