"This volleyball player jumps a lot during the game."
Translation:Ce joueur de volleyball saute beaucoup pendant le match.
To build on what Jojo said, jeu is a "game" as in an activity. So Monopoly, hide-and-seek, and backgammon are all jeux. It also refers to a set of things--if you buy a pack of four of something, and the packaging is in English and French, it might say "jeu de 4", and also a deck of cards is a jeu de cartes.
You can't use it to refer to a specific instance of people playing a sport, like the final game of the World Cup or the basketball game you watched on TV last night.