/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000011
});

/**** 
* Game Code
****/ 
var player = game.addChild(new PlayerShip());
player.x = 1024;
player.y = 2600;
tween(player, {
	scaleX: 1.2,
	scaleY: 1.2
}, {
	duration: 800,
	easing: tween.easeInOut,
	onFinish: function onFinish() {
		tween(player, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 800,
			easing: tween.easeInOut
		});
	}
});
var playerBullets = [];
var enemies = [];
var bulletTimer = 0;
var enemySpawnTimer = 0;
var enemySpawnRate = 120;
var dragNode = null;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 50;
function handleMove(x, y, obj) {
	if (dragNode) {
		var targetX = x;
		if (targetX < 60) targetX = 60;
		if (targetX > 1988) targetX = 1988;
		tween.stop(dragNode, {
			x: true
		});
		tween(dragNode, {
			x: targetX
		}, {
			duration: 150,
			easing: tween.easeOut
		});
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	dragNode = player;
	handleMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragNode = null;
};
game.update = function () {
	bulletTimer++;
	enemySpawnTimer++;
	// Spawn player bullets
	if (bulletTimer >= 15) {
		var newBullet = new PlayerBullet();
		newBullet.x = player.x;
		newBullet.y = player.y - 40;
		newBullet.lastY = newBullet.y;
		playerBullets.push(newBullet);
		game.addChild(newBullet);
		LK.getSound('shoot').play();
		bulletTimer = 0;
	}
	// Spawn enemies
	if (enemySpawnTimer >= enemySpawnRate) {
		var newEnemy = new EnemyShip();
		newEnemy.x = Math.random() * 1800 + 124;
		newEnemy.y = -30;
		newEnemy.lastY = newEnemy.y;
		newEnemy.lastIntersectingPlayer = false;
		newEnemy.scaleX = 0.5;
		newEnemy.scaleY = 0.5;
		newEnemy.alpha = 0.7;
		tween(newEnemy, {
			scaleX: 1,
			scaleY: 1,
			alpha: 1
		}, {
			duration: 400,
			easing: tween.easeOut
		});
		enemies.push(newEnemy);
		game.addChild(newEnemy);
		enemySpawnTimer = 0;
		if (enemySpawnRate > 30) {
			enemySpawnRate -= 1;
		}
	}
	// Update and check player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Remove bullets that go off screen
		if (bullet.lastY >= -10 && bullet.y < -10) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check bullet-enemy collisions
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				LK.setScore(LK.getScore() + 10);
				scoreTxt.setText(LK.getScore());
				LK.getSound('explosion').play();
				LK.effects.flashObject(enemy, 0xffffff, 200);
				tween(enemy, {
					scaleX: 2,
					scaleY: 2,
					alpha: 0
				}, {
					duration: 300,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						enemy.destroy();
					}
				});
				bullet.destroy();
				playerBullets.splice(i, 1);
				enemies.splice(j, 1);
				hitEnemy = true;
				break;
			}
		}
		if (hitEnemy) continue;
		bullet.lastY = bullet.y;
	}
	// Update and check enemies
	for (var k = enemies.length - 1; k >= 0; k--) {
		var enemy = enemies[k];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		if (enemy.lastIntersectingPlayer === undefined) enemy.lastIntersectingPlayer = false;
		// Remove enemies that go off screen
		if (enemy.lastY <= 2800 && enemy.y > 2800) {
			enemy.destroy();
			enemies.splice(k, 1);
			continue;
		}
		// Check enemy-player collision
		var currentIntersecting = enemy.intersects(player);
		if (!enemy.lastIntersectingPlayer && currentIntersecting) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
		enemy.lastY = enemy.y;
		enemy.lastIntersectingPlayer = currentIntersecting;
	}
};

===================================================================
--- original.js
+++ change.js
@@ -51,8 +51,24 @@
 ****/ 
 var player = game.addChild(new PlayerShip());
 player.x = 1024;
 player.y = 2600;
+tween(player, {
+	scaleX: 1.2,
+	scaleY: 1.2
+}, {
+	duration: 800,
+	easing: tween.easeInOut,
+	onFinish: function onFinish() {
+		tween(player, {
+			scaleX: 1,
+			scaleY: 1
+		}, {
+			duration: 800,
+			easing: tween.easeInOut
+		});
+	}
+});
 var playerBullets = [];
 var enemies = [];
 var bulletTimer = 0;
 var enemySpawnTimer = 0;
@@ -66,11 +82,20 @@
 LK.gui.top.addChild(scoreTxt);
 scoreTxt.y = 50;
 function handleMove(x, y, obj) {
 	if (dragNode) {
-		dragNode.x = x;
-		if (dragNode.x < 60) dragNode.x = 60;
-		if (dragNode.x > 1988) dragNode.x = 1988;
+		var targetX = x;
+		if (targetX < 60) targetX = 60;
+		if (targetX > 1988) targetX = 1988;
+		tween.stop(dragNode, {
+			x: true
+		});
+		tween(dragNode, {
+			x: targetX
+		}, {
+			duration: 150,
+			easing: tween.easeOut
+		});
 	}
 }
 game.move = handleMove;
 game.down = function (x, y, obj) {
@@ -100,8 +125,19 @@
 		newEnemy.x = Math.random() * 1800 + 124;
 		newEnemy.y = -30;
 		newEnemy.lastY = newEnemy.y;
 		newEnemy.lastIntersectingPlayer = false;
+		newEnemy.scaleX = 0.5;
+		newEnemy.scaleY = 0.5;
+		newEnemy.alpha = 0.7;
+		tween(newEnemy, {
+			scaleX: 1,
+			scaleY: 1,
+			alpha: 1
+		}, {
+			duration: 400,
+			easing: tween.easeOut
+		});
 		enemies.push(newEnemy);
 		game.addChild(newEnemy);
 		enemySpawnTimer = 0;
 		if (enemySpawnRate > 30) {
@@ -126,11 +162,21 @@
 				LK.setScore(LK.getScore() + 10);
 				scoreTxt.setText(LK.getScore());
 				LK.getSound('explosion').play();
 				LK.effects.flashObject(enemy, 0xffffff, 200);
+				tween(enemy, {
+					scaleX: 2,
+					scaleY: 2,
+					alpha: 0
+				}, {
+					duration: 300,
+					easing: tween.easeOut,
+					onFinish: function onFinish() {
+						enemy.destroy();
+					}
+				});
 				bullet.destroy();
 				playerBullets.splice(i, 1);
-				enemy.destroy();
 				enemies.splice(j, 1);
 				hitEnemy = true;
 				break;
 			}