If you have five spare minutes, Night Flap will fill them. Everything happens on one screen with gaps that start at 36% of the screen and shrink with every point, and the whole thing runs straight in the browser - no downloads, no sign-ups, no fuss.
Scoring is per pipe, and the difficulty comes from variety - gap heights drift up and down the screen, so no two pipes arrive the same way. The ramp is honest: nothing suddenly teleports, the world just stops forgiving lazy taps.
Nothing here needs a tutorial or a wiki. Controls are one gesture, the goal is one sentence, and the difficulty comes from execution rather than homework. That is exactly what a browser game should be.
Flap through the pipes. One tap, one life, endless sky.
There are 21 close relatives of Night Flap in the catalogue, which is unusual here. Comparing it with Calm Wings takes about a minute and tells you more than any description.
The board is easy to read and the difficulty is Medium, so the interesting decision is not whether you can play it but when. Its rating across our own notes is 4.5 out of five.
Keep it if you play in short bursts. It rewards a second attempt far more than a first, and the second attempt costs nothing but the tap.