Dominoes indicate falsehood, hypocrisy and that should apply to the people appearing in the dream. Dreaming of winning the domino game indicates vanity, some authority when it comes to problems and enmities, but not in an honest way, which will cause resentment in some and admiration in others, especially in shameless and immoral minds, all of which will somehow manifest in real life.
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As a general rule it is interpreted that childrens games express the desire of escaping worries and it will be interesting to analyze the attitudes of the players in the dream. Especially if we are the ones playing, because if we dream that we are cheating during the game, it could be interpreted as a difficulty to adapt into social norms.