About This Game

Real gears that don’t slip in a physics sandbox. Build freely with resizable parts and shapes, solve physics-based puzzles, fuse structures with superglue into stable mechanisms, and engineer intricate contraptions, precision machines, and complex mechanical systems. 

Build real mechanical systems in a physics sandbox where gears truly work.

Design precision machines, engineer complex mechanisms, and experiment with motion, force, sensors, and logic. From simple contraptions to intricate mechanical systems, everything is built from parts you control.

Real gears that transmit motion and force without slipping.

Teeth count, size, and bevel angles are fully customizable, allowing precise mechanical systems.

Resize parts freely to fit your design.

Shapes, gears, and components can be stretched and scaled without breaking physics.

No grid. No restrictions.

Place parts anywhere and build machines exactly the way you imagine.

Follow instruction kits to assemble complex machines step-by-step.

Perfect for learning the systems and building intricate creations.

Challenge your creativity and problem solving skills with engaging mechanical puzzles that push your engineering limits.

Personalize and fine tune every detail of your machines to build truly unique and innovative designs.

Achieve fast, smooth rotations and optimize your machines for powerful, high speed operation.

Fuse parts into a single stable structure with Super Glue.

Unlike traditional physics joints, fused structures stay rigid and stable even in large and complex machines.

Build intelligent machines using sensors, relays, and full logic gates.

Detect distance, motion, and signals to control mechanical systems, create programmable computers, and automate complex mechanisms.

Analog signals allow smooth control and dynamic systems.

Build regulators, oscillators, and mechanical control circuits.