diff --git a/engine b/engine
index 33abfd8..414630e 160000
--- a/engine
+++ b/engine
@@ -1 +1 @@
-Subproject commit 33abfd834ad5c9541796ef3f8a4999539a2f91f8
+Subproject commit 414630ecfd64ba443770ddafd15c67397073b4b8
diff --git a/game/game.py b/game/game.py
index e90597a..7ef195c 100644
--- a/game/game.py
+++ b/game/game.py
@@ -49,6 +49,7 @@ def main():
 
     print("Initializing...")
     display = create_display(b'RK Island - Drag to rotate, wheel to zoom, q to quit', 1600, 900)
+    assert display
     events = Events(display)
     mouse = Mouse(events, wheel = 60, wheel_min = 20)
     keyboard = Keyboard(events)