Tips & strategy
Fly with short taps, not long holds. Steady flight comes from a quick flutter of brief presses that keeps you hovering, rather than big climbs and plunges. The pilots who last longest barely seem to move vertically at all.
Aim for the middle of the gap and stay there. Hugging either the floor or the ceiling leaves no room to recover from a mistake. Keeping to the centre of the passage gives you slack in both directions when the cave suddenly narrows.
Look ahead at the incoming terrain, not at your craft. The cave tells you what is coming a moment before it arrives, and reacting to the edge of the screen rather than your current position buys you the time to adjust smoothly.
Ease off before a downward gap, not after. Since releasing makes you fall, anticipate a dip by letting go slightly early and gliding down into it, rather than plunging late and overshooting into the floor. Gentle, early corrections beat sharp, late ones every time.