===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,343 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Crosshair class
+var Crosshair = Container.expand(function () {
+	var self = Container.call(this);
+	var cross = self.attachAsset('crosshair', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	cross.alpha = 0.5;
+	// Muzzle flash
+	var muzzle = self.attachAsset('muzzle', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		x: 0,
+		y: 0
+	});
+	muzzle.visible = false;
+	// Show muzzle flash
+	self.flash = function () {
+		muzzle.visible = true;
+		muzzle.alpha = 1;
+		tween(muzzle, {
+			alpha: 0
+		}, {
+			duration: 120,
+			easing: tween.linear,
+			onFinish: function onFinish() {
+				muzzle.visible = false;
+			}
+		});
+	};
+	return self;
+});
+// Enemy class
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemySprite = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Speed and direction
+	self.speed = 6;
+	self.dx = 0;
+	self.dy = 0;
+	self.radius = enemySprite.width * 0.5;
+	// For hit detection
+	self.isAlive = true;
+	// For wave/difficulty
+	self.wave = 1;
+	// Set movement vector towards center
+	self.setTarget = function (tx, ty) {
+		var dx = tx - self.x;
+		var dy = ty - self.y;
+		var dist = Math.sqrt(dx * dx + dy * dy);
+		if (dist === 0) {
+			self.dx = 0;
+			self.dy = self.speed;
+		} else {
+			self.dx = dx / dist * self.speed;
+			self.dy = dy / dist * self.speed;
+		}
+	};
+	// Called every tick
+	self.update = function () {
+		if (!self.isAlive) return;
+		self.x += self.dx;
+		self.y += self.dy;
+	};
+	// Flash when hit
+	self.flash = function () {
+		tween(self, {
+			alpha: 0.2
+		}, {
+			duration: 60,
+			easing: tween.linear,
+			onFinish: function onFinish() {
+				tween(self, {
+					alpha: 1
+				}, {
+					duration: 120,
+					easing: tween.linear
+				});
+			}
+		});
+	};
+	// Destroy enemy
+	self.kill = function () {
+		self.isAlive = false;
+		self.visible = false;
+		self.destroy();
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x181c1f
+});
+
+/**** 
+* Game Code
+****/ 
+// Background music
+// Miss sound
+// Enemy destroyed sound
+// Shot sound
+// Muzzle flash: Ellipse, orange
+// Crosshair: Box, yellow
+// Enemy: Ellipse, red
+// Game area
+var GAME_W = 2048;
+var GAME_H = 2732;
+// Center point
+var CENTER_X = GAME_W / 2;
+var CENTER_Y = GAME_H / 2;
+// Score display
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: "#fff"
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Wave display
+var waveTxt = new Text2('1. Dalga', {
+	size: 70,
+	fill: 0xFFE066
+});
+waveTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(waveTxt);
+waveTxt.y = 120;
+// Crosshair
+var crosshair = new Crosshair();
+game.addChild(crosshair);
+crosshair.x = CENTER_X;
+crosshair.y = CENTER_Y;
+// Enemy array
+var enemies = [];
+// For drag/aim
+var isAiming = false;
+// Game state
+var wave = 1;
+var enemiesPerWave = 5;
+var enemiesSpawned = 0;
+var enemiesKilled = 0;
+var waveInProgress = false;
+var spawnTimer = null;
+var nextWaveTimeout = null;
+var gameOver = false;
+// Difficulty scaling
+function getEnemySpeed(wave) {
+	return 6 + (wave - 1) * 1.2;
+}
+function getEnemiesPerWave(wave) {
+	return 5 + (wave - 1) * 2;
+}
+// Spawn enemy at random edge, moving toward center
+function spawnEnemy() {
+	var edge = Math.floor(Math.random() * 4); // 0:top, 1:right, 2:bottom, 3:left
+	var ex, ey;
+	var margin = 120;
+	if (edge === 0) {
+		// top
+		ex = margin + Math.random() * (GAME_W - 2 * margin);
+		ey = -100;
+	} else if (edge === 1) {
+		// right
+		ex = GAME_W + 100;
+		ey = margin + Math.random() * (GAME_H - 2 * margin);
+	} else if (edge === 2) {
+		// bottom
+		ex = margin + Math.random() * (GAME_W - 2 * margin);
+		ey = GAME_H + 100;
+	} else {
+		// left
+		ex = -100;
+		ey = margin + Math.random() * (GAME_H - 2 * margin);
+	}
+	var enemy = new Enemy();
+	enemy.x = ex;
+	enemy.y = ey;
+	enemy.speed = getEnemySpeed(wave);
+	enemy.wave = wave;
+	enemy.setTarget(CENTER_X, CENTER_Y);
+	enemies.push(enemy);
+	game.addChild(enemy);
+	enemiesSpawned++;
+}
+// Start a wave
+function startWave() {
+	waveInProgress = true;
+	enemiesPerWave = getEnemiesPerWave(wave);
+	enemiesSpawned = 0;
+	enemiesKilled = 0;
+	waveTxt.setText(wave + ". Dalga");
+	spawnTimer = LK.setInterval(function () {
+		if (enemiesSpawned < enemiesPerWave) {
+			spawnEnemy();
+		}
+		if (enemiesSpawned >= enemiesPerWave) {
+			LK.clearInterval(spawnTimer);
+		}
+	}, 600 - Math.min(400, (wave - 1) * 40));
+}
+// End wave, start next after delay
+function endWave() {
+	waveInProgress = false;
+	nextWaveTimeout = LK.setTimeout(function () {
+		wave++;
+		startWave();
+	}, 1200);
+}
+// Reset game state
+function resetGame() {
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		enemies[i].kill();
+		enemies.splice(i, 1);
+	}
+	wave = 1;
+	LK.setScore(0);
+	scoreTxt.setText('0');
+	waveTxt.setText('1. Dalga');
+	gameOver = false;
+	if (spawnTimer) LK.clearInterval(spawnTimer);
+	if (nextWaveTimeout) LK.clearTimeout(nextWaveTimeout);
+	startWave();
+}
+// Check if enemy reached center (game over)
+function checkEnemyReachedCenter(enemy) {
+	var dx = enemy.x - CENTER_X;
+	var dy = enemy.y - CENTER_Y;
+	var dist = Math.sqrt(dx * dx + dy * dy);
+	if (dist < 90) {
+		return true;
+	}
+	return false;
+}
+// Check if point (x, y) hits enemy (circle hitbox)
+function isHit(enemy, x, y) {
+	var dx = enemy.x - x;
+	var dy = enemy.y - y;
+	var r = enemy.radius * 0.95;
+	return dx * dx + dy * dy <= r * r;
+}
+// Handle shooting
+function shootAt(x, y) {
+	if (gameOver) return;
+	crosshair.flash();
+	LK.getSound('shot').play();
+	// Find closest enemy under crosshair
+	var hitEnemy = null;
+	var minDist = 99999;
+	for (var i = 0; i < enemies.length; i++) {
+		var enemy = enemies[i];
+		if (!enemy.isAlive) continue;
+		if (isHit(enemy, x, y)) {
+			var dx = enemy.x - x;
+			var dy = enemy.y - y;
+			var dist = dx * dx + dy * dy;
+			if (dist < minDist) {
+				minDist = dist;
+				hitEnemy = enemy;
+			}
+		}
+	}
+	if (hitEnemy) {
+		hitEnemy.flash();
+		hitEnemy.kill();
+		LK.getSound('enemyDown').play();
+		LK.setScore(LK.getScore() + 1);
+		scoreTxt.setText(LK.getScore());
+		enemiesKilled++;
+		// Remove from array
+		for (var j = 0; j < enemies.length; j++) {
+			if (enemies[j] === hitEnemy) {
+				enemies.splice(j, 1);
+				break;
+			}
+		}
+		// If all enemies killed, end wave
+		if (enemiesKilled >= enemiesPerWave && enemiesSpawned >= enemiesPerWave) {
+			endWave();
+		}
+	} else {
+		LK.getSound('miss').play();
+	}
+}
+// Move crosshair with drag/tap
+function handleMove(x, y, obj) {
+	if (gameOver) return;
+	// Clamp inside game area
+	var nx = Math.max(60, Math.min(GAME_W - 60, x));
+	var ny = Math.max(60, Math.min(GAME_H - 60, y));
+	crosshair.x = nx;
+	crosshair.y = ny;
+}
+game.move = handleMove;
+// Touch down: aim and shoot
+game.down = function (x, y, obj) {
+	if (gameOver) return;
+	isAiming = true;
+	handleMove(x, y, obj);
+	shootAt(crosshair.x, crosshair.y);
+};
+game.up = function (x, y, obj) {
+	isAiming = false;
+};
+// Main update loop
+game.update = function () {
+	if (gameOver) return;
+	// Update enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var enemy = enemies[i];
+		enemy.update();
+		if (!enemy.isAlive) continue;
+		// Check if reached center
+		if (checkEnemyReachedCenter(enemy)) {
+			// Game over
+			gameOver = true;
+			LK.effects.flashScreen(0xff0000, 900);
+			LK.showGameOver();
+			return;
+		}
+	}
+};
+// Start music
+LK.playMusic('bgmusic', {
+	fade: {
+		start: 0,
+		end: 1,
+		duration: 800
+	}
+});
+// Start game
+resetGame();
\ No newline at end of file