Graviball is a real-time multiplayer web experiment. A white ball falls under gravity. Every visitor becomes a small white hand. There are no accounts, no usernames, no rooms, and no limits. All players share the same space and the same objective: keep the ball from falling into the abyss. The timer shows how long the current session has survived. The record shows the best survival time achieved so far. There is no scoring system beyond time. There are no teams and no communication tools. Graviball is an open gaming experiment created by Giorgi Dolidze.