Delay the opposing knights with your bowmen and special attacks until your castle has been built.
The red and yellow buttons are for setting the shooting angle, the green button is for releasing the arrows. Launch the special attacks with the three buttons on the right. You can withdraw bowmen from the battle to help build the castle. Move the joystick up or down to do so. The opponent gains more points when there are fewer bowmen on the castle walls.
Bonus points are awarded for special attacks not used and the condition of the castle walls at the end of a level.