Your task in Merge Cannon Defense is to protect the border line from aggressive figures that will launch an attack. Your weapons are cannons and one of them is in position; it will fire automatically, turning in the direction of the enemy. But this will not continue indefinitely. The enemy is gaining strength, so you need more guns. Buy new guns and merge two identical ones to get a more powerful and long-range gun that will not allow the enemy to even get close in Merge Cannon Defense.
