diff --git a/metagpt/actions/minecraft/design_curriculumn.py b/metagpt/actions/minecraft/design_curriculumn.py
index 40abb7ca4..7cbb7236e 100644
--- a/metagpt/actions/minecraft/design_curriculumn.py
+++ b/metagpt/actions/minecraft/design_curriculumn.py
@@ -24,7 +24,8 @@ class DesignTask(Action):
 
     def __init__(self, name="", context=None, llm=None):
         super().__init__(name, context, llm)
-        self.llm.model = "gpt-3.5-turbo"
+        self.llm.model = "gpt-3.5-turbo-16k"
+        self.llm.temperature = 0.5
 
     async def decompose_task(self, query, events):
         system_msgs = SystemMessage(
@@ -92,6 +93,7 @@ class DesignCurriculum(Action):
     def __init__(self, name="", context=None, llm=None):
         super().__init__(name, context, llm)
         self.llm.model = "gpt-3.5-turbo"
+        self.llm.temperature = 0.5
 
     async def generate_qa(self, events, qa_cache, qa_cache_questions_vectordb, game_memory, human_msg, system_msg):
         """
diff --git a/metagpt/actions/minecraft/generate_actions.py b/metagpt/actions/minecraft/generate_actions.py
index ca9fba391..26799216d 100644
--- a/metagpt/actions/minecraft/generate_actions.py
+++ b/metagpt/actions/minecraft/generate_actions.py
@@ -16,6 +16,7 @@ class GenerateActionCode(Action):
     def __init__(self, name="", context=None, llm=None):
         super().__init__(name, context, llm)
         self.llm.model = "gpt-4"
+        self.llm.temperature = 0.7
 
     async def generate_code(self, human_msg, system_msg=[]):
         """
diff --git a/metagpt/minecraft_team.py b/metagpt/minecraft_team.py
index ce8125b5b..568872cc6 100644
--- a/metagpt/minecraft_team.py
+++ b/metagpt/minecraft_team.py
@@ -369,7 +369,9 @@ class GameEnvironment(BaseModel, arbitrary_types_allowed=True):
                     "wait_ticks": 20,
                 }
             )
-            difficulty = "easy" if len(self.completed_tasks) > 15 else "peaceful"
+            # difficulty = "easy" if len(self.completed_tasks) > 15 else "peaceful"
+            difficulty = "peaceful"
+            
             events = self.mf_instance.step(
                 "bot.chat(`/time set ${getNextTime()}`);\n"
                 + f"bot.chat('/difficulty {difficulty}');"
diff --git a/metagpt/provider/openai_api.py b/metagpt/provider/openai_api.py
index 00e36d13a..e486fe391 100644
--- a/metagpt/provider/openai_api.py
+++ b/metagpt/provider/openai_api.py
@@ -145,6 +145,7 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
     def __init__(self, conf=CONFIG, **kwargs):
         self.__init_openai(conf)
         self.llm = openai
+        self.temperature = 0.0
         self.model = conf.openai_api_model
         self.auto_max_tokens = False
         self._cost_manager = CostManager()
@@ -187,7 +188,7 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
             "max_tokens": self.get_max_tokens(messages),
             "n": 1,
             "stop": None,
-            "temperature": 0.0,
+            "temperature": self.temperature,
             "timeout": 3,
         }
         if CONFIG.openai_api_type == "azure":
diff --git a/metagpt/roles/minecraft/action_developer.py b/metagpt/roles/minecraft/action_developer.py
index bced54d92..4243ed5b4 100644
--- a/metagpt/roles/minecraft/action_developer.py
+++ b/metagpt/roles/minecraft/action_developer.py
@@ -63,8 +63,8 @@ class ActionDeveloper(Base):
             "smeltItem",
             "killMob",
         ]
-        if not CONFIG.openai_api_model == "gpt-3.5-turbo":
-            base_skills += [
+        # if not CONFIG.openai_api_model == "gpt-3.5-turbo":
+        base_skills += [
                 "useChest",
                 "mineflayer",
             ]
diff --git a/metagpt/roles/minecraft/curriculum_agent.py b/metagpt/roles/minecraft/curriculum_agent.py
index 839494cea..1623e0aa8 100644
--- a/metagpt/roles/minecraft/curriculum_agent.py
+++ b/metagpt/roles/minecraft/curriculum_agent.py
@@ -5,6 +5,8 @@
 import random
 import json
 
+from ordered_set import OrderedSet
+
 from metagpt.logs import logger
 from metagpt.schema import Message, HumanMessage, SystemMessage
 from metagpt.roles.minecraft.minecraft_base import Minecraft as Base
@@ -84,8 +86,10 @@ class CurriculumDesigner(Base):
             if self.game_memory.completed_tasks
             else "None"
         )
+        
+        unique_failed_tasks = OrderedSet(self.game_memory.failed_tasks)
         failed_tasks = (
-            "; ".join(self.game_memory.failed_tasks)
+            "; ".join(unique_failed_tasks.items)  #self.game_memory.failed_tasks
             if self.game_memory.failed_tasks
             else "None"
         )