A puzzle of weight & consequence
MassReaction
The lab went quiet.
The scales didn’t.
An endless puzzle for iPhone. Drop numbered balls into eight columns that stand on four scales. Every ball shifts the weight — and every shift changes the board. Easy to start. Hard to keep in balance.
Coming soonto the App Store
Enter the experiment
How it plays
Nothing stays
in balance for long.
Every ball has a mass. Columns stand in pairs on four scales, and the heavier side sinks. Line up three or more of one colour in a row and they dissolve. Stack five of a colour in a column and they fuse into one heavy ball. Let a stack cross the carriage line, and the experiment is over. Balance is the whole game.
Screenshots
Notes from
the experiment.
Real screens from the game on iPhone.
The boardEight columns, four scales and two rows of balls waiting above. Under pressureThe higher the stacks climb, the more a single ball matters. 
Pick a power-upWhen the board gets crowded, a special ball can turn the run around. 
Game overOne stack over the line ends the run. Then the lab resets.
Special balls
Twenty ways
to break the rules.
From level 3, a new special ball opens every level, all twenty by level 18. The strongest, the triangle flash, comes last. Each one changes the board in its own way.
Silver starEvery level
Three silver stars in a row clear the whole field, without points. A joker can stand in for a star. A silver star landing on another makes a gold star.
Gold starTwo silver stars
Three gold stars in a row clear the whole field and score all its balls; the multiplier jumps to ×4. A joker can stand in for a star.
HeartThrown over the edge
A ball thrown over the edge comes back as a heart. Hearts match each other like a colour, and a group with hearts scores a bonus. Weighs nothing.
JokerFrom level 3
Fits any colour, a star or a heart, so it can complete a line of three. It also joins a waiting group it touches. Weighs nothing; lines with it score as usual.
MysteryFrom level 3
Blank in the reserve. In the carriage it turns into a random ball: half the time a regular one, otherwise one of the specials already unlocked.
BombFrom level 4
Explodes on landing and removes every ball in the 3×3 square around it. No points for removed balls.
CutterFrom level 5
Removes its whole column, itself included, and the scales rebalance. No points for removed balls.
Colour zapFrom level 6
Removes every ball on the field of the colour it lands on. No points.
TintFrom level 7
Repaints its whole column in the colour it lands on. Masses stay the same, and new lines of three score as usual.
FlashFrom level 8
In the widening triangle below it, repaints up to two random balls of other colours in each row in the colour it lands on.
Colour jokerFrom level 9
Turns every ball of the colour it lands on into a joker. Jokers weigh nothing, so the scales may tip.
Diagonal zapFrom level 10
Removes every ball on both diagonals through the spot where it lands. No points.
Top zapFrom level 11
Removes the top ball of every column. No points.
Bottom tintFrom level 12
Repaints the bottom ball of every column in the colour it lands on.
Diagonal flashFrom level 13
Repaints the balls on both diagonals running down from it in the colour it lands on.
Colour bombFrom level 14
Every ball of the colour it lands on explodes, removing the 3×3 square around each. No points.
Horizontal zapFrom level 15
Removes the whole row of the ball it lands on. No points.
Multicolour zapFrom level 16
Takes every colour in its column below it and removes all balls of those colours from the field. No points.
Tint 3×3From level 17
Repaints the 3×3 square around it in the colour it lands on.
Triangle flashFrom level 18
Repaints the whole widening triangle below it in the colour it lands on.
- Every special ball weighs nothing.
- “The colour it lands on” is the colour of the ball right under it. On an empty pan, or on a ball with no colour, nothing is repainted.
- Balls removed outright by a special score no points. Lines completed with jokers or hearts score as usual, hearts add a bonus, and gold stars score the whole field.
- Some special balls are gifts along the way. Extra packs are optional in-app purchases.
- Endless
- One run that grows harder level by level. No move timer, no stages to replay.
- Discovery
- A new special ball every level, until all twenty are open.
- Records
- A shared Game Center leaderboard for every run.
- Quiet by design
- No ads, no sign-up.
Legal
The fine print.
The records behind the experiment.
Privacy, terms, and the details that matter.