diff --git a/tone-game.html b/tone-game.html
index e8798fc..d561c5f 100644
--- a/tone-game.html
+++ b/tone-game.html
@@ -20,12 +20,18 @@
         margin: 4px;
         font-family: 'Roboto', sans-serif;
         color: #414140;
+        background-color: #EFEFEE;
       }
 
       a {
         color: #414140;
       }
 
+      #cells, #complexity {
+        background-color: #EFEFEE;
+        padding-left: 0.40em;
+      }
+
       .controls {
         margin-right: 1em;
         white-space: nowrap;
@@ -91,10 +97,10 @@
       <span class="controls">
         <label for="complexity">Difficulty:</label>
         <select id="complexity">
-          <option value="0">—</option>
-          <option value="1">Beginner</option>
-          <option value="2">Intermediate</option>
-          <option value="3">Expert</option>
+          <option value="0"></option>
+          <option value="1">I</option>
+          <option value="2">II</option>
+          <option value="3">III</option>
         </select>
       </span>
     </span>