diff --git a/punyverse/game.py b/punyverse/game.py
index 5b6ecd5..d23eaa3 100644
--- a/punyverse/game.py
+++ b/punyverse/game.py
@@ -127,7 +127,7 @@ class Applet(pyglet.window.Window):
             key.P: attribute_toggler(self, 'info_precise'),
             key.C: attribute_toggler(self, 'cloud'),
             key.X: attribute_toggler(self, 'atmosphere'),
-            key.ENTER: attribute_toggler(self, self.running),
+            key.ENTER: attribute_toggler(self, 'running'),
             key.INSERT: increment_tick,
             key.DELETE: decrement_tick,
             key.SPACE: self.launch_meteor,