Place
Drag parts out of the tray. Some slide along a rail, some you can spin with the rotate handle.
Free - no sign-up - works offline
Build the contraption.
Build the contraption.
Let physics finish it.
Drag a ramp, a crate, a spring, a fan or a magnet into the lab. Press PLAY once and watch gravity carry the ball to the cup. Ten levels, each solvable in under a minute.
Loads instantly in your browser
10 levels
0 sign-ups
~40 s per round
Arcade
20 physics mini-games. A new Daily Lab every day.
Quick games built on the same physics as PHYSICS LAB. Play today's three, keep your streak going and collect all 60 medals. Free, no sign-up, works offline.
- Crane DropTap to release the ball into the moving cup. A clean drop scores double.
- Keepy UpTap the ball to kick it up. Hit it off-centre to steer it. Don't let it land.
- Stack TowerTap to drop each block on the tower. Whatever hangs over is cut off.
- Cannon RangeDrag back to aim and set power, release to fire. Watch the wind.
- Plinko LabMove the dropper, then release to drop a chip through the pegs into the best slot.
- Mini GolfDrag back from the ball to putt. Nine holes, as few strokes as possible.
- Orbit HopTap to leave orbit and fly to the next planet. Time it so you get caught.
- Rocket LanderHold to fire the engine, move your finger to tilt. Land softly on a pad.
- Gravity FlipTap to flip gravity between floor and ceiling. Dodge the spikes.
- Trick ShotDrag back from the cue ball to shoot. Pocket every ball before your shots run out.
- Spring JumpMove your finger left and right to steer the bouncing ball higher and higher.
- Brick BreakerMove the paddle to bounce the ball and smash every brick.
- Rope SwingHold to grab the nearest hook, release to fly. Keep swinging forward.
- Fan FloatHold to run the fan and lift the balloon. Float through the gaps.
- Balance BeamMove your finger to tilt the beam and keep every ball on it.
- Air HockeyDrag your mallet to hit the puck into the top goal. First to 7 wins.
- PinballPress the left or right side to flip that flipper. Keep the ball in play.
- Ice SlideSwipe to slide the ball. It only stops at a wall. Reach the cup.
- Laser MirrorsTap mirrors to turn them and guide the laser to every target.
- Draw PathDraw one line for the ball to roll along into the cup. Ink is limited.
How to play
Three steps, thirty seconds
Press PLAY
The ball drops. Gravity, friction, bounce and every gadget you placed take over - you cannot steer it.
Land it
Get the ball's centre into the cup. Missed? RETRY keeps your layout so you only adjust what was wrong.
Levels
Ten experiments
Each level introduces exactly one new idea, and every one is verified solvable by simulation before it ships.
Create
Build your own level
A full level editor is built in. Make a puzzle, prove it can be solved, and send it to anyone as a link.
Build
Drop in floors, slopes, walls, grip mats and moving shuttles. Place the ball and the cup, then choose which gadgets players get.
Prove it
Beat your own level in test play. Only a level you have solved can be shared - no impossible puzzles.
Share a link
Send it as a link, or publish it to the public gallery where anyone can play it, like it and chase the fastest time. Every level is proven solvable first.
Open the level editor
Or remix any official level and make it harder. Browse the player gallery →
Records
Your records
Your best times stay in this browser. World records come from the global leaderboard.
No runs yet. Play a level and your times appear here.
Global leaderboard: every submitted run is replayed on our server, so a time cannot be faked. Only your leaderboard name is shown.
Why it is worth a minute
No account, no cost
No sign-up, no email, no payment, no ads. Open the page and play.
Installs and runs offline
Add it to your home screen and it keeps working with no connection.
Phone and desktop
Built touch-first with pointer events, so a finger and a mouse behave identically.
Honest physics
A purpose-built solver at a fixed timestep. The same run gives the same result every time.
FAQ
Questions
Is it really free?
Yes. There is no account, no payment, no subscription and no advertising anywhere in the game.
Do I need to install anything?
No. It runs in any modern browser. You can optionally install it as an app from your browser menu, after which it also works offline.
Does it collect my data?
No account, no ads, no analytics. If you use the online gallery or leaderboards, the server keeps the levels you publish and your leaderboard name and times, linked to a random ID your browser creates - never your email, real name or IP address. Details are in the privacy policy.
Can I play on a phone?
Yes. It is designed for a vertical phone screen first, and works the same with a mouse on desktop.
Is there a leaderboard?
Yes. Every official level and every gallery level has a global leaderboard. Your winning run is replayed on the server, so times cannot be faked.
Can I make and share my own levels?
Yes. Open the level editor, build a puzzle, beat it once in test play, then share the link it gives you. The level lives entirely in that link - nothing is uploaded - and the player's device checks your solution before they start.
Share it
Send a friend a puzzle they can start in one tap.
Ready for the first experiment?
Level 001 takes about forty seconds.
Start playing