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

/**** 
* Classes
****/ 
var MonsterBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('projectile', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	bulletGraphics.tint = 0xFF0000; // Red color for monster bullets
	self.speed = 10;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Projectile = Container.expand(function () {
	var self = Container.call(this);
	var projectileGraphics = self.attachAsset('projectile', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var SeaMonster = Container.expand(function () {
	var self = Container.call(this);
	var monsterGraphics = self.attachAsset('seaMonster', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8 + Math.random() * 6;
	self.health = 1;
	self.lastShotTime = 0;
	self.shotCooldown = 600 + Math.random() * 400; // Random shooting interval
	self.update = function () {
		self.y += self.speed;
		// Monster shooting logic
		if (Date.now() - self.lastShotTime > self.shotCooldown) {
			self.lastShotTime = Date.now();
			var bullet = new MonsterBullet();
			bullet.x = self.x;
			bullet.y = self.y + 50;
			bullet.lastY = bullet.y;
			monsterBullets.push(bullet);
			game.addChild(bullet);
		}
	};
	self.takeDamage = function () {
		self.health--;
		if (self.health <= 0) {
			LK.effects.flashObject(self, 0xFF0000, 200);
			return true; // Monster destroyed
		}
		return false;
	};
	return self;
});
var Ship = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('ship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.lastShotTime = 0;
	self.shotCooldown = 300; // milliseconds
	self.moveLeft = function () {
		self.x -= self.speed;
		if (self.x < shipGraphics.width / 2) {
			self.x = shipGraphics.width / 2;
		}
	};
	self.moveRight = function () {
		self.x += self.speed;
		if (self.x > 2048 - shipGraphics.width / 2) {
			self.x = 2048 - shipGraphics.width / 2;
		}
	};
	self.canShoot = function () {
		return Date.now() - self.lastShotTime > self.shotCooldown;
	};
	self.shoot = function () {
		if (self.canShoot()) {
			self.lastShotTime = Date.now();
			return true;
		}
		return false;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x006994
});

/**** 
* Game Code
****/ 
var ship;
var projectiles = [];
var seaMonsters = [];
var monsterBullets = [];
var dragNode = null;
var monsterSpawnTimer = 0;
var monsterSpawnInterval = 120; // frames
var difficultyTimer = 0;
// Initialize ship
ship = game.addChild(new Ship());
ship.x = 2048 / 2;
ship.y = 2732 - 150;
// Score display
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Health display
var healthTxt = new Text2('Health: 100', {
	size: 60,
	fill: 0xFFFFFF
});
healthTxt.anchor.set(0, 0);
healthTxt.x = 120;
healthTxt.y = 20;
LK.gui.topLeft.addChild(healthTxt);
// Level display
var levelTxt = new Text2('Level: 1', {
	size: 60,
	fill: 0xFFD700
});
levelTxt.anchor.set(1, 0);
levelTxt.x = -20;
levelTxt.y = 20;
LK.gui.topRight.addChild(levelTxt);
var playerHealth = 100;
var currentLevel = 1;
var maxLevel = 100;
var pointsPerLevel = 200;
function updateScore() {
	scoreTxt.setText('Score: ' + LK.getScore());
	checkLevelUp();
}
function updateHealth() {
	healthTxt.setText('Health: ' + playerHealth);
}
function updateLevel() {
	levelTxt.setText('Level: ' + currentLevel);
}
function checkLevelUp() {
	var newLevel = Math.floor(LK.getScore() / pointsPerLevel) + 1;
	if (newLevel > currentLevel && newLevel <= maxLevel) {
		currentLevel = newLevel;
		updateLevel();
		// Flash screen gold when leveling up
		LK.effects.flashScreen(0xFFD700, 800);
		// Increase difficulty with each level
		monsterSpawnInterval = Math.max(20, 120 - currentLevel * 2);
		return true;
	}
	return false;
}
function spawnMonster() {
	var monster = new SeaMonster();
	monster.x = Math.random() * (2048 - 100) + 50;
	monster.y = -50;
	monster.lastY = monster.y;
	seaMonsters.push(monster);
	game.addChild(monster);
}
function handleMove(x, y, obj) {
	if (dragNode === ship) {
		ship.x = x;
		if (ship.x < 60) ship.x = 60;
		if (ship.x > 2048 - 60) ship.x = 2048 - 60;
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	dragNode = ship;
	handleMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragNode = null;
};
game.update = function () {
	// Increase difficulty over time
	difficultyTimer++;
	if (difficultyTimer % 1800 === 0) {
		// Every 30 seconds
		monsterSpawnInterval = Math.max(30, monsterSpawnInterval - 10);
	}
	// Spawn monsters
	monsterSpawnTimer++;
	if (monsterSpawnTimer >= monsterSpawnInterval) {
		spawnMonster();
		monsterSpawnTimer = 0;
	}
	// Auto-shoot from ship
	if (ship.shoot()) {
		var projectile = new Projectile();
		projectile.x = ship.x;
		projectile.y = ship.y - 40;
		projectile.lastY = projectile.y;
		projectiles.push(projectile);
		game.addChild(projectile);
		LK.getSound('shoot').play();
	}
	// Update and check projectiles
	for (var i = projectiles.length - 1; i >= 0; i--) {
		var projectile = projectiles[i];
		// Check if projectile went off screen
		if (projectile.lastY >= -20 && projectile.y < -20) {
			projectile.destroy();
			projectiles.splice(i, 1);
			continue;
		}
		// Check projectile-monster collisions
		var hit = false;
		for (var j = seaMonsters.length - 1; j >= 0; j--) {
			var monster = seaMonsters[j];
			if (projectile.intersects(monster)) {
				if (monster.takeDamage()) {
					LK.setScore(LK.getScore() + 10);
					updateScore();
					LK.getSound('hit').play();
					monster.destroy();
					seaMonsters.splice(j, 1);
				}
				projectile.destroy();
				projectiles.splice(i, 1);
				hit = true;
				break;
			}
		}
		if (!hit) {
			projectile.lastY = projectile.y;
		}
	}
	// Update and check monster bullets
	for (var b = monsterBullets.length - 1; b >= 0; b--) {
		var bullet = monsterBullets[b];
		// Check if bullet hit ship
		if (bullet.intersects(ship)) {
			playerHealth -= 15;
			updateHealth();
			LK.effects.flashScreen(0xFF0000, 300);
			bullet.destroy();
			monsterBullets.splice(b, 1);
			if (playerHealth <= 0) {
				LK.showGameOver();
				return;
			}
			continue;
		}
		// Check if bullet went off screen (bottom)
		if (bullet.lastY <= 2732 + 20 && bullet.y > 2732 + 20) {
			bullet.destroy();
			monsterBullets.splice(b, 1);
			continue;
		}
		bullet.lastY = bullet.y;
	}
	// Update and check sea monsters
	for (var k = seaMonsters.length - 1; k >= 0; k--) {
		var monster = seaMonsters[k];
		// Check if monster reached ship
		if (monster.intersects(ship)) {
			playerHealth -= 20;
			updateHealth();
			LK.effects.flashScreen(0xFF0000, 500);
			monster.destroy();
			seaMonsters.splice(k, 1);
			if (playerHealth <= 0) {
				LK.showGameOver();
				return;
			}
			continue;
		}
		// Check if monster went off screen (bottom) - player loses health
		if (monster.lastY <= 2732 + 50 && monster.y > 2732 + 50) {
			playerHealth -= 10; // Lose health when monster passes
			updateHealth();
			LK.effects.flashScreen(0xFFFF00, 200); // Yellow flash for passed monster
			monster.destroy();
			seaMonsters.splice(k, 1);
			if (playerHealth <= 0) {
				LK.showGameOver();
				return;
			}
			continue;
		}
		monster.lastY = monster.y;
	}
	// Win condition - reach level 100
	if (currentLevel >= maxLevel) {
		LK.showYouWin();
	}
};
// Start background music
LK.playMusic('ocean');
// Initialize displays
updateScore();
updateHealth();
updateLevel();

===================================================================
--- original.js
+++ change.js
@@ -135,15 +135,44 @@
 healthTxt.anchor.set(0, 0);
 healthTxt.x = 120;
 healthTxt.y = 20;
 LK.gui.topLeft.addChild(healthTxt);
+// Level display
+var levelTxt = new Text2('Level: 1', {
+	size: 60,
+	fill: 0xFFD700
+});
+levelTxt.anchor.set(1, 0);
+levelTxt.x = -20;
+levelTxt.y = 20;
+LK.gui.topRight.addChild(levelTxt);
 var playerHealth = 100;
+var currentLevel = 1;
+var maxLevel = 100;
+var pointsPerLevel = 200;
 function updateScore() {
 	scoreTxt.setText('Score: ' + LK.getScore());
+	checkLevelUp();
 }
 function updateHealth() {
 	healthTxt.setText('Health: ' + playerHealth);
 }
+function updateLevel() {
+	levelTxt.setText('Level: ' + currentLevel);
+}
+function checkLevelUp() {
+	var newLevel = Math.floor(LK.getScore() / pointsPerLevel) + 1;
+	if (newLevel > currentLevel && newLevel <= maxLevel) {
+		currentLevel = newLevel;
+		updateLevel();
+		// Flash screen gold when leveling up
+		LK.effects.flashScreen(0xFFD700, 800);
+		// Increase difficulty with each level
+		monsterSpawnInterval = Math.max(20, 120 - currentLevel * 2);
+		return true;
+	}
+	return false;
+}
 function spawnMonster() {
 	var monster = new SeaMonster();
 	monster.x = Math.random() * (2048 - 100) + 50;
 	monster.y = -50;
@@ -274,14 +303,15 @@
 			continue;
 		}
 		monster.lastY = monster.y;
 	}
-	// Win condition (optional high score target)
-	if (LK.getScore() >= 1000) {
+	// Win condition - reach level 100
+	if (currentLevel >= maxLevel) {
 		LK.showYouWin();
 	}
 };
 // Start background music
 LK.playMusic('ocean');
 // Initialize displays
 updateScore();
-updateHealth();
\ No newline at end of file
+updateHealth();
+updateLevel();
\ No newline at end of file