refactor folder structure

game_config.json

@@ -1,12 +1,15 @@
 {
   "game_name": "easy_game",
-  "version": "1.2.1",
+  "version": "2.0.1-beta",
   "url": "https://github.com/PAIA-Playful-AI-Arena/easy_game",
   "description": "這是一個吃東西小遊戲，除了讓你熟習所有基本操作，也是 PAIA 的遊戲教學範例",
   "logo": [
     "./asset/logo.svg",
     "https://raw.githubusercontent.com/PAIA-Playful-AI-Arena/Paia-Desktop/master/media/easygame.svg"
   ],
+  "player_num": {
+    "min": 1,"max": 1
+  },
   "game_params": [
     {
       "name": "time_to_play",