diff -ru a/index.html b/index.html
--- a/index.html
+++ b/index.html
@@ -3,7 +3,7 @@
   <head>
     <meta charset="utf-8">
     <meta name="author" content="Amelia Clarke">
-    <title>Tower Defense</title>
+    <title>Seven Towers</title>
     <link href="style.css" rel="stylesheet">
     <script src="scripts/lib/lz-string.min.js" defer></script>
     <script src="scripts/lib/p5.min.js" defer></script>
@@ -24,7 +24,7 @@
   </head>
   <body>
     <header>
-      <h1>Tower Defense</h1>
+      <h1>Seven Towers</h1>
     </header>
 
     <main>
@@ -34,7 +34,6 @@
             <p><button class="io" onclick="importMap(prompt('Input map string:'))">Import map (M)</button></p>
             <p><button class="io" onclick="copyToClipboard(exportMap())">Export map (X)</button></p>
           </div>
-          <p>Edit maps <a href="https://rsaihe.github.io/td-editor/" target="_blank">here</a>.</p>
         </aside>
         <aside id="store">
           <h2>Store</h2>
diff -ru a/scripts/missile.js b/scripts/missile.js
--- a/scripts/missile.js
+++ b/scripts/missile.js
@@ -44,7 +44,7 @@
     }
 
     explode() {
-        if (!muteSounds) sounds.boom.play();
+        if (!muteSounds && sounds.hasOwnProperty('boom')) sounds.boom.play();
         this.kill();
         var t = this.pos;
         var inRadius = getInRange(t.x, t.y, this.blastRadius, enemies);
diff -ru a/scripts/sketch.js b/scripts/sketch.js
--- a/scripts/sketch.js
+++ b/scripts/sketch.js
@@ -373,10 +373,6 @@
 // Load all sounds
 function loadSounds() {
     sounds = {};
-    
-    // Missile explosion
-    sounds.boom = loadSound('sounds/boom.wav');
-    sounds.boom.setVolume(0.3);
 
     // Missile launch
     sounds.missile = loadSound('sounds/missile.wav');
@@ -386,18 +382,10 @@
     sounds.pop = loadSound('sounds/pop.wav');
     sounds.pop.setVolume(0.4);
 
-    // Railgun
-    sounds.railgun = loadSound('sounds/railgun.wav');
-    sounds.railgun.setVolume(0.3);
-
     // Sniper rifle shot
     sounds.sniper = loadSound('sounds/sniper.wav');
     sounds.sniper.setVolume(0.2);
 
-    // Tesla coil
-    sounds.spark = loadSound('sounds/spark.wav');
-    sounds.spark.setVolume(0.3);
-
     // Taunt enemy death
     sounds.taunt = loadSound('sounds/taunt.wav');
     sounds.taunt.setVolume(0.3);