diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0e2cf6000..49c7817d6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -84,7 +84,9 @@ jobs:
       - run: bun run games:clone
         env:
           GAMES_CLONE_TOKEN: ${{ secrets.GAMES_CLONE_TOKEN }}
-      - run: bun test packages apps/dev scripts
+      # Browser and physics suites cold-start Chromium/WASM; on a loaded runner the first test in a
+      # file can pass Bun's 5 s default and cascade through the file. Tests with their own timeout keep it.
+      - run: bun test --timeout 20000 packages apps/dev scripts
 
   web-build:
     runs-on: ubuntu-latest
diff --git a/changes/doctor-silent-game.md b/changes/doctor-silent-game.md
new file mode 100644
index 000000000..4d3d64e7c
--- /dev/null
+++ b/changes/doctor-silent-game.md
@@ -0,0 +1,3 @@
+### Added
+
+- `jgengine doctor` flags a silent game: one that neither declares `defineGame({ audio })` cues nor calls `ctx.game.audio.play`/`loop`. Four reference games shipped without a single sound; the fix text points at procedural `SoundDef` synth patches, which need no asset files.
diff --git a/packages/jgengine/src/create.test.ts b/packages/jgengine/src/create.test.ts
index 28e793134..3ea318c44 100644
--- a/packages/jgengine/src/create.test.ts
+++ b/packages/jgengine/src/create.test.ts
@@ -56,7 +56,8 @@ describe("writeGame", () => {
     }
 
     const failures = diagnose(dir).filter(
-      (finding) => !finding.ok && !finding.label.includes("art-direction") && !finding.label.includes("skeleton"),
+      (finding) =>
+        !finding.ok && !finding.label.includes("art-direction") && !finding.label.includes("skeleton") && !finding.label.includes("has sound"),
     );
     expect(failures).toEqual([]);
   });
diff --git a/packages/jgengine/src/doctor.test.ts b/packages/jgengine/src/doctor.test.ts
index cf2887c7b..902ba111f 100644
--- a/packages/jgengine/src/doctor.test.ts
+++ b/packages/jgengine/src/doctor.test.ts
@@ -85,6 +85,13 @@ describe("diagnose", () => {
     expect(failingLabels(dir)).toContain("Tailwind @source covers @jgengine/react and @jgengine/shell");
   });
 
+  test("flags a silent game until it declares or plays audio cues", () => {
+    const dir = scaffold();
+    expect(failingLabels(dir)).toContain("game has sound (declares audio cues)");
+    writeFileSync(join(dir, "src", "game", "sfx.ts"), 'export const cue = (ctx: { game: { audio: { play(id: string): void } } }) => ctx.game.audio.play("build");\n');
+    expect(failingLabels(dir)).not.toContain("game has sound (declares audio cues)");
+  });
+
   test("flags an aliased component folder that index.css never scans", () => {
     const dir = scaffold();
     const tsconfigPath = join(dir, "tsconfig.json");
diff --git a/packages/jgengine/src/doctor.ts b/packages/jgengine/src/doctor.ts
index 9988db60e..55238ed4e 100644
--- a/packages/jgengine/src/doctor.ts
+++ b/packages/jgengine/src/doctor.ts
@@ -254,6 +254,11 @@ export function diagnose(dir: string): Finding[] {
     if (existsSync(modelsPath)) related.push(readFileSync(modelsPath, "utf8"));
     const assetsPath = join(dir, "src", "game", "assets.ts");
     if (existsSync(assetsPath)) related.push(readFileSync(assetsPath, "utf8"));
+    findings.push({
+      ok: /\baudio\s*:/.test(configText) || /\baudio\.(play|loop)\(/.test(readSourceText(join(dir, "src"))),
+      label: "game has sound (declares audio cues)",
+      fix: 'a silent game reads unfinished — declare cues as procedural SoundDef synth patches (no asset files needed) in defineGame({ audio: { sounds } }) and call ctx.game.audio.play(id) on accepted actions: build, hit, purchase, objective, win/lose',
+    });
     const prototype = assessPrototypeLook(related);
     findings.push({
       ok: !prototype.isPrototype,