diff --git a/index.html.template b/index.html.template
index 3c6abe7..7f24149 100644
--- a/index.html.template
+++ b/index.html.template
@@ -10,7 +10,7 @@
                 width: 64px;
                 image-rendering: pixelated;
             }
-            @media screen and (min-width: 1620px) {
+            @media screen and (min-width: calc(800px + calc(64px * 4))) {
                 body {
                     content: "";
                     display: table;
@@ -22,7 +22,10 @@
                 }
                 #right {
                     float: right;
-                    width: 50%;
+                    width: calc(100% - 800px - 25px);
+                    position: absolute;
+                    top: 0px;
+                    right: 0px;
                 }
             }
         </style>
diff --git a/load.js b/load.js
index afbad7b..892910c 100644
--- a/load.js
+++ b/load.js
@@ -115,6 +115,9 @@ window.requestAnimationFrame(first);
 
 addEventListener('keydown', (e) => {
     wasm_function('key_pressed')(e.keyCode);
+    if(["Space","ArrowUp","ArrowDown","ArrowLeft","ArrowRight"].indexOf(e.code) > -1) {
+        e.preventDefault();
+    }
 });
 
 addEventListener('keyup', (e) => {