Twist a moss-green concentric valve on a city rooftop garden to drip water into pots; release to stop. Swipe to pick a pot, tap terracotta to switch plants. Score by proximity to each plant’s target drops; three clean hits upgrade the nozzle. Overwatering wilts a pot; two wilts in a row end the run. Pot mouths shrink and targets shift as difficulty climbs.
Rooftop valve drip: twist force, score near target drops.