diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..7fc0086
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,31 @@
+# Changelog
+
+All notable changes to PolyCity are documented here.
+
+## 1.0.0 — initial public release
+
+### Gameplay
+- Procedurally generated island maps with rivers, beaches and forests
+- RCI zoning with demand-driven development and a three-tier density ladder
+- City-wide power grid (coal / solar / wind, coastal wind bonus) with
+  farthest-first brownouts
+- Land value model (services, pollution, waterfront, leisure) driving upgrades
+- Service buildings: police, fire, hospital, school, park, plaza, stadium
+- Pollution-driven fires that spread unless covered by fire stations
+- Tornado disasters that flatten streets into rubble (toggleable)
+- Budget with live tax slider, itemized income/upkeep ledger
+- Happiness, RCI demand bars, milestones up to Megalopolis, quest onboarding
+- Traffic agents flowing along the road network
+- Day/night cycle with lit windows at night
+
+### Systems
+- Autosave plus 3 manual slots, JSON export/import
+- PWA: installable, offline play via service worker
+- Adaptive render resolution for weak GPUs; optional shadows
+- Touch controls: one-finger paint, two-finger orbit/zoom
+
+### Quality
+- 45-assertion engine test suite (pure Node)
+- 40-year economy soak test (11 assertions)
+- Headless browser end-to-end smoke test
+- GitHub Pages workflow + Netlify config for one-click publishing
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diff --git a/shots/08-budget.png b/shots/08-budget.png
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diff --git a/shots/scene-boot.png b/shots/scene-boot.png
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diff --git a/shots/scene-day.png b/shots/scene-day.png
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diff --git a/shots/scene-dusk.png b/shots/scene-dusk.png
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diff --git a/shots/scene-night.png b/shots/scene-night.png
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diff --git a/shots/scene-tornado.png b/shots/scene-tornado.png
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diff --git a/src/ui/ui.js b/src/ui/ui.js
index 08335bb..fce7ef0 100644
--- a/src/ui/ui.js
+++ b/src/ui/ui.js
@@ -523,8 +523,7 @@ export class UI {
         <button class="btn" id="mImport">📂 Import Save</button>
       </div>
       <h3>Save slots</h3>
-      <div id="slots"></div>
-      <h3>Settings</h3>
+      <div id="slots"></div>      <h3>Settings</h3>
       <div class="settings">
         <label><input type="checkbox" id="setSound" ${this.settings.sound ? 'checked' : ''}> Sound effects</label>
         <label><input type="checkbox" id="setShadow" ${this.settings.shadows ? 'checked' : ''}> Shadows (pretty, costs FPS)</label>
diff --git a/tests/capture.mjs b/tests/capture.mjs
index 886ea6c..2185b9c 100644
--- a/tests/capture.mjs
+++ b/tests/capture.mjs
@@ -85,6 +85,16 @@ await page.evaluate(() => { window.POLYCITY._parts.renderer.timeOfDay = 0.75; })
 await page.waitForTimeout(300);
 await snap('scene-night.png');
 
+// tornado aftermath
+await page.evaluate(() => {
+  const c = window.POLYCITY.city;
+  window.POLYCITY._parts.renderer.timeOfDay = 0.30;
+  c.notify = () => {};            // keep the frame clean
+  c.spawnTornado(); c.spawnTornado();
+});
+await page.waitForTimeout(500);
+await snap('scene-tornado.png');
+
 const stats = await page.evaluate(() => {
   const c = window.POLYCITY.city;
   return { pop: c.stats.pop, dev: [...c.grid.level].filter(v => v > 0).length, happy: c.stats.happiness };