Add: ESC key back(), Enter key start/restart to all features

src/game/typing/practice/game.js

@@ -17,10 +17,7 @@ var TypingPractice = {
 
 		// top ui
 		var screenTopUI = new ScreenTopUI();
-		screenTopUI.makeBackButton( function() {
-			sessionStorageManager.resetPlayingAppData();
-			location.href = '../../web/client/menu_typing_practice.html';
-		});
+		screenTopUI.makeBackButton( (function() { this.back(); }).bind(this) );
 		screenTopUI.makeFullScreenButton();
 
 
@@ -86,8 +83,14 @@ var TypingPractice = {
 			this.keyboard = new Keyboard(this.keyMapper, Keyboard.KOREAN, Keyboard.NO_OFFSET_POS_Y);
 		else
 			this.keyboard = new Keyboard(this.keyMapper, Keyboard.ENGLISH, Keyboard.NO_OFFSET_POS_Y);
+		this.keyboard.addCallback(
+			Phaser.KeyCode.ESC,	// keyCode
+			null,	// keyDownHandler
+			(function() { this.back(); }).bind(this),	// keyUpHandler
+			"typing_practice"	// callerClassName
+		);
 
-		game.input.keyboard.processKeyPress = (function() {
+		game.input.keyboard.processKeyPress = (function(event) {
 			if(self.isOnStage === false)
 				return;
 
@@ -112,6 +115,12 @@ var TypingPractice = {
 		// this.countDown();
 	},
 
+
+	back: function() {
+		sessionStorageManager.resetPlayingAppData();
+		location.href = '../../web/client/menu_typing_practice.html';
+	},
+
 	startGame: function() {
 		this.isOnStage = true;
 		this.stageTimer.start();
@@ -353,7 +362,7 @@ var TypingPractice = {
 		return true;
 	},
 
-	checkTypingContents: function(evnet) {
+	checkTypingContents: function(event) {
 		var inputContent = event.key;
 		var typingContent = this.typingRandomContents[this.typingIndex];