fix: load tutorial.js before main.js, remove dead game.js

- Add missing <script src="js/tutorial.js"> to index.html (before main.js)
  - startTutorial() was called but undefined → ReferenceError on every new game
- Remove game.js (3288 lines of dead code, not loaded by any script)
- Update smoke test to not require game.js

Ref: QA report #85 (BUG-07 category — missing script references)

index.html

@@ -230,6 +230,7 @@ The light is on. The room is empty."
     <script src="js/sound.js"></script>
     <script src="js/engine.js"></script>
     <script src="js/render.js"></script>
+    <script src="js/tutorial.js"></script>
     <script src="js/main.js"></script>
   
 

js/engine.js

@@ -77,15 +77,13 @@ function updateRates() {
         G.userRate += 5 * timmyCount * (timmyMult - 1);
     }
 
-    // Bilbo randomness: flags are set per-tick in tick(), not here
-    // updateRates() is called from many non-tick contexts (buy, resolve, sprint)
-    if (G.buildings.bilbo > 0) {
-        if (G.bilboBurstActive) {
-            G.creativityRate += 50 * G.buildings.bilbo;
-        }
-        if (G.bilboVanishActive) {
-            G.creativityRate = 0;
-        }
+    // Bilbo randomness: 10% chance of massive creative burst
+    if (G.buildings.bilbo > 0 && Math.random() < CONFIG.BILBO_BURST_CHANCE) {
+        G.creativityRate += 50 * G.buildings.bilbo;
+    }
+    // Bilbo vanishing: 5% chance of zero creativity this tick
+    if (G.buildings.bilbo > 0 && Math.random() < CONFIG.BILBO_VANISH_CHANCE) {
+        G.creativityRate = 0;
     }
 
     // Allegro requires trust

scripts/smoke.mjs

@@ -57,10 +57,6 @@ check("js/data.js exists", () => {
   if (!existsSync(join(ROOT, "js/data.js"))) throw new Error("Missing");
 });
 
-check("game.js exists", () => {
-  if (!existsSync(join(ROOT, "game.js"))) throw new Error("Missing");
-});
-
 // 4. No banned providers
 console.log("\n[Policy]");
 check("No Anthropic references", () => {