I have not resolved my effects problem, when I make the same things in a blank game, that’s work !!
So I have decided to make a turn around, I have made tiny cercles invisible (not in a class) and put the effects on them, in this way that’s work.
I think really there is problems with classes. The appearance property are only complete in one of the object , in the other they are truncated. And when you cancel the class you don’t recover these parameters ? Strange
I think when I finished this game for my grand son who is autistic, I will go to Unity for programming the new ones. Ready is Ok for simple games, when you add some sofistications, the code is rapidly difficult to organise and also to read it.
Anyway, thank’s for your help and also to everybody in this forum.
Take care of you.