Build a moving solution
Use the available parts to make a vehicle or machine that responds to the challenge.
GravityLabPuzzles · Physics sandbox
A physics sandbox for your next unlikely invention.
Build a machine, test it, and try a different idea. GravityLab turns parts, motion, and a little experimentation into vehicle-building puzzles.
GravityLab: Physics Sandbox · Android
Free to download; paid features or subscriptions may apply. See Google Play for current availability and purchase terms.
What to expect from GravityLab
Physics sandbox games are most interesting when you can see why an idea worked. In GravityLab, a machine is your attempt at solving the level: assemble the available parts, run the design, then watch how weight, balance, and movement affect the result.
Watch the physics
Pay attention to balance, momentum, and the effect of each part when the machine starts moving.
Improve your design
Try another arrangement or mechanism when the first attempt stops short of the goal.
Who is it for?
For curious builders who like engineering puzzles, vehicle experiments, and finding more than one approach. Start with a simple design, observe it carefully, and change one part before testing again.
Getting started
- Choose a puzzle and review its goal and available parts.
- Assemble a simple machine and run a test.
- Observe the result, change your design, and test again.
Quick questions
Is GravityLab a browser game on this page?
This page introduces the Android game. Use Google Play to install GravityLab: Physics Sandbox; the screenshots here are examples from its listing.
What makes it a physics sandbox?
You assemble and test objects whose movement affects the solution. The puzzle is about how your design behaves, rather than only choosing a predefined answer.
Where do I find current levels and release details?
The official Google Play listing has the current version, availability, and purchase information. Puzzle collections can change as the game is updated.
See the game in action.
Real screenshots from the official Google Play listing.
Published by Rivets Software LLC · Product information reviewed October 27, 2026.