Ask HN: Will Reactive Patterns help agar.io?

I spent some days playing the addictive game agar.io From time to time the game suffers some kind of lag. Is in that kind of situations when Reactive Patterns comes to the rescue? Can any provide me with some real world examples where Reactive has been used? Or is just another buzzword to catch on?

P.S. Excuse my F..k.n English, please.