A free physics simulation — play it in your browser, no install. ORBITAL: a gravity puzzle. Place planets to bend a comet's path. Built on the Projection Lab WebGL engine, no build step.
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Controls: Drag from the dock to place a body on the grid · Drag a placed body to move it
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Open the live demo Source on GitHubA comet launches across a sheet of spacetime. You never steer it. Instead you drag **moons, planets, giants and pulsars** onto the grid, and their gravity bends the comet's path. A dotted line previews the whole flight as you drag, so you can feel the path move. Thread it through the stardust and into the portal.
Touch works the same way: drag bodies with a finger. On portrait screens the field turns upright.
No three.js and no bundler. Plain ES modules served as static files.
Integration is semi-implicit (symplectic) Euler with 6 substeps per 60 Hz frame.
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