!= to !==

src/models/LevelManager.ts

@@ -131,7 +131,7 @@ export class LevelManager {
     // 检查关卡配置
     this.levelMap.forEach((list, key) => {
       for (let i = 0; i < list.length; i++) {
-        if (list[i].length != 81) {
+        if (list[i].length !== 81) {
           console.error("关卡配置有误>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>", key, i)
         }
       }