diff --git a/clash_royale/envs/game_engine/arena.py b/clash_royale/envs/game_engine/arena.py
index 853a5b3..004f005 100644
--- a/clash_royale/envs/game_engine/arena.py
+++ b/clash_royale/envs/game_engine/arena.py
@@ -42,11 +42,11 @@ def __init__(self, width: int =8, height: int=18) -> None:
     def reset(self) -> None:
         pass
 
-    def step(self) -> None:
+    def step(self, frames: int=1) -> None:
         pass
 
     def get_entities(self) -> List[Entity]:
-        pass
+        return []
 
     def play_card(self, x: int, y: int, card: Card) -> None:
         pass
diff --git a/clash_royale/envs/game_engine/player.py b/clash_royale/envs/game_engine/player.py
index 4bb8e85..d37a9ab 100644
--- a/clash_royale/envs/game_engine/player.py
+++ b/clash_royale/envs/game_engine/player.py
@@ -49,19 +49,19 @@ def get_pseudo_legal_cards(self) -> list[Card]:
         for card in self.hand:
             if card.elixir <= self.elixir:
                 legal_cards.append(card)
+
         return legal_cards
-    
+
     def step(self, 
              elixir_rate: float,
              frames: int=1) -> None:
         """
         Called with the value of elixir_rate and frame to update the elixir of player after 'frame' number of frames
         to better customize the elixir_rate that can vary depends on game modes.
-
         """
 
         self.elixir += (elixir_rate / self.fps) * frames
-    
+
     def pop(self, card_index: int) -> None:
 
         """
diff --git a/clash_royale/envs/game_engine/struct.py b/clash_royale/envs/game_engine/struct.py
index b04d177..4707e13 100644
--- a/clash_royale/envs/game_engine/struct.py
+++ b/clash_royale/envs/game_engine/struct.py
@@ -36,15 +36,16 @@ class DefaultScheduler(GameScheduler):
     """
     Class for default 1v1 game scheduling
     """
+
     def elixir_rate(self) -> float:
-        pass
+        return 0
 
     def game_state(self) -> int:
         """
         Function to get current game state:
         ex: Game is over, double elixir, overtime, etc.
         """
-        pass
+        return 0