diff --git a/tempest/tempest.cljs b/tempest/tempest.cljs
line changes: +1/-1
index 8721b73..4d9356d
--- a/tempest/tempest.cljs
+++ b/tempest/tempest.cljs

@@ -73,7 +73,7 @@ Publicly exported functions to embed Tempest game in HTML.
         context (.getContext canvas "2d")
         bgcanvas (dom/getElement "canv-bg")
         bgcontext (.getContext bgcanvas "2d")
-        handler (goog.events.KeyHandler. document)
+        handler (goog.events.KeyHandler. document true)
         dims {:width (.-width canvas) :height (.-height canvas)}]
 
     (draw/draw-board bgcontext dims level)

diff --git a/tempest/tempest/core.cljs b/tempest/tempest/core.cljs
line changes: +3/-1
index 2e4d96c..8ce3d73
--- a/tempest/tempest/core.cljs
+++ b/tempest/tempest/core.cljs

@@ -481,7 +481,9 @@ flipper appears to flip 'inside' the level:
    be called as the browser's key-handling callback."
   [event]
   (let [key (.-keyCode event)]
-    (swap! *key-event-queue* #(concat % [key]))))
+    (swap! *key-event-queue* #(concat % [key]))
+    (.preventDefault event)
+    (.stopPropagation event)))
 
 (defn handle-keypress
   "Returns new game state updated to reflect the results of a player's