Your goal is to destroy the enemy´s castle with a cannon. Before you fire the cannon you should set up its tangent angle and fire strenght. Use arrows to control it. To destroy the castle you need to hit it 13 times. Hit three towers in the background twice. Hit the castle´s gate twice. You need to remember that you´ve got only 7 seconds to aim and fire. After this time, the cannon will fire by itself. Your enemy may be the computer or another person. The second player uses W, S, A and D.