Free and open source app

A line that leaves, turns, and comes back.

Leave the border, cut across the field and return: whatever is left without the Thread is yours. Double the points for going slowly, and double the time out in the open.

CategoryGames

Open the app Source code

Why a second game

Same constraint; a different thing to prove.

The apps we publish have one thing in common, and it is a technical constraint: they run on the machine of whoever opens them and send nothing anywhere. AstroDroid demonstrated that on an action game. This one demonstrates it on something more demanding: a game that has to **measure** — how much ground you have closed off, to the decimal, for a whole game.

A clone of this genre keeps the field as an image and counts coloured pixels. Here the field is a polygon on integer coordinates: the area is exact, the percentage does not depend on the resolution, and the result is the same on every screen. It is the principle of the rest of the catalogue — measure where the data is — applied to a game rather than to a file of readings.

The coin is the starting ritual: games are endless, but saying «this one begins now» is worth something. It is also the gesture a browser needs before it will start any audio, so the ritual pays for itself.

What it does

You cut the field and keep the part the Thread did not stay in.
Fast stroke or slow stroke: the slow one is worth double the area and leaves you exposed twice as long.
Three different threats: the Thread roaming the open field, the Sparks running along the border, and the Fuse eating your line if you stand still.
Shutting the Thread inside a tight pocket catches it, instead of killing you.
Four arenas, islands included, and a second Thread from the third level.
Keyboard, mouse and touch: you point at where to go and the marker goes there, with a dashed line telling you beforehand what will happen.
A table with your name in it, asked for at the end of every game.
Export and re-import the table as a file, so clearing the browser does not take it away.
Works offline after the first visit, and installs as an app.

What it does not do

It does not ask for an account, and has none to ask for.
It does not send the score anywhere: the table belongs to this machine, the way the cabinet's belonged to its own.
It has no advertising, no purchases, and nothing to unlock by paying.
It does not work better online: after the first visit it has no further need of the network.

At a glance

High scores

They belong to this browser. They stay here, and you export them whenever you like.

Data

It stays on your computer. After the page has loaded, the app makes no network requests.

Coins

Endless and free. The coin is the starting ritual, not a limit.

Controls

Keyboard, mouse, touch. The same rules for all three.

Licence

Apache-2.0: the code is what the browser downloads, with no build step in between.

Version 0.1.0Updated 11 September 2026Licence Apache-2.0Source code

FAQ

Frequently asked questions

Is it a Qix clone?

The mechanics of the genre are those, and the reference is deliberate: games where you claim ground by cutting it have existed since the late seventies. The name is not — the titles of those games are somebody else's trademark, and using one on a company site would be a different matter. Here the field has exact geometry rather than a grid, the arenas have free shapes with islands in them, and cuts can go diagonally: differences you notice while playing.

Why is the table not shared?

Because a shared table needs a server to receive the scores, and these apps have none. It is the same choice that makes the game usable with no connection and no account. If you need to compare with somebody, export the file: it holds the whole table.

Does it play well on a phone?

Yes, and it was designed to rather than adapted afterwards. With a finger you point at where you want to arrive and the marker goes there: near a wall it walks the border, out in the field it cuts, and the dashed line tells you which before you lift your finger. The aim point sits above the finger, so your hand is not covering what you are looking at.

Is the slow stroke worth it?

It depends on where the Thread is, and that is the whole decision of the game. It is worth double the area and leaves you exposed twice as long, so the right question is not «is it worth it» but «is it worth it now».

Need the same thing, built for you?

If you have a case where the data stays on the machine of whoever uses it, tell us about it. A person from the team replies, not an automated message.

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