Thanks for your response.
Can you please make a test for me : during the game, press the 'F' Key to display the framerate.
I try t setup the game speed (and ball movement) for 25 FPS. If you have a too high FPS, may be there is a problem in the synchronization.

Thank you all again for your advices.It will help me to corrects the problems and I'll try to make this remake better and better.

Edit :
And thanks to your advices and the community, I've decrease the setup file from 20Mo to less than 6 Mo

Thanks again.