fix: emit sceneChange before video start to avoid hotspot flash, prevent game end for hotspot-only scenes

engine/core/Engine.ts

@@ -70,6 +70,8 @@ export class Engine {
       return
     }
 
+    this.emit('sceneChange', scene)
+
     const preloadUrls = this.sceneManager.getCandidateUrls(
       scene,
       (conds) => conds ? this.stateManager.evaluate(conds) : true
@@ -88,8 +90,6 @@ export class Engine {
     } else {
       this.videoManager.switchTo(scene.videoUrl, preloadUrls)
     }
-
-    this.emit('sceneChange', scene)
   }
 
   private checkQTE = (time: number) => {
@@ -205,6 +205,9 @@ export class Engine {
       } else {
         this.endGame()
       }
+    } else if (scene.hotspots?.length) {
+      // hotspot-only scene: wait for user to click a hotspot
+      return
     } else {
       this.endGame()
     }