diff --git a/src/game/game.py b/src/game/game.py
index 6ba22bd..f1d9e1c 100644
--- a/src/game/game.py
+++ b/src/game/game.py
@@ -30,6 +30,13 @@ def play() -> None:
 
 
 class Game2048:
+    """
+    Initialize the 2048 game board.
+
+    Parameters:
+    - size (int): Size of the board (default is 4)
+    """
+
     def __init__(self, size: int = 4):
         self.size = size
         self.board = np.zeros((size, size), dtype=int)
@@ -39,13 +46,25 @@ class Game2048:
         self.add_random_tile()
 
     def add_random_tile(self) -> None:
-        """Add a random tile to the board."""
+        """
+        Add a random tile (either 2 or 4) to a random empty cell on the board.
+        The probability of getting a 2 or 4 is determined by the Config.tile.probability weights.
+        """
         tile_value = random.choices([2, 4], weights=Config.tile.probability)[0]
         tile_row_options, tile_col_options = np.nonzero(np.logical_not(self.board))
         tile_loc = np.random.randint(0, len(tile_row_options))
         self.board[tile_row_options[tile_loc], tile_col_options[tile_loc]] = tile_value
 
     def move(self, direction: Direction) -> tuple[bool, int]:
+        """
+        Move the tiles in the specified direction and update the score.
+
+        Parameters:
+        - direction (Direction): The direction to move the tiles.
+
+        Returns:
+        tuple[bool, int]: A tuple indicating whether the move was successful and the updated score.
+        """
         match direction:
             case Direction.LEFT:
                 return self.move_left()
@@ -57,6 +76,12 @@ class Game2048:
                 return self.move_down()
 
     def move_right(self) -> tuple[bool, int]:
+        """
+        Move tiles to the right and update the score.
+
+        Returns:
+        tuple[bool, int]: A tuple indicating whether the move was successful and the updated score.
+        """
         self.board, moved = self._move_and_merge(self.board)
 
         if moved:
@@ -64,6 +89,12 @@ class Game2048:
         return moved, self.score
 
     def move_left(self) -> tuple[bool, int]:
+        """
+        Move tiles to the left and update the score.
+
+        Returns:
+        tuple[bool, int]: A tuple indicating whether the move was successful and the updated score.
+        """
         board = np.rot90(self.board, 2)
         board, moved = self._move_and_merge(board)
         self.board = np.rot90(board, 2)
@@ -73,6 +104,12 @@ class Game2048:
         return moved, self.score
 
     def move_up(self) -> tuple[bool, int]:
+        """
+        Move tiles upwards and update the score.
+
+        Returns:
+        tuple[bool, int]: A tuple indicating whether the move was successful and the updated score.
+        """
         board = np.rot90(self.board, -1)
         board, moved = self._move_and_merge(board)
         self.board = np.rot90(board, 1)
@@ -82,6 +119,12 @@ class Game2048:
         return moved, self.score
 
     def move_down(self) -> tuple[bool, int]:
+        """
+        Move tiles downwards and update the score.
+
+        Returns:
+        tuple[bool, int]: A tuple indicating whether the move was successful and the updated score.
+        """
         board = np.rot90(self.board, 1)
         board, moved = self._move_and_merge(board)
         self.board = np.rot90(board, -1)
@@ -91,12 +134,30 @@ class Game2048:
         return moved, self.score
 
     def _move_and_merge(self, board: np.ndarray) -> tuple[np.ndarray, bool]:
+        """
+        Move and merge tiles in the specified direction.
+
+        Parameters:
+        - board (np.ndarray): The game board.
+
+        Returns:
+        tuple[np.ndarray, bool]: A tuple containing the updated board and whether any tiles were moved or merged.
+        """
         board, has_pushed = self._push_board_right(board)
         board, has_merged = self._merge(board)
         board, _ = self._push_board_right(board)
         return board, has_pushed or has_merged
 
     def _merge(self, board: np.ndarray) -> tuple[np.ndarray, bool]:
+        """
+        Merge adjacent tiles with the same value.
+
+        Parameters:
+        - board (np.ndarray): The game board.
+
+        Returns:
+        tuple[np.ndarray, bool]: A tuple containing the updated board and whether any tiles were merged.
+        """
         done = False
         for row in range(self.size):
             for col in range(self.size - 1, 0, -1):
@@ -109,6 +170,9 @@ class Game2048:
         return board, done
 
     def display(self) -> None:
+        """
+        Display the current state of the game board and the score.
+        """
         print(f"Score: {self.score}")
         for row in self.board:
             for val in row:
@@ -116,6 +180,15 @@ class Game2048:
             print()
 
     def _push_board_right(self, board: np.ndarray) -> tuple[np.ndarray, bool]:
+        """
+        Push tiles to the right, removing empty spaces.
+
+        Parameters:
+        - board (np.ndarray): The game board.
+
+        Returns:
+        tuple[np.ndarray, bool]: A tuple containing the updated board and whether any tiles were pushed.
+        """
         new_board = np.zeros((self.size, self.size), dtype=int)
         done = False
         for row in range(self.size):