Score
0
Best
-
Slide your finger up and down to steer a glowing dot through a winding tunnel. Every run is a new course; the tunnel keeps narrowing and the scroll keeps speeding up. Don't touch the walls.
Touch and hold the screen to start. The dot moves to your finger's height (only up and down matters) and follows it smoothly; let go and it drifts back to the middle. Touching the top or bottom wall ends the run.
The dot stays at a fixed spot near the left edge while the tunnel scrolls in from the right. Its winding shape is random, so every run is a different course and there is nothing to memorise.
Your score is the distance travelled, measured in screen heights, so it means the same on a small phone and a large one. The scroll speed rises the whole time, the wave swings wider up to a limit, and the tunnel keeps narrowing without a floor. In the end it becomes narrower than the dot, so every run finishes — even a flawless one lasts only about two minutes.
Only the height of your finger counts, not where it sits sideways. That means you can keep your thumb to the left of the dot, near the screen edge, and still steer perfectly: the dot is never hidden under your finger and the tunnel coming in from the right stays fully visible. New players tend to press right on the dot or out in the open space to the right, and both cover something you need to see.
The part of the canvas to the right of the dot — roughly 70% of its width — is all the warning you get. Early on that is a couple of seconds of tunnel; once the scroll is fast it is well under a second. Watch where the walls are heading at the right edge, not where they are beside the dot, and start moving your finger before the bend arrives. The dot catches up with your finger quickly but not instantly, so leading the curve slightly is what keeps it centred.
The centreline is a smooth blend of three waves with random lengths, so it never kinks, but it never repeats either. Rather than chasing the exact middle, take the line that needs the least vertical travel: through a hump, run close to the inner side going in and the other side coming out. Keep that habit early, while the tunnel is wide, because later the gap is too tight for it.
Letting go is a tool, not only a rest. Released, the dot glides back to the middle of the screen. When a straight, narrow stretch sits right across the middle, a short release puts you there more precisely than steering. In a curve it is the opposite — the dot drifts against the bend — so release only when the tunnel ahead runs straight through the centre.