Defend your castle at all costs and stay King of the Hill. Attacks from all sides must be fended off with flaming oil and catapult fire until the timer is up. You have four catapults and thus four lives. You loose a life/catapult when an enemy reaches your castle walls or when you get hit by catapult fire.
Click, hold and drag on an individual catapult to aim and set the power. Then release the mouse button to fire. Click, hold and drag on the flag in the center to fire ALL available catapults. Use the cursor keys to tip flaming oil over the walls.