Adding advanced attribute to blocks and categories (#273)

libs/core/game.ts

@@ -1,5 +1,5 @@
 enum Direction {
-    //% block=right    
+    //% block=right
     Right,
     //% block=left
     Left
@@ -22,6 +22,7 @@ enum LedSpriteProperty {
  * A single-LED sprite game engine
  */
 //% color=#008272 weight=32
+//% advanced=true
 namespace game {
     let _score: number = 0;
     let _life: number = 3;