Idle Ball Flow

Build and extend marble run factories, unlocking new components and designs as you progress through ten escalating builds.

Your first factory starts with a dispenser, a single slide, and one ball. Each trip earns money for your next build. Extend the track with a gentle descent, add a bend, or buy another ball to send marbles down the run more often.

Build toward a machine you want to see in action. The setup guide shows which slides it needs and what to build next. Fit a Domino Relay into the track, then watch a marble tip the first domino and set the whole row in motion.

Hold the screen to make the balls roll faster. Switch to Follow to ride along with the Earth ball, or pull back to Overview to watch the whole factory at once.