Getting these points is pretty easy and I can give you only one hint that you can use.
So, when the green lines are forming the corner where the spawner of the ball is, you can score points by throwing the ball right at the base of the spinning line.
This works for the bottom right spawner too, when the green lines are forming the bottom corner.

If the green lines are forming the top left corner, you should throw the ball (using the top left spawner) when the top of the line is facing the oposite corner (this is the reference spot).
If the green lines are forming the bottom right corner, you will use the bottom right spawner and you throw the ball when the top of the line is facing the top left corner.




If the green line are forming the top right corner, you should throw the ball (using the top left spawner) when the top of the line is at the six o'clock position.
If the green line are forming the bottom left corner, you should throw the ball (using the bottom right spawner) when the top of the line is at the twelve o'clock position.

If the green lines are forming the bottom right corner, you should throw the ball (using the bottom right spawner) when the top of the line is facing the spawner (this is the reference spot).
If the green lines are forming the top left corner, you will use the top left spawner and the top of the line should face it when you throw the ball.




If the green lines are forming the top right corner, you should throw the ball (using the top left spawner) when the top of the line is facing the opposite spawner (this is the reference spot).
If the green lines are forming the bottom left corner, you will use the bottom right spawner and the top of the line is facing the opposite spawner (this is the reference spot).

If the green lines are forming the bottom right corner, you should throw the ball (using the bottom right spawner) when the top of the line is facing the three o'clock position (this is the reference spot).
If the green lines are forming the top left corner, you should throw the ball (using the top left spawner) when the top of the line is facing the nine o'clock position (this is the reference spot).



If the green lines are forming the bottom left corner, you should throw the ball (using the bottom right spawner) when the top of the line is facing the nine o'clock position (this is the reference spot).
If the green lines are forming the top right corner, you should throw the ball (using the top left spawner) when the top of the line is facing the three o'clock position (this is the reference spot).

I placed my mouse cursor where the reference spot is, I sincronized with the line 3 times and then I threw the ball.
And I'm bad at paint :P.

Hope you get the achieves.
Have a good day!