Murmuration Run
Murmuration Run is a math gate runner that plays in the browser on phones, tablets and computers, for one player.

Steer a flock of birds through one gate of each pair, where gates add, subtract, multiply or halve the flock. A bigger flock flies wider, so rock passes cut off more of the birds outside the gap. At the end of each level a storm counts the flock against a target; after 40 levels an endless mode opens.
How to play
- Steer left and right through one gate of each pairOn a touch screen: Drag left and right to steer through one gate of each pair
- Rock passes cut off any birds outside the gap. Big flocks are wide
- At the end the storm counts your flock. Bring at least the number shown
The game shows these steps as you play, the first time.

Controls
- Drag, move the mouse, or use the arrow keys to steer
- E switches to endless after level 40
Tips
- The storm's target is 35 per cent of the best count any route could bring, never below ten, so a pass does not need the perfect line through every gate.
- Width grows with the square root of the flock, capped at 150 units, so doubling the birds does not double the width; the narrowest gaps are 140 units.
- A multiply gate just before a rock pass can cost more at the pass than it gained, so look a row ahead before taking the big number.
How does the storm decide if I pass?
At the end of a level the storm counts your birds against a target shown in the HUD. The target is 35 per cent of the best flock any path through that level could reach, allowing for every gate choice and rock passes flown dead centre, and it is never below ten.
What does each gate do?
Plus adds between 5 and 25 birds plus the level number; minus takes between 5 and 15 plus the level number; times doubles or triples; divide halves, rounding down but never below one bird. Plus gates are the most common at about two in five, and divide gates the rarest.
About this game
Made by Sucia in Houston, Texas. Built with AI assistance, designed and tested by Sucia. Last updated October 4, 2026. It plays in the browser on phones, tablets and computers, with no download and no sign-in; your best scores and progress stay in this browser on this device. Without a pass, every game is free for 5 minutes a game and 30 minutes a day; an Arcade pass removes the limit. How Sucia makes and tests its games.
Also by Sucia
Sucia Studio, a video editor for streamers, runs on Windows and Linux: record, cut long VODs by transcript and make Shorts. YouEdit, a video editing service for stream recordings, turns a recording into a YouTube video, Shorts, titles and the upload text, quoted in credits before it is made. Streaming on Twitch, Kick or YouTube? Sucia Live makes highlight videos and Shorts from your VOD.
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