In this game, you must destroy a castle with a canon as much as humanly possible in 60 seconds. Once the canonball explodes, it will cause great damage to the nearest bricks, but less damage to the ones around the impact. Once a brick is damaged, it is destroyed no matter the power of impact it suffers.
To look around you, simply move the mouse in the direction opposite to the one you want to look. To shoot your canon, click, hold and release your mouse button. The longer you hold the button down, the more powerful your shot is.