Your character - a ball, waiting until they flew out of the turret and the plagues target. However, it's not that easy.
The turret moves in different directions and returns 360 degrees. Enemies are also moving. But I think you'll cope. The sight will help you, it moves along with the turret.
Each level has its own boss. They are constantly ready to launch the ball in response. Wide range balls, a balls journey.
Management is very simple. You need to aim and launch the ball to the enemy.