Add: BackButton

src/game/lib/screen_bottom.js

@@ -18,11 +18,6 @@ class ScreenBottom {
 			.beginFill(0xffffff, 0.1)
 			.drawRect(0, this.bottomAreaPositionY, game.world.width, this.BOTTOM_BAR_HEIGHT);
 
-
-		this.printBottomLeftText(playerName);
-		this.printBottomCenterText("메뉴");
-		this.printBottomRightText(playerName);
-
 		let textStyleInfo = textStyleBasic;	//$.extend( {}, textStyleBasic);
 		textStyleInfo.font = "32px Arial";
 		textStyleInfo.align = "right";