diff --git a/public/index.html b/public/index.html
index ccccd4b..082f3cb 100644
--- a/public/index.html
+++ b/public/index.html
@@ -20,8 +20,8 @@
 </head>
 <body>
 <canvas id="display"></canvas>
-<a class="github" href="https://github.com/jakejarvis/y2k" title="GitHub Repository" target="_blank" rel="noopener">
-<svg viewBox="0 0 16 16" width="32" height="32"><path fill="#222222" d="M8 0a8 8 0 00-2.5 15.6c.4 0 .5-.2.5-.4v-1.5c-2 .4-2.5-.5-2.7-1 0-.1-.5-.9-.8-1-.3-.2-.7-.6 0-.6.6 0 1 .6 1.2.8.7 1.2 1.9 1 2.4.7 0-.5.2-.9.5-1-1.8-.3-3.7-1-3.7-4 0-.9.3-1.6.8-2.2 0-.2-.3-1 .1-2 0 0 .7-.3 2.2.7a7.4 7.4 0 014 0c1.5-1 2.2-.8 2.2-.8.5 1.1.2 2 .1 2.1.5.6.8 1.3.8 2.2 0 3-1.9 3.7-3.6 4 .3.2.5.7.5 1.4v2.2c0 .2.1.5.5.4A8 8 0 0016 8a8 8 0 00-8-8z"/></svg>
+<a class="github" href="https://github.com/jakejarvis/y2k" title="View on GitHub" target="_blank" rel="noopener">
+<svg viewBox="0 0 16 16" width="32" height="32"><path d="M8 0a8 8 0 00-2.5 15.6c.4 0 .5-.2.5-.4v-1.5c-2 .4-2.5-.5-2.7-1 0-.1-.5-.9-.8-1-.3-.2-.7-.6 0-.6.6 0 1 .6 1.2.8.7 1.2 1.9 1 2.4.7 0-.5.2-.9.5-1-1.8-.3-3.7-1-3.7-4 0-.9.3-1.6.8-2.2 0-.2-.3-1 .1-2 0 0 .7-.3 2.2.7a7.4 7.4 0 014 0c1.5-1 2.2-.8 2.2-.8.5 1.1.2 2 .1 2.1.5.6.8 1.3.8 2.2 0 3-1.9 3.7-3.6 4 .3.2.5.7.5 1.4v2.2c0 .2.1.5.5.4A8 8 0 0016 8a8 8 0 00-8-8z"/></svg>
 </a>
 <script src="app.js"></script>
 <script>
@@ -30,6 +30,8 @@ if (window.WebSocket) {
   var rfb = new RFB({ target: display, encrypt: true });
   rfb.connect("sandbox.y2k.lol", 443);
 }
+var random_tile = Math.floor(Math.random() * 20);
+document.body.style.backgroundImage = 'url("tiles/tile_' + random_tile + '.png")';
 </script>
 <script async defer src="https://scripts.simpleanalyticscdn.com/latest.js" data-skip-dnt="true"></script>
 </body>
diff --git a/public/style.css b/public/style.css
index 6dbd510..c4bdd89 100644
--- a/public/style.css
+++ b/public/style.css
@@ -3,6 +3,7 @@ body {
   padding: 0;
   width: 100%;
   height: 100%;
+  background-repeat: repeat;  /* image is set by JS onload */
 }
 canvas {
   display: block;
@@ -21,7 +22,7 @@ canvas {
   -ms-interpolation-mode: nearest-neighbor;
 }
 a.github {
-  position: absolute;
+  position: fixed;
   right: 16px;
   bottom: 16px;
   text-decoration: none;
@@ -29,4 +30,6 @@ a.github {
 a.github, a.github svg {
   width: 32px;
   height: 32px;
+  fill: #101010;
+  fill-opacity: 0.9;
 }
diff --git a/public/tiles/tile_0.png b/public/tiles/tile_0.png
new file mode 100644
index 0000000..e3de59f
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diff --git a/public/tiles/tile_1.png b/public/tiles/tile_1.png
new file mode 100644
index 0000000..1c17039
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diff --git a/public/tiles/tile_10.png b/public/tiles/tile_10.png
new file mode 100644
index 0000000..5004578
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diff --git a/public/tiles/tile_11.png b/public/tiles/tile_11.png
new file mode 100644
index 0000000..6a1f8d9
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diff --git a/public/tiles/tile_12.png b/public/tiles/tile_12.png
new file mode 100644
index 0000000..8fc1849
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diff --git a/public/tiles/tile_13.png b/public/tiles/tile_13.png
new file mode 100644
index 0000000..34d8f4c
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diff --git a/public/tiles/tile_14.png b/public/tiles/tile_14.png
new file mode 100644
index 0000000..50f9635
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diff --git a/public/tiles/tile_15.png b/public/tiles/tile_15.png
new file mode 100644
index 0000000..9891c48
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diff --git a/public/tiles/tile_16.png b/public/tiles/tile_16.png
new file mode 100644
index 0000000..3912c2f
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diff --git a/public/tiles/tile_17.png b/public/tiles/tile_17.png
new file mode 100644
index 0000000..46f0f2c
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diff --git a/public/tiles/tile_18.png b/public/tiles/tile_18.png
new file mode 100644
index 0000000..cb74d78
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diff --git a/public/tiles/tile_19.png b/public/tiles/tile_19.png
new file mode 100644
index 0000000..a75e2b1
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diff --git a/public/tiles/tile_2.png b/public/tiles/tile_2.png
new file mode 100644
index 0000000..9ccc395
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diff --git a/public/tiles/tile_3.png b/public/tiles/tile_3.png
new file mode 100644
index 0000000..17deff4
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diff --git a/public/tiles/tile_4.png b/public/tiles/tile_4.png
new file mode 100644
index 0000000..d90feb5
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diff --git a/public/tiles/tile_5.png b/public/tiles/tile_5.png
new file mode 100644
index 0000000..f76d6fd
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diff --git a/public/tiles/tile_6.png b/public/tiles/tile_6.png
new file mode 100644
index 0000000..4b3ce66
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diff --git a/public/tiles/tile_7.png b/public/tiles/tile_7.png
new file mode 100644
index 0000000..e95fb17
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diff --git a/public/tiles/tile_8.png b/public/tiles/tile_8.png
new file mode 100644
index 0000000..f4e5f9e
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diff --git a/public/tiles/tile_9.png b/public/tiles/tile_9.png
new file mode 100644
index 0000000..26e72c8
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