Game boarder and spaceship

Right now im trying to figure out why my target isnt showing up in the game
how i will i get it to move how i want it

proposal.md/nav_game.py

@@ -0,0 +1,9 @@
+from retro.game import Game
+from spaceship import Spaceship
+from targets import Targets
+
+board_size = (100, 25)
+ship = Spaceship(board_size)
+targets = Targets((board_size[0] // 2, 0))
+game = Game([ship], {"score": 0}, board_size=board_size, color="white", debug=True)
+game.play()

proposal.md/spaceship.py

@@ -0,0 +1,20 @@
+class Spaceship:
+    name = "ship"
+    character = '^'
+
+    def __init__(self, board_size):
+        board_width, board_height = board_size
+        self.position = (board_width // 2, board_height - 1)
+
+    def handle_keystroke(self, keystroke, game):
+        x, y = self.position
+        if keystroke.name in ("KEY_LEFT", "KEY_RIGHT"):
+            if keystroke.name == "KEY_LEFT": 
+                new_position = (x - 1, y)
+            else: 
+                new_position = (x + 1, y)
+            if game.on_board(new_position):
+                if game.is_empty(new_position):
+                    self.position = new_position
+                else:
+                    game.end()

proposal.md/targets.py

@@ -0,0 +1,19 @@
+class Targets:
+    character = '8'
+
+    def __init__(self, position):
+        self.position = position
+
+    def play_turn(self, game):
+        width, height = game.board_size
+        if game.turn_number % 2 == 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