Marble World

Marble World is a physics sandbox simulator dedicated entirely to marbles. Build your own marble runs, races and chain-reaction machines using a broad set of tools and tracks in various thematics. The simulation handles more than 10,000 marbles simultaneously depending on your hardware, with realistic physics across every interaction.

Track pieces come in various forms, sizes and themes for creating unique contraptions, with move, snap, rotate and scale tools for assembly. Decorations and special objects (boosters, gravity pads, spinners) can be placed both for visual flair and as functional parts of your tracks. A painting system covers tracks and objects with customizable colors, and marbles can be personalized with names, skins and special effects.

Construction can happen with marbles already rolling (the simulation continues live), or you can pause time for elaborate mechanism design. Slow-motion and speed-up controls let you observe the physics in detail. Logic systems dynamically change tracks while marbles are running. Race-hosting features let you set up structured competitions, and Twitch integration lets viewers join the race. Creations can be shared with others through community channels.