A physics puzzle game
Build crazy chain‑reaction machines.
Set up ramps, balls, ropes, pulleys, gears, motors and electric circuits in Professor Wacky's workshop. Press the big red button and watch what your machine does. Sometimes it even works.
- Free
- No download
- Desktop, tablet and phone (sideways)
Small changes matter here!
How it works
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Work order 2Boing!Get the ball over the wall and into the bucket.
Read the work order
Each level is a job from Professor Wacky: a ball to land, a balloon to float, a crate to ship.
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Place parts from the toolbox
Drag parts onto the wall. Rotate them, line them up, and try again as often as you like.
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Press the big red button
Real physics takes over. If the ball rolls, bounces and lands where it should, you've solved it.
Real parts, real physics
Every part is a photoreal object that weighs, bounces and slides the way it looks like it should.
- Bowling BallHeavy. Knocks things over.
- Rubber BallLight and very bouncy.
- BalloonFloats up. Fans push it around.
- FanBlows light things far, heavy things barely.
- CrateDoesn't roll. Needs a belt.
BucketWhere things are meant to end up.- PlankA ramp at any angle.
- Conveyor BeltCarries things, even uphill.
- TrampolineSends things flying at an angle.
- DominoesOne push starts the chain.
- Brick WallSolid. Usually in your way.
- SeesawDrop something heavy on one end.
RopeTie two things together, over pulleys.
PulleyDrop a weight here, lift a crate there.
Iron WeightVery heavy. Great at lifting things.
ScissorsKnock them and they cut any rope.
ThumbtackBalloons do not like it.
HookSomewhere to tie a rope.- Wind-up MotorTurns its pulley. Belt it to something.
- GearTwo that touch turn opposite ways.
- WinchTurn it and it reels in rope.
- BatteryWhere the electricity comes from.
- SwitchKnock it and the circuit closes.
- Light BulbLights up when it's powered.
- Electric FanOnly blows with power.
- Electric MotorA motor that needs a circuit.
Twelve work orders to start
Each level has its own wall of the workshop. Jump straight into any of them.
- Roll OutPlanks are ramps.
- Boing!Over the wall.
- Lighter Than AirFloat the balloon.
- Assembly LineShip the crate.
- Domino RunTopple them all.
- Snip!Cut the balloon free.
- Heavy LiftingWeights and pulleys.
- Pop!Something sharp.
- Wind It UpMotor, belt, winch.
- Wrong Way RoundGears flip the turning.
- Lights OnBattery, switch, bulb.
- Fan ClubA fan that needs power.
Meet Professor Wacky
Inventor, tinkerer, and proud owner of more buckets than any one person needs. He writes the work orders, leaves hints on sticky notes, and cheers loudly when your machine works.
"If it worked the first time, it wasn't a real invention."