Fixed real-time placement of normal canvas, and brought the stop-real-time-playback-button on top of it.

app/styles/play/level.sass

@@ -19,6 +19,11 @@ $level-resize-transition-time: 0.5s
       width: 100%
       canvas
         margin: 0 auto
+      #normal-surface
+        left: 0
+        right: 0
+        margin-left: auto
+        margin-right: auto
     #control-bar-view
       width: 100%
       button, h4
@@ -44,6 +49,7 @@ $level-resize-transition-time: 0.5s
       text-align: center
     #stop-real-time-playback-button
       display: block
+      z-index: 20
 
     .level-content
       margin: 0px auto