A nuclear reactor control-room simulator that is haunted.
Run a pressurised water reactor through the night shift. Something else is in the building.
You are the night-shift operator. The plant is real: point kinetics, Doppler feedback, a moderator temperature coefficient, xenon poisoning, fuel burnup, thermal inertia and a reactor protection system that trips before the core is hurt. You take it from a handover, follow the grid dispatcher through the overnight trough and into the dawn peak, and you hand it over at 06:00.
Malfunctions arrive on their own. So does something else.
A thousand nights. Every night is derived from its number — ten difficulty tiers, sixteen named conditions with real mechanical weight, a scripted load profile, and a length that ends the watch itself. Night 412 is the same night whether you reach it today or after a reinstall.
Fifteen malfunctions and presences. Each has an effect on the plant, a tell you can learn, and an answer you can hold. A pump trip you ride out. A flux channel that lies, where tripping the reactor is the failure. Something that masks the annunciator, so silencing it costs you the horn entirely. Something that removes the trip setpoints keeping you alive — the only one that helps you, which is what makes it the worst.
A reason to be there. The operator before you left his logbook in the desk. Twenty-two pages. He worked out what it wants, and what it takes to make it stop, and he got to four hundred and six nights.
A licensed unit needs an operator of record with a thousand logged watches to petition for decommissioning. Resigning sends the next one.
flutter pub get
flutter run # or: flutter run -d chrome
flutter test --platform chrome
flutter build web --release --pwa-strategy=noneThere are no pub dependencies. Platform differences (storage, audio, text-to-speech) are handled by conditional imports, not packages.
python3 tool/release_audit.py # 29 store-readiness assertions
python3 tool/make_mark.py # re-render the icon masterrelease_audit.py verifies bundle identity across platforms, portrait locks,
non-white launch screens, every icon slot and pixel size, web manifest and
meta, and that no signing material is tracked. make_mark.py renders the mark
from the same geometry as the in-app LogoPainter, so the icon and the app can
never drift apart.
lib/main.dart |
the whole game — physics, nights, presences, every screen |
lib/storage_*.dart |
atomic save with a backup, per platform |
lib/audio_*.dart |
Web Audio on the web; Dart synthesis to PCM on native |
test/night_test.dart |
nights 1–1000 do not repeat |
test/presence_test.dart |
every presence bites, can be answered, and lets go |
test/playtest_test.dart |
an instrumented night flown by a scripted operator |
test/layout_test.dart |
no overflow on five phone sizes |
test/storage_test.dart |
progress survives being killed mid-write |
test/audio_test.dart |
the PCM crossing the channel is real, in range and decays |
Web is live and playable. iOS and Android are configured to ship — identity, icons, launch screens and orientation — but neither native binary has been compiled: the machine this was built on has no Android SDK and an incomplete Xcode. Release signing is deliberately untouched.
Sound works on all three. The web synthesises through Web Audio; iOS and Android render the same waveforms in Dart and hand 16-bit PCM to about forty lines of Swift and Kotlin that do nothing but play a buffer. No plugin, no package. If the channel is ever missing the engine reports that it cannot synthesise and the game falls back to haptics, so sound is an improvement and never a dependency.
All rights reserved.