This code is very different from Unit 1. Unit 1 was very top to bottom. This is more object driven. Instead of one loop or code there are agents that act to put everything together as a focus of what agent should be doing for the game to become a game such as the spaceship, asteroid, asteroid spawner are all used to generate the game. This code seems so real and more day to day life in my opinion.

asteroid.py

@@ -2,3 +2,23 @@
 # ------------
 # By MWC Contributors
 # This module defines an asteroid agent class.
+class Asteroid:
+    character = 'O'
+
+    def __init__(self, position):
+        self.position = position
+
+    def play_turn(self, game):
+        width, height = game.board_size
+
+        if game.turn_number % 1 == 0: 
+            x, y = self.position
+            if y == height - 1: 
+                game.remove_agent(self)
+            else:
+                ship = game.get_agent_by_name('ship')
+                new_position = (x, y + 1)
+                if new_position == ship.position:
+                    game.end()
+                else:
+                    self.position = new_position