diff --git a/README.md b/README.md
index 1ec4b60..1ed748c 100644
--- a/README.md
+++ b/README.md
@@ -101,8 +101,10 @@ class MLPlay:
 ```json
 {
   "frame": 25,
-  "ball_x": 425,
-  "ball_y": 306,
+  "player_x": 425,
+  "player_y": 306,
+  "player_size": 90,
+  "player_vel": 16,
   "foods": [
     {
       "x": 656,
@@ -125,8 +127,10 @@ class MLPlay:
 ```
 
 - `frame`：遊戲畫面更新的編號
-- `ball_x`：主角方塊的Ｘ座標，表示方塊的左邊座標值。
-- `ball_y`：主角方塊的Ｙ座標，表示方塊的上方座標值。
+- `player_x`：主角方塊的Ｘ座標，表示方塊的`中心點`座標值，單位 pixel。
+- `player_y`：主角方塊的Ｙ座標，表示方塊的`中心點`座標值，單位 pixel。
+- `player_size`：主角方塊的大小，表示方塊的長寬，單位 pixel。
+- `player_vel`：主角方塊的速度，表示方塊每幀移動的像素，單位 pixel。
 - `foods`：食物的清單，清單內每一個物件都是一個食物的左上方座標值，也會提供此食物是什麼類型和分數多少。
   -  `type` 食物類型： `GOOD_1`, `GOOD_2`, `GOOD_3`, `BAD_1`, `BAD_2`, `BAD_3`
 - `score`：目前得到的分數
diff --git a/blockly.json b/blockly.json
index 0435f5a..d3059b8 100644
--- a/blockly.json
+++ b/blockly.json
@@ -9,8 +9,10 @@
     "SCENE_INFO": [
         ["scene_info['frame']", "# frame", "# 幀數"],
         ["scene_info['status']", "game status", "遊戲狀態"],
-        ["scene_info['ball_x']", "x coordinate of ball", "球的 x 座標"],
-        ["scene_info['ball_y']", "y coordinate of ball", "球的 y 座標"],
+        ["scene_info['player_x']", "x coordinate of player", "玩家角色的 x 座標"],
+        ["scene_info['player_y']", "y coordinate of player", "玩家角色的 y 座標"],
+        ["scene_info['player_size']", "y coordinate of player", "玩家角色的大小"],
+        ["scene_info['player_vel']", "velocity of player", "玩家角色的速度"],
         ["scene_info['score']", "score", "目前的分數"],
         ["scene_info['foods']", "list of foods positions", "點點的位置清單"],
         ["scene_info['score_to_pass']", "the score for next level", "通關分數"],
@@ -21,8 +23,7 @@
         [800, "right boundary", "右邊界"],
         [0, "top boundary", "上邊界"],
         [600, "bottom boundary", "下邊界"],
-        [30, "ball width", "球身的寬度"],
-        [30, "ball height", "球身的高度"],
+        [30, "player size", "玩家角色的初始大小"],
         [8, "food lv1 size", "等級一食物的寬高度"],
         [12, "food lv2 size", "等級二食物的高度"],
         [16, "food lv3 size", "等級三食物的高度"]
diff --git a/src/game.py b/src/game.py
index 62299ec..52aa4d9 100644
--- a/src/game.py
+++ b/src/game.py
@@ -82,7 +82,6 @@ class EasyGame(PaiaGame):
             self.ball = Ball()
             self.foods.empty()
 
-            # todo validate food count
             if not isinstance(self._good_food_count,list) or len(self._good_food_count)<3:
                 raise Exception("你的關卡檔案格式有誤，請在'good_food_count' 欄位後面填入一個長度為3的陣列，舉例： [1,2,3]")
             elif not isinstance(self._bad_food_count, list) or len(self._bad_food_count) < 3:
@@ -148,16 +147,18 @@ class EasyGame(PaiaGame):
         to_players_data = {}
         foods_data = []
         for food in self.foods:
-
+            # TODO 確認要提供中心點座標還是左上角座標。
             foods_data.append({"x": food.rect.x, "y": food.rect.y, "type": food.type, "score": food.score})
-        # TODO add velocity and ball_size
-        # TODO change ball to player
 
         data_to_1p = {
             "frame": self.frame_count,
-            "ball_x": self.ball.rect.centerx,
-            "ball_y": self.ball.rect.centery,
+            # TODO 確認要提供中心點座標還是左上角座標。
+            "player_x": self.ball.rect.centerx,
+            "player_y": self.ball.rect.centery,
+            "player_size":self.ball.rect.width,
+            "player_vel":self.ball.vel,
             "foods": foods_data,
+
             "score": self.ball.score,
             "score_to_pass":self._score_to_pass,
             "status": self.get_game_status()
diff --git a/src/game_object.py b/src/game_object.py
index c6b58b0..d24f1e6 100644
--- a/src/game_object.py
+++ b/src/game_object.py
@@ -19,7 +19,6 @@ class Ball(pygame.sprite.Sprite):
         self._score = 0
         self._vel = BALL_VEL
 
-
     def update(self, motion):
         # for motion in motions:
         if motion == "UP":
@@ -33,7 +32,6 @@ class Ball(pygame.sprite.Sprite):
             self.rect.centerx += self._vel
             # self.angle -= 5
 
-
         # self.image = pygame.transform.rotate(self.origin_image, self.angle)
         # print(self.angle)
         # center = self.rect.center
@@ -51,14 +49,17 @@ class Ball(pygame.sprite.Sprite):
             self.color
         )
 
-    def eat_food(self, food:Food):
-        self._score+=food.score
-        lv = math.ceil((self._score+1) / BALL_GROWTH_SCORE_STEP)
-        self.rect.width = min(BALL_W + lv*BALL_GROWTH_SIZE_STEP,BALL_SIZE_MAX)
-        self.rect.height = min(BALL_H + lv*BALL_GROWTH_SIZE_STEP,BALL_SIZE_MAX)
-        self._vel = min(BALL_VEL +lv*BALL_GROWTH_VEL_STEP,BALL_VEL_MAX)
+    def eat_food(self, food: Food):
+        self._score += food.score
+        lv = math.ceil((self._score + 1) / BALL_GROWTH_SCORE_STEP)
+        self.rect.width = min(BALL_W + lv * BALL_GROWTH_SIZE_STEP, BALL_SIZE_MAX)
+        self.rect.height = min(BALL_H + lv * BALL_GROWTH_SIZE_STEP, BALL_SIZE_MAX)
+        self._vel = min(BALL_VEL + lv * BALL_GROWTH_VEL_STEP, BALL_VEL_MAX)
         pass
+
     @property
     def score(self):
         return self._score
-
+    @property
+    def vel(self):
+        return self._vel
\ No newline at end of file