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

src/game/start/start.js

@@ -12,18 +12,24 @@ var Start = {
 		this.chart = new Chart();
 
 
+		// keyboard shortcut
+		this.keyboardShortcut = new KeyboardShortcut();
+		this.keyboardShortcut.addCallback(
+			Phaser.KeyCode.ESC,	// keyCode
+			null,	// keyDownHandler
+			(function() { this.back(); }).bind(this),	// keyUpHandler
+			"start"	// callerClassName
+		);
+		this.keyboardShortcut.addCallback(
+			Phaser.KeyCode.ENTER,	// keyCode
+			null,	// keyDownHandler
+			(function() { this.startStage(); }).bind(this),	// keyUpHandler
+			"start"	// callerClassName
+		);
+
 		// top ui
 		var screenTopUI = new ScreenTopUI();
-		screenTopUI.makeBackButton( function() {
-			if(isTypingPracticeApp())
-				location.href = '../../web/client/menu_typing_practice.html';
-			else if(isTypingTestApp())
-				location.href = '../../web/client/menu_typing_test.html';
-			else
-				location.href = '../../web/client/menu_app.html';
-
-			sessionStorageManager.resetPlayingAppData();
-		});
+		screenTopUI.makeBackButton( function() { (function() { this.back(); }).bind(this) });
 		screenTopUI.makeFullScreenButton();
 
 
@@ -63,6 +69,17 @@ var Start = {
 		);
 	},
 
+	back: function() {
+		if(isTypingPracticeApp())
+			location.href = '../../web/client/menu_typing_practice.html';
+		else if(isTypingTestApp())
+			location.href = '../../web/client/menu_typing_test.html';
+		else
+			location.href = '../../web/client/menu_app.html';
+
+		sessionStorageManager.resetPlayingAppData();
+	},
+
 	loadHowToPlay: function(appID) {
 		this.dbConnectManager.requestHowToPlay(
 			sessionStorageManager.getPlayingAppID(),	// space_invaders app ID