I loved this game! I don't even know anything to complain about, it's amazing how I didn't wanna stop playing. Just to have it registered, the best strategy I found was to put the king in a corner and surround it by 3 regular ducks at the start, then throughout the match I'd move one of them out and put another one in the same place during the same turn, in such a way that I can take some ducks around the arena while keeping the king's defense at all times and rebuilding it regularly. I feel way you designed it just allows for a great amount of variety and it's not only super polished but also really fun!