diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
new file mode 100644
index 0000000..1d67199
--- /dev/null
+++ b/.gitea/workflows/ci.yml
@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - run: npm ci
+
+      - name: Syntax and structure checks
+        run: npm test
+
+      - name: Build
+        run: npm run build
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1ceba27
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+node_modules/
+.claude/
+dist/
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f32b707
--- /dev/null
+++ b/README.md
@@ -0,0 +1,48 @@
+# Wings of the 90s - Flight Simulator
+
+A period-accurate 3D flight simulator inspired by early 90s Amiga/DOS games like *Comanche*, *F-15 Strike Eagle*, and *After Burner*. Runs in any modern browser.
+
+## Features
+
+- **Authentic retro aesthetic** — 320×200 VGA Mode X resolution, CRT post-processing (barrel distortion, scanlines, color quantization, chromatic aberration, vignette), EGA 16-color palette
+- **Loading screen** with progress bar and cycling messages
+- **Main menu** with keyboard navigation
+- **Procedural terrain** — 2000m heightmap with vertex-colored hills, water plane, low-poly clouds
+- **Airport** — Runway with markings, taxiway, control tower, hangars, fuel truck, windsock
+- **Low-poly Cessna-style aircraft** with animated propeller and retractable landing gear
+- **6-DOF flight physics** — Thrust, drag, lift, gravity, ground friction, auto-leveling
+- **Flight HUD** — Artificial horizon, airspeed, altimeter, heading tape, vertical speed indicator, throttle bar
+- **Sound** — Engine drone tied to throttle, menu beeps
+
+## Controls
+
+| Key | Action |
+|---|---|
+| `W` / `S` | Throttle up / down |
+| `↑` / `↓` | Pitch |
+| `←` / `→` | Roll |
+| `Q` / `E` | Yaw (rudder) |
+| `C` | Toggle cockpit / chase camera |
+| `Esc` | Pause / resume |
+
+## Getting Started
+
+```bash
+npm install
+npm run dev
+```
+
+Open `http://localhost:5173` in your browser.
+
+## Build
+
+```bash
+npm run build
+```
+
+## Tech Stack
+
+- Three.js r160 for 3D rendering
+- Vite for dev server and builds
+- Vanilla JS, no frameworks
+- Web Audio API for sound
diff --git a/package.json b/package.json
index e2b9d43..247caf1 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
   },
   "scripts": {
     "dev": "vite",
-    "build": "vite build"
+    "build": "vite build",
+    "test": "node scripts/check-syntax.js"
   }
 }
diff --git a/scripts/check-syntax.js b/scripts/check-syntax.js
new file mode 100644
index 0000000..c27620e
--- /dev/null
+++ b/scripts/check-syntax.js
@@ -0,0 +1,65 @@
+import { readFileSync, readdirSync } from 'fs';
+import { join, dirname } from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const root = join(__dirname, '..');
+const jsDir = join(root, 'js');
+
+const files = readdirSync(jsDir).filter(f => f.endsWith('.js'));
+
+let errors = 0;
+for (const file of files) {
+  const path = join(jsDir, file);
+  const source = readFileSync(path, 'utf-8');
+  // Basic sanity: file is non-empty and has balanced braces
+  if (source.length < 10) {
+    console.log(`  FAIL  ${file}: too small`);
+    errors++;
+    continue;
+  }
+  const openBraces = (source.match(/{/g) || []).length;
+  const closeBraces = (source.match(/}/g) || []).length;
+  if (openBraces !== closeBraces) {
+    console.log(`  FAIL  ${file}: unbalanced braces (${openBraces} open, ${closeBraces} close)`);
+    errors++;
+    continue;
+  }
+  const openParens = (source.match(/\(/g) || []).length;
+  const closeParens = (source.match(/\)/g) || []).length;
+  if (openParens !== closeParens) {
+    console.log(`  FAIL  ${file}: unbalanced parentheses`);
+    errors++;
+    continue;
+  }
+  console.log(`  PASS  ${file}`);
+}
+
+const html = readFileSync(join(root, 'index.html'), 'utf-8');
+if (html.includes('<canvas') && html.includes('<script')) {
+  console.log('  PASS  index.html');
+} else {
+  console.log('  FAIL  index.html missing required elements');
+  errors++;
+}
+
+const css = readFileSync(join(root, 'css', 'style.css'), 'utf-8');
+if (css.includes('#game-canvas') && css.includes('#loading-screen')) {
+  console.log('  PASS  css/style.css');
+} else {
+  console.log('  FAIL  css/style.css missing required selectors');
+  errors++;
+}
+
+const required = ['main', 'flight-model', 'terrain', 'airport', 'aircraft', 'hud', 'ui', 'retro', 'sound'];
+for (const mod of required) {
+  const source = readFileSync(join(jsDir, `${mod}.js`), 'utf-8');
+  if (source.includes('export class') || source.includes('export default')) {
+    console.log(`  PASS  js/${mod}.js exports correctly`);
+  } else {
+    console.log(`  WARN  js/${mod}.js missing export`);
+  }
+}
+
+console.log(`\n${errors === 0 ? 'All checks passed!' : `${errors} error(s) found.`}`);
+if (errors > 0) process.exit(1);