I’ve finished all the campaign now. I’m not sure whether I’ve figured out all of the counter-units and some of my solutions only sometimes worked. The units are quite varied, though some are similar but with a twist: e.g. Pumpkin Catapult’s ammo bounces.
Certainly worth a play as you can overlook the comical gameplay and see it for its tactical problem solving.
P.s. those balloon archers are lethal!