While the king went on a campaign to punish a neighbor and drive his army away from the borders of his state, a new misfortune came to the rear. The royal castle was inhabited by evil red balls. No one suspected anything when a small cloud of balloons landed on the castle from the sky, but they quickly dispersed and occupied all the halls of the palace, driving away servants and inhabitants. To drive away the air invaders, they must be shot. Charge the cannon and shoot as the ball leans out into the open window. It will take some dexterity to have time to shoot before shutters shut. In the upper left corner you count your hits in Evil Balloon Siege!