diff --git a/proposal.md/__pycache__/spaceship.cpython-313.pyc b/proposal.md/__pycache__/spaceship.cpython-313.pyc
index 3e4bee6..1e41537 100644
Binary files a/proposal.md/__pycache__/spaceship.cpython-313.pyc and b/proposal.md/__pycache__/spaceship.cpython-313.pyc differ
diff --git a/proposal.md/__pycache__/targets.cpython-313.pyc b/proposal.md/__pycache__/targets.cpython-313.pyc
index 1d4159e..190cbfd 100644
Binary files a/proposal.md/__pycache__/targets.cpython-313.pyc and b/proposal.md/__pycache__/targets.cpython-313.pyc differ
diff --git a/proposal.md/nav_game.py b/proposal.md/nav_game.py
index 48adf27..f42aa38 100644
--- a/proposal.md/nav_game.py
+++ b/proposal.md/nav_game.py
@@ -1,9 +1,9 @@
 from retro.game import Game
 from spaceship import Spaceship
-from targets import Targets
+from targets import Asteroid
 
 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)
+targets = Asteroid((board_size[0] // 2, 0))
+game = Game([ship, targets], {"score": 0}, board_size=board_size, color="white_on_blue")
 game.play()
\ No newline at end of file
diff --git a/proposal.md/spaceship.py b/proposal.md/spaceship.py
index cf66e4a..c6149d4 100644
--- a/proposal.md/spaceship.py
+++ b/proposal.md/spaceship.py
@@ -8,11 +8,19 @@ class Spaceship:
 
     def handle_keystroke(self, keystroke, game):
         x, y = self.position
-        if keystroke.name in ("KEY_LEFT", "KEY_RIGHT"):
+        if keystroke.name in ("KEY_LEFT", "KEY_RIGHT", "KEY_UP", "KEY_DOWN"):
             if keystroke.name == "KEY_LEFT": 
                 new_position = (x - 1, y)
-            else: 
+
+            elif keystroke.name == "KEY_RIGHT": 
                 new_position = (x + 1, y)
+
+            elif keystroke.name == "KEY_UP": 
+                new_position = (x, y-1)
+
+            elif keystroke.name == "KEY_DOWN": 
+                new_position = (x, y+1)
+                
             if game.on_board(new_position):
                 if game.is_empty(new_position):
                     self.position = new_position
diff --git a/proposal.md/targets.py b/proposal.md/targets.py
index 60fffa0..add21a5 100644
--- a/proposal.md/targets.py
+++ b/proposal.md/targets.py
@@ -1,5 +1,5 @@
-class Targets:
-    character = '8'
+class Asteroid:
+    character = 'O'
 
     def __init__(self, position):
         self.position = position
@@ -16,4 +16,4 @@ class Targets:
                 if new_position == ship.position:
                     game.end()
                 else:
-                    self.position = new_position
+                    self.position = new_position
\ No newline at end of file