===================================================================
--- original.js
+++ change.js
@@ -27,12 +27,12 @@
 	});
 	self.speed = 10;
 	self.update = function () {
 		// Update logic for hero
-		if (LK.isKeyDown('ArrowLeft')) {
+		if (LK.keyDown('ArrowLeft')) {
 			self.x -= self.speed;
 		}
-		if (LK.isKeyDown('ArrowRight')) {
+		if (LK.keyDown('ArrowRight')) {
 			self.x += self.speed;
 		}
 	};
 	self.shoot = function () {
@@ -124,14 +124,14 @@
 		}
 	}
 };
 // Handle touch events
-LK.on('keydown', function (key) {
+LK.on('keyDown', function (key) {
 	if (key === 'ArrowLeft' || key === 'ArrowRight') {
 		hero.update();
 	}
 });
-LK.on('keyup', function (key) {
+LK.on('keyUp', function (key) {
 	if (key === 'ArrowLeft' || key === 'ArrowRight') {
 		hero.update();
 	}
 });