I think this level needs to be looked at because it does not play the way that it was originally written. Chocolate was removed from this level a while ago. There used to be an algorithm that allowed the player to get the dragons to safety without them getting trapped in the corners while there was chocolate and I also did manage to pass it without using hand switches before the new fishes were introduced as well, but I cannot achieve that at all by any means now. I wonder if the fish change has now terminally broken this level.
@QueenB please could you ask them to look at this level. If nothing else this one would be perfect for someone to deliberately fail repeatedly to gain +255 extra moves and then collect thousands of purple candies before playing the hand switch to finish the level. I think King might prefer to prevent this method to collect lots of purple candies on one level, so this is probably an oversight and not deliberate.