code: function update(dt) {
           // call the parent constructor
           var updated = this._super(me.Sprite, "update", [dt]); // check if the button was updated
  
  
           if (this.updated) {
             // clear the flag
             if (!this.released) {
               this.updated = false;
             }
  
             return true;
           } // else only return true/false based on the parent function
  
  
           return updated;
         }
docs: return true if the object has been clicked
  @ignore