I made sure my circles are falling continously and as the player doges the score increases.

I'm proud of making the circles fall from the top one at a time.
I was stuck on making the circle fall.

circle.py

@@ -0,0 +1,26 @@
+from random import randint
+class Circle:
+    name= "circle"
+    character = 'O'
+
+    def __init__(self, position):
+        self.position = position
+
+    def play_turn(self, game):
+        width, height = game.board_size
+        fall_speed = game.state.get("fall_speed", 1)
+        
+        x, y = self.position
+        player = game.get_agent_by_name('player')
+        new_position = (x, y + 1)
+
+        if new_position == player.position:
+                game.end()
+                return   
+        if y >= height - 1: 
+            game.state["score"] += 1
+            if game.state["fall_speed"] < 5:  
+                game.state["fall_speed"] += 1
+            self.position = (randint(0, width - 1), 0)
+        else:
+            self.position = new_position

circle_spawner.py

@@ -0,0 +1,18 @@
+from random import randint
+from circle import Circle
+
+class CircleSpawner:
+    display = False
+
+    def play_turn(self, game):
+        width, height = game.board_size
+        game.state['score'] += 1
+        if self.should_spawn_circle(game.turn_number):
+            x= randint(0, width - 1)
+            new_circle= Circle((x,0))
+            game.add_agent(new_circle)
+
+    def should_spawn_circle(self, turn_number):
+        return randint(0, 200) < turn_number
+
+    

nav_game.py

@@ -1,7 +1,16 @@
 from retro.game import Game
 from player import Player
+from circle import Circle
+
 
 board_size = (100, 25)
 player = Player(board_size)
-game = Game([player], {"score": 0}, board_size=board_size)
+circle= Circle ((board_size[0] // 2, 0))
+
+def during_turn(game):
+    pass
+     
+game = Game([player, circle], {"score": 0, "fall_speed": 1}, board_size=board_size)
+
+game.during_turn = during_turn
 game.play()

player.py

@@ -1,6 +1,6 @@
 class Player:
     name = "player"
-    character = 'O'
+    character = '^'
 
     def __init__(self, board_size):
         board_width, board_height = board_size
@@ -8,12 +8,17 @@ class Player:
 
     def handle_keystroke(self, keystroke, game):
         x, y = self.position
-        if keystroke.name in ("KEY_LEFT", "KEY_RIGHT"):
+        if keystroke.name == "KEY_LEFT":
-            if keystroke.name == "KEY_LEFT": 
+            new_position = (x - 1, y)
-                new_position = (x - 1, y)
+        elif keystroke.name == "KEY_RIGHT":
-            else: 
+            new_position = (x + 1, y)
-                new_position = (x + 1, y)
+        elif keystroke.name == "KEY_UP":
-            if game.on_board(new_position):
+            new_position = (x, y - 1)
+        elif keystroke.name == "KEY_DOWN":
+            new_position = (x, y + 1)
+        else:
+            return
+        if game.on_board(new_position):
                 if game.is_empty(new_position):
                     self.position = new_position
                 else: