SF movie with floppy disk, mysterious game and an impact on reality

I am looking for a sci-fi German movie. It is from the 80’s or 90’s. Female protagonist is a young girl. She steals a floppy disk with a game from a store, because she is poor and she hasn’t a money. Then, she plays this game every free moment. The game has an impact on reality and all events from different TV movies or life of her parents.

It could be from West Germany or united Germany, so I am not sure. It is tough to find.

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Somewhat younger: Ben X

If this is not it, do you remember which type of game it was?