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.

nav_game.py

@@ -2,3 +2,12 @@
 # ------------
 # By MWC Contributors
 # This class implements a simple game where a spaceship avoids asteroids.
+from retro.game import Game
+from spaceship import Spaceship
+from asteroid_spawner import AsteroidSpawner
+
+board_size = (25, 25)
+ship = Spaceship(board_size)
+spawner = AsteroidSpawner()
+game = Game([ship, spawner], {"score": 0}, board_size=board_size)
+game.play()