diff --git a/json_generator.py b/json_generator.py
index 9ae882b..09a1f4a 100644
--- a/json_generator.py
+++ b/json_generator.py
@@ -17,10 +17,10 @@ class JsonGenerator:
         self.clear_tile_dictionary()
 
         # getting grid dimensions
-        row, column = dimensions
+        num_of_rows, num_of_columns = dimensions
 
-        for i in range(row):
-            for j in range(column):
+        for i in range(num_of_rows):
+            for j in range(num_of_columns):
                 # picking random values for tiles
                 random_tile_color = random.choice(const.STRUCT_TILE_COLORS)
                 random_mine_type = random.choice(const.STRUCT_MINE_TYPES)
@@ -28,20 +28,12 @@ class JsonGenerator:
                 # randomly checking if a mine should appear
                 if random.random() < 0.75:
                     # creating a tile without a mine
-                    self.grid[str(i) + ',' + str(j)] = {
-                        "color": random_tile_color,
-                        "mine": None
-                    }
+                    self.add_tile((i, j), random_tile_color)
                 else:
                     # creating a tile with a mine
-                    self.grid[str(i) + ',' + str(j)] = {
-                        "color": random_tile_color,
-                        "mine": {
-                            "mine_type": random_mine_type
-                        }
-                    }
+                    self.add_tile_with_a_mine((i, j), random_tile_color, random_mine_type)
 
-    # adds a new tile or edits an existing one to the grid field
+    # adds a new tile or edits an existing one in the grid field
     def add_tile(self, position, color):
         # getting added/edited tile's index values
         row, column = position
@@ -51,7 +43,7 @@ class JsonGenerator:
             "mine": None
         }
 
-    # adds a new tile with a mine or edits an existing one to the grid field
+    # adds a new tile with a mine or edits an existing one in the grid field
     def add_tile_with_a_mine(self, position, color, mine_type):
         # getting added/edited tile's index values
         row, column = position
@@ -70,7 +62,7 @@ class JsonGenerator:
         # deleting a tile with given key
         self.grid.pop(str(row) + ',' + str(column))
 
-    # adds a mine to a tile in the grid field
+    # adds a mine to a tile stored in the grid field
     def add_a_mine(self, position, mine_type):
         # getting edited tile's index values
         row, column = position
@@ -93,34 +85,34 @@ class JsonGenerator:
     # clears the grid field
     def clear_tile_dictionary(self):
         self.grid.clear()
-        # resets agents starting position
+        # resetting agents starting position
         starting_row, starting_column = self.agent_starting_position
         self.grid["agent_starting_position"] = str(starting_row) + ',' + str(starting_column)
 
     # loads a grid from a file and overwrites the grid field
     def load_from_a_file(self, file_path):
-        # opens file for reading
+        # opening a file for reading
         with open(file_path, 'r') as input_file:
-            # overwrites the grid field for the grid stored in a file
+            # overwriting the grid field with the grid stored in a file
             self.grid = json.load(input_file)
 
     # saves the current grid field to a file
     def save_to_a_file(self, file_path, access_mode):
-        # opens file with a given access mode (w - write / a - append)
+        # opening a file with a given access mode (w - write / a - append)
         with open(file_path, access_mode) as output_file:
-            # saves the grid to a file
+            # saving the grid to the file
             json.dump(self.grid, output_file, indent=2, sort_keys=True)
 
     # edits a grid in a file. doesn't delete data, only overwrites and adds new entries
     def edit_a_file(self, file_path):
-        # open a file for reading
+        # opening a file for reading
         with open(file_path, "r") as input_file:
-            # loads data that was stored in the file previously
+            # loading data that was stored in the file previously
             previous_data = json.load(input_file)
-            # creates and updates a new grid using it's own grid field
+            # creating and updating a new grid using it's own grid field
             new_grid = previous_data
             new_grid.update(self.grid)
-            # opens the file for writing
+            # opening the file for writing
             with open(file_path, "w") as output_file:
-                # saves the newly created grid
+                # saving the newly created grid
                 json.dump(new_grid, output_file, indent=2, sort_keys=True)
diff --git a/project_constants.py b/project_constants.py
index daaf234..072743a 100644
--- a/project_constants.py
+++ b/project_constants.py
@@ -36,8 +36,8 @@ SCREEN = pygame.display.set_mode\
 # === STRUCTS === #
 # =============== #
 
-STRUCT_TILE_COLORS = ["blue", "green", "orange", "purple", "red", "white", "yellow"]
-STRUCT_MINE_TYPES = ['a', 'b', 'f', 'k']
+STRUCT_TILE_COLORS = ["BLUE", "GREEN", "ORANGE", "PURPLE", "RED", "WHITE", "YELLOW"]
+STRUCT_MINE_TYPES = ['A', 'B', 'F', 'K']
 
 # ============== #
 # ==== MAPS ==== #