How to play

• You run the power station that keeps a city's lights on. Hold the screen, or hold Space, to add power. Let go to cut it.
• Watch the needle. If it falls below 50 Hz the city needs more power, so hold. If it climbs above 50 Hz there is too much, so let go. Your plant reacts with a short delay, so act a little early.
• The strip under the dial shows what the city will need next. Mornings and evenings need more power. Sunny middays need less, because rooftop solar helps.
• Plant trips, clouds, wind gusts and TV breaks are announced just before they hit. If the needle stays in the red for 1.5 seconds, the city blacks out.
• You score 2 points a second in the blue band and 1 in amber. Each day you survive brings more solar, more surprises and a tighter band. Everyone plays the same grid day.