diff --git a/G102-sequence/tdv_sdk.js b/G102-sequence/tdv_sdk.js
index 0f96ee3..7d1a353 100644
--- a/G102-sequence/tdv_sdk.js
+++ b/G102-sequence/tdv_sdk.js
@@ -1,7 +1,5 @@
 var tdv_sdk = {
     // --- KHO DỮ LIỆU NỘI BỘ ---
-    mode: 'live',
-    game_code: 'G120',
     list: [],
     currentQuestion: null,
     level: 0,
@@ -110,67 +108,33 @@ var tdv_sdk = {
     onLeaderboardLoaded: function (data) { console.log("SDK: Leaderboard Loaded",data); },
 
     // --- KHỞI TẠO & LOAD DỮ LIỆU ---
-    init: function (config) {
+    init: function () {
         var self = this;
-        config = config || {};
-
-        var urlParams = new URLSearchParams(window.location.search);
-
-        this.mode = config.mode || urlParams.get("mode") || "live";
-        this.game_code = config.game_code || urlParams.get("game_code") || "G120";
-
-        // Standalone → Preview
-        if (window.self === window.parent && this.mode === "live") {
-            console.warn("Standalone detected → PREVIEW mode");
-            this.mode = "preview";
+        const urlParams = new URLSearchParams(window.location.search);
+        const bgParam = urlParams.get('bg');
+        if (bgParam) {
+            this.themeSettings.current_bg = bgParam.startsWith('bg') ? bgParam : "bg" + bgParam;
         }
+        const id = urlParams.get('game_id') || this.gameID;
+        console.log("🔌 SDK: Sentence Game Initialized. Waiting for data...");
+        window.parent.postMessage({
+            type: "GAME_READY",
+            game_id: id,
+            available_bgs: this.themeSettings.bg_list,
+            selected_bg: this.themeSettings.current_bg
+        }, "*");
 
-        // Globals for Construct 2 polling
-        window.answerResult = -1;
-        window.gameState = 0; // 0: idle | 1: waiting | 2: answered
-
-        console.log("TDV SDK INIT:", this.mode, this.game_code);
-
-        if (typeof SenaGameSDK === "undefined") {
-            console.error("SenaGameSDK not found → fallback preview");
-            this._loadDataToGame(this.defaultData);
-            return;
+        if (urlParams.has('offline') || urlParams.has('demo')) {
+            console.log("🔧 SDK: Offline/Demo mode - Loading default data");
+            this.loadDefaultData();
+        } else {
+            setTimeout(function () {
+                if (!self.serverDataLoaded && self.list.length === 0) {
+                    console.warn("⚠️ SDK: No server data after 3s - Loading default data");
+                    self.loadDefaultData();
+                }
+            }, 3000);
         }
-
-        /* ===== INIT SDK ===== */
-        this.sdk = new SenaGameSDK({
-            iframePath: "./dist/sdk-iframe/index.html",
-            mode: this.mode,
-            gameCode: this.game_code,
-            debug: true,
-
-            onReady: function (sdk) {
-                sdk.pushData({
-                    items: self.defaultData.items
-                });
-            },
-
-            onDataReady: function (data) {
-                self._loadDataToGame(data);
-            },
-
-            onAnswerResult: function (result) {
-                self._handleAnswerResult(result);
-            },
-
-            onGameComplete: function (result) {
-                self._handleGameComplete(result);
-            },
-
-            onSessionStart: function (session) {
-                self.gameID = session.gameId;
-                self.userId = session.userId;
-            },
-
-            onError: function (err) {
-                console.error("SDK ERROR:", err);
-            }
-        });
     },
 
     loadDefaultData: function () {
@@ -359,7 +323,7 @@ var tdv_sdk = {
     this.shuffleArray(this.missingWords);
     console.log("🧩 Missing words:", this.missingWords);
     },
-    
+
     // ==================== TÍNH SCALE CHO TỪ ====================
     getWordScale: function () {
         var wordCount = this.currentWords.length;