diff --git a/game_config.json b/game_config.json
index c142412..0153002 100644
--- a/game_config.json
+++ b/game_config.json
@@ -8,7 +8,8 @@
     "https://raw.githubusercontent.com/PAIA-Playful-AI-Arena/Paia-Desktop/master/media/easygame.svg"
   ],
   "user_num": {
-    "min": 1,"max": 1
+    "min": 1,
+    "max": 1
   },
   "game_params": [
     {
@@ -24,19 +25,42 @@
       "name": "green_food_count",
       "verbose": "綠色食物數量",
       "type": "int",
-      "choices":[ 5 ,10 ,15,20,25,30,35,40,45,50],
-      "help": "set the total number of points",
-      "default": 10
-    }, {
-      "name": "black_food_count",
-      "verbose": "黑色食物數量",
-      "type": "int",
-      "choices":[ 5 ,10 ,15,20,25,30,35,40,45,50],
+      "choices": [
+        5,
+        10,
+        15,
+        20,
+        25,
+        30,
+        35,
+        40,
+        45,
+        50
+      ],
       "help": "set the total number of points",
       "default": 10
     },
     {
-      "name": "score_to_win",
+      "name": "black_food_count",
+      "verbose": "黑色食物數量",
+      "type": "int",
+      "choices": [
+        5,
+        10,
+        15,
+        20,
+        25,
+        30,
+        35,
+        40,
+        45,
+        50
+      ],
+      "help": "set the total number of points",
+      "default": 10
+    },
+    {
+      "name": "score_to_pass",
       "verbose": "通關分數",
       "type": "int",
       "min": 1,
@@ -48,9 +72,17 @@
       "name": "playground_size",
       "verbose": "場地尺寸",
       "type": "list",
-
-      "default": "500,400",
+      "default": "400,400",
       "help": "set the size of playground "
+    },
+    {
+      "name": "level",
+      "verbose": "內建關卡編號",
+      "type": "int",
+      "min": -1,
+      "max": 5,
+      "default": "-1",
+      "help": "選定內建關卡，請注意，使用此設定將會覆蓋掉其他設定，預設為 -1 不選擇任何關卡。"
     }
   ]
 }
\ No newline at end of file
diff --git a/levels/001.json b/levels/001.json
index 537ddf2..92f13d3 100644
--- a/levels/001.json
+++ b/levels/001.json
@@ -1,27 +1,10 @@
 {
-  "frame_limit": 1200,
-  "screen_size": [
+  "time_to_play": 1200,
+  "playground_size": [
     100,
-    100
+    200
   ],
   "score_to_pass": 20,
-  "mebo_init_lv": 1,
-  "green_food_counts": [
-    8,
-    5,
-    2,
-    1
-  ],
-  "red_food_counts": [
-    8,
-    5,
-    2,
-    1
-  ],
-  "black_food_counts": [
-    8,
-    5,
-    2,
-    1
-  ]
+  "green_food_count": 3,
+  "black_food_count": 0
 }
\ No newline at end of file
diff --git a/levels/template.json b/levels/template.json
index 537ddf2..8e70077 100644
--- a/levels/template.json
+++ b/levels/template.json
@@ -1,27 +1,10 @@
 {
-  "frame_limit": 1200,
-  "screen_size": [
-    100,
-    100
+  "time_to_play": 1200,
+  "playground_size": [
+    500,
+    200
   ],
   "score_to_pass": 20,
-  "mebo_init_lv": 1,
-  "green_food_counts": [
-    8,
-    5,
-    2,
-    1
-  ],
-  "red_food_counts": [
-    8,
-    5,
-    2,
-    1
-  ],
-  "black_food_counts": [
-    8,
-    5,
-    2,
-    1
-  ]
+  "green_food_count": 3,
+  "black_food_count": 1
 }
\ No newline at end of file
diff --git a/src/game.py b/src/game.py
index 2ac9dbe..5ecb927 100644
--- a/src/game.py
+++ b/src/game.py
@@ -1,4 +1,6 @@
 import copy
+import json
+import os.path
 from os import path
 
 import pygame
@@ -25,26 +27,44 @@ class EasyGame(PaiaGame):
     """
 
     def __init__(
-            self, time_to_play, score_to_win, green_food_count, black_food_count,
-            playground_size:list,
+            self, time_to_play, score_to_pass, green_food_count, black_food_count,
+            playground_size: list,
+            level: int = -1,
+            # level_file,
             *args, **kwargs):
         super().__init__(user_num=1)
-        self.playground_w = int(playground_size[0])
-        self.playground_h = int(playground_size[1])
 
         self.game_result_state = GameResultState.FAIL
         self.scene = Scene(width=WIDTH, height=HEIGHT, color=BG_COLOR, bias_x=0, bias_y=0)
-        self.playground = pygame.Rect(
-            0, 0,
-            self.playground_w,
-            self.playground_h
-        )
-        self.playground.center = (WIDTH / 2, HEIGHT / 2)
-        self.green_food_count = green_food_count
-        self.black_food_count = black_food_count
-        self.score_to_win = score_to_win
-        self.frame_limit = time_to_play
+        if level != -1:
+            with open(os.path.join(LEVEL_PATH, f"{level:03d}.json")) as f:
+                game_params = json.load(f)
+            self.playground_w = int(game_params["playground_size"][0])
+            self.playground_h = int(game_params["playground_size"][1])
+            self.playground = pygame.Rect(
+                0, 0,
+                self.playground_w,
+                self.playground_h
+            )
+            self.green_food_count = int(game_params["green_food_count"])
+            self.black_food_count = int(game_params["black_food_count"])
+            self.score_to_win = int(game_params["score_to_pass"])
+            self.frame_limit = int(game_params["time_to_play"])
+            pass
+        else:
+            self.playground_w = int(playground_size[0])
+            self.playground_h = int(playground_size[1])
+            self.playground = pygame.Rect(
+                0, 0,
+                self.playground_w,
+                self.playground_h
+            )
+            self.green_food_count = green_food_count
+            self.black_food_count = black_food_count
+            self.score_to_win = score_to_pass
+            self.frame_limit = time_to_play
 
+        self.playground.center = (WIDTH / 2, HEIGHT / 2)
         self.foods = pygame.sprite.Group()
         self.init_game()
 
@@ -187,7 +207,7 @@ class EasyGame(PaiaGame):
                         "player": get_ai_name(0),
                         "rank": 1,
                         "score": self.score,
-                        "passed":self.score>self.score_to_win
+                        "passed": self.score > self.score_to_win
                     }
                 ]