Is Aurora free to play?

Yes. Aurora runs free in your browser with no installs, downloads, or sign-up, on both desktop and mobile.

How do you win Aurora?

You complete a level by tracing every line in the constellation exactly once in a single unbroken stroke, then you advance to the next level.

Is every Aurora level always solvable?

Yes. Each level is hand-authored to satisfy the Euler-path rule — zero or two stars with an odd line count — so a solution always exists.

Does Aurora work on mobile?

Yes. You can drag your finger across the stars on a phone or tablet, and the puzzle scales to fit the screen.

Aurora

Aurora is a calm one-stroke flow puzzle built on the Euler path from graph theory. Each level is a small constellation of stars joined by lines, and your task is to trace every line exactly once in a single unbroken stroke. There is no timer and no score — just an ambient nightscape and the quiet satisfaction of lighting up a constellation.

How to play

Touch or click any star to anchor the start of your stroke.
Drag or tap an adjacent star to draw the line connecting it.
Cover every line exactly once — you can never re-draw a line already lit.
Use Undo to step back one line, or Reset to clear the whole stroke.
Light every line in one continuous stroke to complete the level and unlock the next.

Tips

Look for the two stars with an odd number of lines — start your stroke at one of them.
If every star has an even number of lines, you can start anywhere and will end where you began.
Stuck? Undo steps back one line at a time, or Reset clears the whole stroke.

FAQ

Is Aurora free to play?: Yes. Aurora runs free in your browser with no installs, downloads, or sign-up, on both desktop and mobile.
How do you win Aurora?: You complete a level by tracing every line in the constellation exactly once in a single unbroken stroke, then you advance to the next level.
Is every Aurora level always solvable?: Yes. Each level is hand-authored to satisfy the Euler-path rule — zero or two stars with an odd line count — so a solution always exists.
Does Aurora work on mobile?: Yes. You can drag your finger across the stars on a phone or tablet, and the puzzle scales to fit the screen.

Aurora

极光是一款宁静的一笔画流动解谜,建立在图论中的欧拉路径之上。每一关都是一小片由线条连接的星座,你的任务是用一笔不间断的笔画把每条线恰好描一次。这里没有计时,也没有分数 —— 只有氛围感的夜景,以及星座被点亮时那份安静的满足。

玩法

触摸或点击任意一颗星,作为笔画的起点。
拖动或点击相邻的星,画出连接它们的线条。
把每条线恰好描一次 —— 已点亮的线不能重复描绘。
用「撤销」逐条退回线条,或用「重置」清空整个笔画。
用一笔不间断的笔画点亮所有线条,即可完成本关并解锁下一关。

玩法技巧

找出连着奇数条线的那两颗星 —— 从其中一颗开始你的笔画。
如果每颗星都连着偶数条线,你可以从任意处起笔,并会回到起点。
卡住了?撤销可逐条退回线条,重置则清空整个笔画。

常见问题

极光免费吗?: 免费。极光在浏览器中直接运行,无需安装、下载或注册,电脑和手机都能玩。
极光怎么算赢?: 用一笔不间断的笔画把星座中的每条线恰好描一次,即可完成该关并进入下一关。
极光的每一关都一定有解吗?: 是的。每一关都经过手工设计以满足欧拉路径规则 —— 零个或两个星连着奇数条线 —— 所以解总是存在。
极光能在手机上玩吗?: 可以。在手机或平板上可用手指在星辰之间拖动,谜题会自适应屏幕。