@Override
    public void onCombatTick(int x, int y, Game game) {
        SinglePlayerGame spg = (SinglePlayerGame) game;
        List<Entity> zombies = filterByID(spg
                .getSquareNeighbors(x, y, 1), zombie.id);
        for (Entity entity : zombies) {
            if (((MortalEntity) entity).damage(3)) {
                spg.addAnimation(Animation.hitAnimationFor(3, entity, spg));
                human.damageDealt += 3;
                human.kills++;
                zombie.deaths++;
            }
        }
    }