notpashut-
I looked thru the Mishan Berura re: hilchos Chanuka over Shabbos (it’s only about 20 pages), and there’s no mention of either dreidel or kvitlech.
He does mention a minhag of eating cheese, to comemorate Yehudis killing the general, which I don’t think most poeple do nowadays.
Is it possible that you may have seen another sefer or ma’amer from the Chofetz Chaim where he addresses these questions, either as halocha or as a recommendation?
Gut voch