If you have five spare minutes, Sky Hopper X will fill them. Everything happens on one screen with gaps that start at 26% 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.
Read Sky Hopper X as a Maraton Pack game first and a Pecut Shelf game second. The shape explains how the session will end; the group explains what it will ask of you before that.
Difficulty sits at Hard and the player count at 1. Those two numbers decide more about whether you will enjoy it than the theme does.
If you are choosing between this and something similar, start here when you have Hard energy and elsewhere when you do not. Sky Hopper X does not pretend to be more than it is.