March 17, 2026
Click. Spawn. Chaos.
Gummy Geometry
Wobbly physics toy sparks joy, rage, and retro flashbacks
TLDR: A playful physics playground lets you toss shapes, ragdolls, cars and more into chaotic motion, but users are split between joyful nostalgia and complaints about jitter and Firefox glitches. The creator chimed in as one player reported a hilarious “transporter accident,” turning the comments into the real show.
Gummy Geometry is a clicky playground of falling boxes, ragdolls, cars, and even “Mario Galaxy” gravity—basically a digital toybox where everything bonks into everything else. The vibe? Chaotic fun, until the crowd started arguing over the wobbles. One sharp-eyed commenter called out the math behind the motion—think the “brain” that keeps things stable—saying it’s too simple and causes that telltale vibrate-and-twitch dance.
Others didn’t mind the shake. One fan said it’s “twitchy but fun” and immediately got washed with Amiga-era nostalgia, dropping a link to those classic demo-scene visuals from the 90s (video). Then the Firefox faction arrived: reports of flickering circles and no dragging turned the thread into a bug triage. And the day’s best story? A user who clicked without instructions and created a Star Trek–style “transporter accident,” spawning a shape inside another until a cursed Franken-shape jittered across the screen like it was trying to escape the simulation.
Just when the peanut gallery got loud, the creator popped in—“didn’t expect to see my implementation here :)”—turning the thread into a surprise AMA. So yes, it’s a wobbly wonderland: half delightful toy, half physics gremlin, and 100% comment-section gold.
Key Points
- •Gummy Geometry offers numerous interactive 2D physics demos embedded via CodePen, with on-screen FPS, body counts, and step indicators.
- •Scenarios cover rigid-body interactions such as falling shapes, stacking tests, pendulums, wrecking ball impacts, Newton’s cradle, dominos, seesaws, and pinball.
- •A Constraints Showcase presents six built-in joint types: PivotJoint, DistanceJoint, AngleJoint, WeldJoint, MotorJoint, and LineJoint.
- •Mechanics-focused demos include a Theo Jansen–style Strand Beast, rope bridge, side-view and top-down car simulations, conveyor belts, and a platformer with one-way platforms using PreListener/CbType.
- •Advanced examples demonstrate orbital gravity, cloth simulation with spring-connected particle grids, a funnel flow, and pneumatic soft bodies with pressure-based volume conservation.