qkc can fly
A free Flappy Bird game — play it in your browser, no install. 「qkc 会飞」—— 用真人照片当小鸟的 Flappy Bird 单文件网页游戏。单文件 index.html 双击即玩，离线运行，零外部依赖。
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Open the live demo Source on GitHub⚔ This or That: Flappy Bird games
From the README
index.html 是构建产物，里面嵌着一段 25 KB 的图片 base64，人肉编辑很容易被那串字符淹没。 两者是同一份代码：build.py 只做一件事——把模板里的占位符替换成 base64。
为什么是方形 JPEG 而不是圆形透明 PNG？ 圆形效果在 Canvas 里用 ctx.arc() + ctx.clip() 绘制时完成，视觉上完全一样， 但体积从 135 KB 降到 19 KB。PNG 的 alpha 通道在游戏里根本用不上。
纯 ASCII 文本，内容就是 bird_face.jpg 的 base64（不带 data: 前缀）。 build.py 把它注入模板中的 "__BIRD_B64__" 字面量，运行时拼成 data URI：
同一份 data URI 同时喂给 new Image()（Canvas 绘制）——所以运行时没有任何网络请求。
速度上限 + 缝隙下限保证难度收敛，不会在第 30 分变成不可能完成的任务。
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