Fixed #2564: level info underlapping too-large game control buttons on tiny screens.

app/styles/play/campaign-view.sass

@@ -312,14 +312,19 @@ $gameControlMargin: 30px
     position: absolute
     right: 1%
     bottom: 1%
-    z-index: 3
+    z-index: 2
 
     .btn
       &:not(:first-child)
         margin-left: $gameControlMargin
+        @media only screen and (max-height: 650px)
+          margin-left: 0
       width: $gameControlSize
       height: $gameControlSize
 
+      @media only screen and (max-height: 650px)
+        @include scale(0.67)
+
       background: url(/images/pages/play/menu_icons.png) no-repeat
 
       position: relative