Hold to fire the thrusters and climb, release to dive, and thread the gap in every bulkhead.
👆 Press and hold to climb ← All gamesA service drone is loose in a maintenance tube and the tube keeps throwing sealed bulkheads at it. Each slab has one slot cut through it, and your entire job is to have the drone at that height when the slab arrives. There is no left or right here — the corridor is a single vertical line of decisions, which makes the timing unusually pure. Hold the screen and the thrusters push you up against gravity; let go and you fall. The trick is that both take time to bite, so you fly the gap you will reach, not the one you can see now.
Press and hold anywhere to climb, release to dive, or hold the space bar on desktop. Passing through the green marker at the middle of a slot counts as a dead-centre pass and raises the combo multiplier; scraping through near an edge still gets you past but resets the chain. Clipping the slab ends the run. The shell of the corridor itself is safe — you can ride the roof or the floor without dying, so use them to park while you read the next gap. Past 25 points the slots stop sitting still and start sliding up and down as they approach.
Short taps beat long holds. A held thruster builds vertical speed you then have to cancel, and overshooting a slot costs more than arriving slightly low. Against a sliding gap, chase the direction it is already moving rather than aiming at where it sits. Chill mode keeps the slots wide well past the phase change if you want to learn the drift without the pace.