Cross a dark room past rotating spotlight cones. Don't get caught in the beam.
Drag your finger and the blue dot chases it at a fixed speed; lift your finger and it stops. Cross from the bottom of the dark room to the green exit at the top without any spotlight cone touching you. The 60-second clock starts on your first touch.
The spotlights sit in fixed places and keep turning all the way round, each at its own speed and in its own direction (the small arc beside each lamp shows which way). Their beams reach most of the room.
If a cone touches you, you are caught: a brief red flash, then you go back to the start. Reach the exit and the level clears: your score goes up by one and a new room is lit. Either way the dot is set back at the bottom and stands still, so lift your finger and press again to move.
Each new level adds a lamp every second level, up to five, and the lamps turn a little faster, up to a top speed. The clock keeps running through catches, so every catch costs time even though it costs no points.
The room is the same size on every screen — it is only drawn larger or smaller — so a crossing takes the same time on a small phone and a large one. Goal: clear as many crossings as you can before time is up.
Watch the cones, not your dot. Beginners stare at the player trying to keep it safe; experts watch the cones' rotation and time their crossings to the gap between sweeps. The cones rotate at constant speed, so the gap between two adjacent cones also moves predictably — slot yourself into that gap and ride it across the room.
When a single cone covers your path, don't wait at the edge of its sweep. Move just before the cone reaches you, so when it arrives you're already past its leading edge. Hesitating until the cone is on top of you forces a retreat the way you came, and retreats burn the time you can't afford to waste.
Every lamp turns a full circle, and from the second level on lamps can turn in opposite directions, so no spot in the room stays dark for good. Instead, look for moments: when two neighbouring beams are both pointing away from your path, the gap between them is at its widest. Two lamps turning opposite ways open and close that gap quickly, while two turning the same way move it slowly and steadily across the room. Wait just outside the beams' reach of your next step, go as soon as the gap opens, and stop again in the next dark patch rather than trying to cross the whole room in one run.