Thanks for the submission. It's a cool concept. It may not be close enough to the castle theme to be eligible for prizes.
😔 But you did see how the inspiration for the swapping mechanic came from chess castling right :v
I suppose.. Several levels removed :D . Note that in castling pieces aren't swapped they are moved to different squares from when they started. If you put a castle in the background we would have accepted it. Calling it Castle Swap or something.