Tap to jump between two walls. Avoid the spikes. Climb as high as you can.
Your climber clings to one of the two walls. Tap the left half of the screen to jump to (or climb up) the left wall, and the right half for the right wall. Every move goes up one step.
Each step gives you +1 point and the camera follows you up. The walls have spikes pointing inward at various heights — land on a spike and the run ends, so pick the clean wall for every step.
You can't hang on forever: the bar at the top shows how long you can keep your grip. It starts at 1.5 seconds and gets shorter with every step, so read the spikes a few steps ahead and keep moving.
Look at the next two spikes, not the next one. Single-spike reads are easy and your eye will catch them automatically — what separates a long run from a short one is seeing the second spike beyond the first, because that's the one that surprises you mid-rhythm. Train yourself to scan upward a full two or three spike-distances every jump.
Don't lock into a tap rhythm. Walking up the wall in a steady tap-tap-tap rhythm feels great until the next spike isn't on the same beat — and you'll auto-jump into it. The successful climbers vary their pacing: pause a beat to wait for a spike to scroll into your safe zone, then triple-tap up a clean stretch to make up the time. Rhythm is a trap above score 30.
When the camera speed is comfortable, look for back-to-back spikes on the same wall — those are the moments you can spend an extra jump on the spike-free side. Two safe jumps on one wall is worth more than gambling a marginal jump back into spike territory. If you ever feel uncertain about a landing, hesitate and let the picture clarify; the worst losses come from forced jumps, not patient ones.