Prevent cursor selecting entire canvas

Author: Niels-NTG

styles/main.css

@@ -5,6 +5,10 @@ body {
 
 canvas {
   vertical-align: top;
+  user-select: none;
+  -ms-user-select: none;
+  -moz-user-select: none;
+  -webkit-user-select: none;
 }
 
 #help {