JezzBall is a computer game in which re-and-white balls, referred to as atoms, bounce about a rectangular field of play, or room. The player advances to the next level (with correspondingly higher numbers of atoms and lives) by containing the atoms in progressively smaller spaces, until at least 75% of the area is blocked off. One gains a bonus for eliminating more than 75%, which is calculated from the percentage over 75% that one manages to block off. One must do this while racing against the clock. It is similar to Qix, which was released during the Golden Age of Arcade Games.