===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,278 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Enemy Cannonball Class
+var Cannonball = Container.expand(function () {
+	var self = Container.call(this);
+	var ball = self.attachAsset('cannonball', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = ball.width;
+	self.height = ball.height;
+	self.speed = 10;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Enemy Ship Class
+var EnemyShip = Container.expand(function () {
+	var self = Container.call(this);
+	var ship = self.attachAsset('enemyShip', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = ship.width;
+	self.height = ship.height;
+	self.speed = 2 + Math.random() * 2; // Vary speed
+	self.fireCooldown = 60 + Math.floor(Math.random() * 60); // Ticks until next shot
+	self.update = function () {
+		self.y += self.speed;
+		self.fireCooldown--;
+	};
+	return self;
+});
+// Explosion effect (visual only)
+var Explosion = Container.expand(function () {
+	var self = Container.call(this);
+	var exp = self.attachAsset('explosion', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		alpha: 0.8
+	});
+	// Animate: scale up and fade out
+	tween(self, {
+		scaleX: 1.8,
+		scaleY: 1.8,
+		alpha: 0
+	}, {
+		duration: 350,
+		easing: tween.easeOut,
+		onFinish: function onFinish() {
+			self.destroy();
+		}
+	});
+	return self;
+});
+// Player Cannonball Class
+var PlayerCannonball = Container.expand(function () {
+	var self = Container.call(this);
+	var ball = self.attachAsset('playerCannonball', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = ball.width;
+	self.height = ball.height;
+	self.speed = -16;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Player Ship Class
+var PlayerShip = Container.expand(function () {
+	var self = Container.call(this);
+	var ship = self.attachAsset('playerShip', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = ship.width;
+	self.height = ship.height;
+	// For hit flash
+	self.flash = function () {
+		tween(self, {
+			alpha: 0.3
+		}, {
+			duration: 100,
+			onFinish: function onFinish() {
+				tween(self, {
+					alpha: 1
+				}, {
+					duration: 200
+				});
+			}
+		});
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x1a3a5c // Deep blue sea
+});
+
+/**** 
+* Game Code
+****/ 
+// Explosion: red ellipse, 80x80
+// Player cannonball: gold ellipse, 60x60
+// Cannonball: black ellipse, 60x60
+// Enemy ship: dark gray box, 160x100
+// Player ship: brown box, 180x120
+// --- Globals ---
+var playerShip;
+var enemyShips = [];
+var cannonballs = [];
+var playerCannonballs = [];
+var explosions = [];
+var dragNode = null;
+var lastPlayerHit = false;
+var scoreTxt;
+var spawnTimer = 0;
+var enemySpawnInterval = 120; // ticks
+var minEnemySpawnInterval = 40;
+var difficultyTimer = 0;
+// --- Setup background color ---
+game.setBackgroundColor(0x1a3a5c);
+// --- Score UI ---
+scoreTxt = new Text2('0', {
+	size: 120,
+	fill: "#fff"
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// --- Player Ship ---
+playerShip = new PlayerShip();
+playerShip.x = 2048 / 2;
+playerShip.y = 2732 - 220;
+game.addChild(playerShip);
+// --- Touch Controls ---
+function clamp(val, min, max) {
+	if (val < min) return min;
+	if (val > max) return max;
+	return val;
+}
+function handleMove(x, y, obj) {
+	if (dragNode === playerShip) {
+		// Clamp ship inside screen
+		var halfW = playerShip.width / 2;
+		var halfH = playerShip.height / 2;
+		playerShip.x = clamp(x, halfW, 2048 - halfW);
+		playerShip.y = clamp(y, 2732 * 0.5, 2732 - halfH - 20);
+	}
+}
+game.move = handleMove;
+game.down = function (x, y, obj) {
+	// Only start drag if touch is on player ship
+	var local = playerShip.toLocal(game.toGlobal({
+		x: x,
+		y: y
+	}));
+	if (local.x >= -playerShip.width / 2 && local.x <= playerShip.width / 2 && local.y >= -playerShip.height / 2 && local.y <= playerShip.height / 2) {
+		dragNode = playerShip;
+		handleMove(x, y, obj);
+	}
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+// --- Game Update Loop ---
+game.update = function () {
+	// --- Difficulty scaling ---
+	difficultyTimer++;
+	if (difficultyTimer % 600 === 0 && enemySpawnInterval > minEnemySpawnInterval) {
+		enemySpawnInterval -= 10;
+		if (enemySpawnInterval < minEnemySpawnInterval) enemySpawnInterval = minEnemySpawnInterval;
+	}
+	// --- Spawn Enemies ---
+	spawnTimer++;
+	if (spawnTimer >= enemySpawnInterval) {
+		spawnTimer = 0;
+		var enemy = new EnemyShip();
+		// Random x, avoid edges
+		var ew = enemy.width / 2;
+		enemy.x = ew + Math.random() * (2048 - ew * 2);
+		enemy.y = -enemy.height / 2 - 10;
+		enemyShips.push(enemy);
+		game.addChild(enemy);
+	}
+	// --- Update Enemies ---
+	for (var i = enemyShips.length - 1; i >= 0; i--) {
+		var enemy = enemyShips[i];
+		enemy.update();
+		// Fire cannonball if ready and player is alive
+		if (enemy.fireCooldown <= 0 && playerShip && !lastPlayerHit) {
+			var cb = new Cannonball();
+			cb.x = enemy.x;
+			cb.y = enemy.y + enemy.height / 2 + 10;
+			cannonballs.push(cb);
+			game.addChild(cb);
+			enemy.fireCooldown = 90 + Math.floor(Math.random() * 60);
+		}
+		// Remove if off screen
+		if (enemy.y - enemy.height / 2 > 2732 + 100) {
+			enemy.destroy();
+			enemyShips.splice(i, 1);
+		}
+	}
+	// --- Update Enemy Cannonballs ---
+	for (var i = cannonballs.length - 1; i >= 0; i--) {
+		var cb = cannonballs[i];
+		cb.update();
+		// Collision with player
+		if (playerShip && cb.intersects(playerShip)) {
+			// Hit!
+			if (!lastPlayerHit) {
+				playerShip.flash();
+				LK.effects.flashScreen(0xff0000, 800);
+				lastPlayerHit = true;
+				// Show game over after short delay for effect
+				LK.setTimeout(function () {
+					LK.showGameOver();
+				}, 600);
+			}
+		}
+		// Remove if off screen
+		if (cb.y - cb.height / 2 > 2732 + 60) {
+			cb.destroy();
+			cannonballs.splice(i, 1);
+		}
+	}
+	// --- Update Player Cannonballs ---
+	for (var i = playerCannonballs.length - 1; i >= 0; i--) {
+		var pcb = playerCannonballs[i];
+		pcb.update();
+		// Remove if off screen
+		if (pcb.y + pcb.height / 2 < -60) {
+			pcb.destroy();
+			playerCannonballs.splice(i, 1);
+			continue;
+		}
+		// Check collision with enemy ships
+		for (var j = enemyShips.length - 1; j >= 0; j--) {
+			var enemy = enemyShips[j];
+			if (pcb.intersects(enemy)) {
+				// Explosion effect
+				var exp = new Explosion();
+				exp.x = enemy.x;
+				exp.y = enemy.y;
+				game.addChild(exp);
+				// Remove enemy and cannonball
+				enemy.destroy();
+				enemyShips.splice(j, 1);
+				pcb.destroy();
+				playerCannonballs.splice(i, 1);
+				// Score
+				LK.setScore(LK.getScore() + 1);
+				scoreTxt.setText(LK.getScore());
+				break;
+			}
+		}
+	}
+	// --- Fire player cannonball (auto-fire every 18 ticks) ---
+	if (playerShip && !lastPlayerHit && LK.ticks % 18 === 0) {
+		var pcb = new PlayerCannonball();
+		pcb.x = playerShip.x;
+		pcb.y = playerShip.y - playerShip.height / 2 - 10;
+		playerCannonballs.push(pcb);
+		game.addChild(pcb);
+	}
+};
\ No newline at end of file