diff --git a/src/engine.clj b/src/engine.clj
index a1ecf8f..005cb4a 100644
--- a/src/engine.clj
+++ b/src/engine.clj
@@ -88,11 +88,11 @@
                   (rl/with-drawing!
                     (draw config updated-state)
                     (w/watch! (watch-fn config updated-state))
-                    (swap! game-state updated-state)
-                    (catch Throwable t
-                      (doseq [buf @buffered-objs]
-                        (restore! buf))
-                      (report-exception! t))))))))
+                    (reset! game-state updated-state)))
+                (catch Throwable t
+                  (doseq [buf @buffered-objs]
+                      (when buf (restore! buf)))
+                  (report-exception! t))))))
         (try
           (when unload
             (doseq [[_ tex] @texture-cache]