Draft a calming wind-down routine from a hand of habit cards, bank enough rest to cross the sleep threshold before your time budget runs out.
You're dealt a hand of habit cards, each with rest, arousal and time values. Build a routine that nets enough rest to clear the night's threshold without busting the minute budget, and without stacking too many arousing late-night habits. Then go to sleep to score the night.
Sleep Cycle is a light deck-builder that nods to good sleep hygiene. It is a game, not medical advice.
Building a routine from habit cards with rest, arousal and time values to clear a nightly threshold is sleep hygiene as a constraint problem.
Tracking arousal separately from time is the original distinction.
They are genuinely different. Time in bed is not sleep, and activities that raise arousal late — screens, caffeine, exercise — cost sleep without costing hours, which is why the advice is about the hours before bed rather than about the bedtime itself.
Sleep Cycle is a light deck-builder that nods to good sleep hygiene; it's a game, not medical advice. It's an original, free browser game built for PlayPendium.