protected final void onButtonClick(Button var1) {
      if(var1.id == 0) {
         this.minecraft.setCurrentScreen(new OptionsScreen(this, this.minecraft.settings));
      }

      if(var1.id == 1) {
         this.minecraft.setCurrentScreen(new GenerateLevelScreen(this));
      }

      if(this.minecraft.session != null && var1.id == 2) {
         this.minecraft.setCurrentScreen(new LoadLevelScreen(this));
      }

   }