One tap,
and then the pipes.
A bird that cannot fly, doing it anyway. No timers pushing you to come back, no chest to open, no reason to play it except that you wanted to.
One tap, and gravity
Tap to flap, and that is the whole control scheme. Every pipe is a point, and every five points the world speeds up, the gaps narrow and the pipes crowd closer together — until level eleven, where it is as hard as it will ever get and the rest is up to you.
Seven skies
Night, day and dusk, then a screen of falling code, a ringed planet in deep space, a frozen world where snow comes down and the bird visibly shivers, and a lava flow with embers riding the updraught.
Eleven achievements
Tuned so an ordinary run earns none of them. Four are judged inside a single run — a squeeze past a gap with under ten pixels to spare, a pass dead through the middle, ten pipes without scraping the ceiling, ninety seconds aloft.
Seven languages
English, Español, Français, Italiano, Türkçe, Русский, 中文 — chosen by your phone, changed whenever you like.
Nothing to buy, nothing to watch
No ads, no purchases, no accounts, and nothing leaves your phone. Not your scores, not your settings, not anything about you.
The game has no network code in it at all — there is nothing to send and nowhere to send it. Here is exactly what that means.