REEDFERRY
A paper skiff, two beats later
Guide the skiff down a portrait channel. One action each beat. The reed you plant waits, then shoves the lane.
The channel
Moss water fills the screen. Reeds stand on both banks, and the paper skiff carries a small lantern. You stay in portrait, one thumb on the four actions at the bottom.
Four actions
Pin holds the lane you are in. Plant left or plant right to queue a shove. That shove does not happen on the beat you plant it. It arrives two beats later. Hold queues nothing. It makes the very next plant leap two lanes instead of one.
The lantern
The hue changes only at a waystation. Wick, moss, and chalk are the three lanterns. A ring on the water keeps a parcel only when it matches the lantern you are carrying. Before a stretch, the tray shows which hue that stretch expects.
The chart
Six stretches run from the mouth to the last water. A cleared stretch stays painted on this iPhone. The next time you open Reedferry, the unpainted stretch is the one waiting. There is no account and nothing to buy. A network is not required.