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

/**** 
* Classes
****/ 
var AmmoPack = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('ammoPack', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.ammoAmount = 10;
	return self;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.speed = 12;
	self.damage = 1;
	self.setDirection = function (targetX, targetY) {
		var dx = targetX - self.x;
		var dy = targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			self.velocityX = dx / distance * self.speed;
			self.velocityY = dy / distance * self.speed;
		}
	};
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
	};
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.level = 1;
	self.health = 1;
	self.maxHealth = 1;
	self.speed = 2;
	self.damage = 1;
	self.lastAttackTime = 0;
	self.attackCooldown = 2000; // 2 seconds between attacks
	self.setLevel = function (level) {
		self.level = level;
		if (level <= 9) {
			self.health = level;
			self.maxHealth = level;
		} else {
			self.health = 15;
			self.maxHealth = 15;
		}
		self.damage = level;
		self.speed = 2 + level * 0.3;
		// Visual scaling based on level
		var scale = 1 + level * 0.1;
		graphics.scaleX = scale;
		graphics.scaleY = scale;
	};
	self.takeDamage = function (damage) {
		damage = damage || 1;
		self.health -= damage;
		// Flash white when hit
		tween(graphics, {
			tint: 0xFFFFFF
		}, {
			duration: 100,
			onFinish: function onFinish() {
				tween(graphics, {
					tint: 0xFFFFFF
				}, {
					duration: 100
				});
			}
		});
		return self.health <= 0;
	};
	self.update = function () {
		if (!player) return;
		// Move towards player
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
		// Attack player if close enough and cooldown is ready
		if (distance < 50 && Date.now() - self.lastAttackTime > self.attackCooldown) {
			player.takeDamage(self.damage);
			self.lastAttackTime = Date.now();
		}
	};
	return self;
});
var HealthPack = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('healthPack', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.healAmount = 25;
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 100;
	self.maxHealth = 100;
	self.speed = 8;
	self.ammo = 30;
	self.weaponLevel = 1;
	self.weaponDamage = 1;
	self.takeDamage = function (damage) {
		self.health -= damage;
		if (self.health < 0) self.health = 0;
		// Flash red when taking damage
		tween(graphics, {
			tint: 0xFF0000
		}, {
			duration: 100,
			onFinish: function onFinish() {
				tween(graphics, {
					tint: 0xFFFFFF
				}, {
					duration: 100
				});
			}
		});
	};
	self.heal = function (amount) {
		self.health += amount;
		if (self.health > self.maxHealth) self.health = self.maxHealth;
		// Flash green when healing
		tween(graphics, {
			tint: 0x00FF00
		}, {
			duration: 200,
			onFinish: function onFinish() {
				tween(graphics, {
					tint: 0xFFFFFF
				}, {
					duration: 200
				});
			}
		});
	};
	self.addAmmo = function (amount) {
		self.ammo += amount;
		// Flash blue when getting ammo
		tween(graphics, {
			tint: 0x0000FF
		}, {
			duration: 200,
			onFinish: function onFinish() {
				tween(graphics, {
					tint: 0xFFFFFF
				}, {
					duration: 200
				});
			}
		});
	};
	self.upgradeWeapon = function (newLevel) {
		if (newLevel > self.weaponLevel) {
			self.weaponLevel = newLevel;
			self.weaponDamage = newLevel;
			// Flash gold when upgrading weapon
			tween(graphics, {
				tint: 0xFFD700
			}, {
				duration: 300,
				onFinish: function onFinish() {
					tween(graphics, {
						tint: 0xFFFFFF
					}, {
						duration: 300
					});
				}
			});
		}
	};
	return self;
});
var WeaponPickup = Container.expand(function () {
	var self = Container.call(this);
	self.weaponLevel = 1;
	self.damage = 1;
	var graphics;
	self.setWeaponLevel = function (level) {
		self.weaponLevel = level;
		self.damage = level;
		// Remove old graphics if exists
		if (graphics) {
			self.removeChild(graphics);
		}
		// Add new graphics based on level
		var assetName = 'weapon' + level;
		graphics = self.attachAsset(assetName, {
			anchorX: 0.5,
			anchorY: 0.5
		});
		// Different colors for different levels
		var colors = [0xFFFFFF, 0x00FF00, 0x0080FF, 0xFF00FF];
		graphics.tint = colors[level] || 0xFFFFFF;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2E7D32
});

/**** 
* Game Code
****/ 
var player;
var enemies = [];
var bullets = [];
var healthPacks = [];
var ammoPacks = [];
var weaponPickups = [];
var currentEnemyLevel = 1;
var lastEnemySpawn = 0;
var enemySpawnRate = 2000; // 2 seconds
var lastHealthPackSpawn = 0;
var healthPackSpawnRate = 8000; // 8 seconds
var lastAmmoPackSpawn = 0;
var ammoPackSpawnRate = 6000; // 6 seconds
var lastWeaponSpawn = 0;
var weaponSpawnRate = 15000; // 15 seconds for rare weapon spawns
var moveDirection = {
	x: 0,
	y: 0
};
// Create player
player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 / 2;
// UI Elements
var healthText = new Text2('Health: 100', {
	size: 60,
	fill: 0xFF4081
});
healthText.anchor.set(0, 0);
LK.gui.topLeft.addChild(healthText);
healthText.x = 120; // Avoid platform menu
var ammoText = new Text2('Ammo: 30', {
	size: 60,
	fill: 0x2196F3
});
ammoText.anchor.set(0, 0);
LK.gui.topLeft.addChild(ammoText);
ammoText.x = 120; // Avoid platform menu
ammoText.y = 80;
var scoreText = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFEB3B
});
scoreText.anchor.set(1, 0);
LK.gui.topRight.addChild(scoreText);
var levelText = new Text2('Enemy Level: 1', {
	size: 60,
	fill: 0xFF5722
});
levelText.anchor.set(1, 0);
LK.gui.topRight.addChild(levelText);
levelText.y = 80;
var weaponText = new Text2('Weapon: Lv1', {
	size: 60,
	fill: 0x9C27B0
});
weaponText.anchor.set(1, 0);
LK.gui.topRight.addChild(weaponText);
weaponText.y = 160;
// Movement controls
var moveUpButton = LK.getAsset('player', {
	anchorX: 0.5,
	anchorY: 0.5,
	width: 100,
	scaleY: 0.6,
	alpha: 0.5
});
game.addChild(moveUpButton);
moveUpButton.x = 200;
moveUpButton.y = 2732 - 400;
var moveDownButton = LK.getAsset('player', {
	anchorX: 0.5,
	anchorY: 0.5,
	width: 100,
	scaleY: 0.6,
	alpha: 0.5
});
game.addChild(moveDownButton);
moveDownButton.x = 200;
moveDownButton.y = 2732 - 200;
var moveLeftButton = LK.getAsset('player', {
	anchorX: 0.5,
	anchorY: 0.5,
	width: 100,
	scaleY: 1.2,
	alpha: 0.5
});
game.addChild(moveLeftButton);
moveLeftButton.x = 100;
moveLeftButton.y = 2732 - 300;
var moveRightButton = LK.getAsset('player', {
	anchorX: 0.5,
	anchorY: 0.5,
	width: 100,
	scaleY: 1.2,
	alpha: 0.5
});
game.addChild(moveRightButton);
moveRightButton.x = 300;
moveRightButton.y = 2732 - 300;
// Control handlers
moveUpButton.down = function () {
	moveDirection.y = -1;
};
moveUpButton.up = function () {
	moveDirection.y = 0;
};
moveDownButton.down = function () {
	moveDirection.y = 1;
};
moveDownButton.up = function () {
	moveDirection.y = 0;
};
moveLeftButton.down = function () {
	moveDirection.x = -1;
};
moveLeftButton.up = function () {
	moveDirection.x = 0;
};
moveRightButton.down = function () {
	moveDirection.x = 1;
};
moveRightButton.up = function () {
	moveDirection.x = 0;
};
// Shooting
game.down = function (x, y) {
	if (player.ammo <= 0) return;
	// Don't shoot if touching movement controls
	if (x < 400 && y > 2732 - 500) return;
	var bullet = new Bullet();
	bullet.x = player.x;
	bullet.y = player.y;
	bullet.damage = player.weaponDamage;
	bullet.setDirection(x, y);
	bullets.push(bullet);
	game.addChild(bullet);
	player.ammo--;
	LK.getSound('shoot').play();
};
function spawnEnemy() {
	var enemy = new Enemy();
	enemy.setLevel(currentEnemyLevel);
	// Spawn at random edge of screen
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			enemy.x = Math.random() * 2048;
			enemy.y = -50;
			break;
		case 1:
			// Right
			enemy.x = 2048 + 50;
			enemy.y = Math.random() * 2732;
			break;
		case 2:
			// Bottom
			enemy.x = Math.random() * 2048;
			enemy.y = 2732 + 50;
			break;
		case 3:
			// Left
			enemy.x = -50;
			enemy.y = Math.random() * 2732;
			break;
	}
	enemies.push(enemy);
	game.addChild(enemy);
}
function spawnHealthPack() {
	var healthPack = new HealthPack();
	healthPack.x = Math.random() * (2048 - 100) + 50;
	healthPack.y = Math.random() * (2732 - 100) + 50;
	healthPacks.push(healthPack);
	game.addChild(healthPack);
}
function spawnAmmoPack() {
	var ammoPack = new AmmoPack();
	ammoPack.x = Math.random() * (2048 - 100) + 50;
	ammoPack.y = Math.random() * (2732 - 100) + 50;
	ammoPacks.push(ammoPack);
	game.addChild(ammoPack);
}
function spawnWeapon() {
	// Don't spawn weapons lower than player's current level
	var maxLevel = 3;
	var minLevel = player.weaponLevel + 1;
	if (minLevel > maxLevel) return; // Player already has max weapon
	var weaponLevel = Math.floor(Math.random() * (maxLevel - minLevel + 1)) + minLevel;
	var weapon = new WeaponPickup();
	weapon.setWeaponLevel(weaponLevel);
	weapon.x = Math.random() * (2048 - 100) + 50;
	weapon.y = Math.random() * (2732 - 100) + 50;
	weaponPickups.push(weapon);
	game.addChild(weapon);
}
game.update = function () {
	var now = Date.now();
	// Update enemy level based on score
	var newLevel = Math.floor(LK.getScore() / 100) + 1;
	if (newLevel > 10) newLevel = 10;
	if (newLevel !== currentEnemyLevel) {
		currentEnemyLevel = newLevel;
		levelText.setText('Enemy Level: ' + currentEnemyLevel);
	}
	// Player movement
	if (moveDirection.x !== 0 || moveDirection.y !== 0) {
		var newX = player.x + moveDirection.x * player.speed;
		var newY = player.y + moveDirection.y * player.speed;
		// Keep player on screen
		if (newX >= 40 && newX <= 2048 - 40) player.x = newX;
		if (newY >= 40 && newY <= 2732 - 40) player.y = newY;
	}
	// Spawn enemies
	if (now - lastEnemySpawn > enemySpawnRate) {
		spawnEnemy();
		lastEnemySpawn = now;
	}
	// Spawn health packs
	if (now - lastHealthPackSpawn > healthPackSpawnRate) {
		spawnHealthPack();
		lastHealthPackSpawn = now;
	}
	// Spawn ammo packs
	if (now - lastAmmoPackSpawn > ammoPackSpawnRate) {
		spawnAmmoPack();
		lastAmmoPackSpawn = now;
	}
	// Spawn weapons (rare)
	if (now - lastWeaponSpawn > weaponSpawnRate) {
		spawnWeapon();
		lastWeaponSpawn = now;
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Remove off-screen bullets
		if (bullet.x < -50 || bullet.x > 2048 + 50 || bullet.y < -50 || bullet.y > 2732 + 50) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check bullet-enemy collisions
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				if (enemy.takeDamage(bullet.damage)) {
					// Enemy destroyed
					LK.setScore(LK.getScore() + 10);
					scoreText.setText('Score: ' + LK.getScore());
					enemy.destroy();
					enemies.splice(j, 1);
				}
				LK.getSound('enemyHit').play();
				bullet.destroy();
				bullets.splice(i, 1);
				break;
			}
		}
	}
	// Check player-health pack collisions
	for (var i = healthPacks.length - 1; i >= 0; i--) {
		var healthPack = healthPacks[i];
		if (player.intersects(healthPack)) {
			player.heal(healthPack.healAmount);
			LK.getSound('pickup').play();
			healthPack.destroy();
			healthPacks.splice(i, 1);
		}
	}
	// Check player-ammo pack collisions
	for (var i = ammoPacks.length - 1; i >= 0; i--) {
		var ammoPack = ammoPacks[i];
		if (player.intersects(ammoPack)) {
			player.addAmmo(ammoPack.ammoAmount);
			LK.getSound('pickup').play();
			ammoPack.destroy();
			ammoPacks.splice(i, 1);
		}
	}
	// Check player-weapon pickup collisions
	for (var i = weaponPickups.length - 1; i >= 0; i--) {
		var weaponPickup = weaponPickups[i];
		if (player.intersects(weaponPickup)) {
			player.upgradeWeapon(weaponPickup.weaponLevel);
			LK.getSound('pickup').play();
			weaponPickup.destroy();
			weaponPickups.splice(i, 1);
		}
	}
	// Update UI
	healthText.setText('Health: ' + player.health);
	ammoText.setText('Ammo: ' + player.ammo);
	weaponText.setText('Weapon: Lv' + player.weaponLevel);
	// Check game over
	if (player.health <= 0) {
		LK.showGameOver();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -23,8 +23,9 @@
 	});
 	self.velocityX = 0;
 	self.velocityY = 0;
 	self.speed = 12;
+	self.damage = 1;
 	self.setDirection = function (targetX, targetY) {
 		var dx = targetX - self.x;
 		var dy = targetY - self.y;
 		var distance = Math.sqrt(dx * dx + dy * dy);
@@ -67,10 +68,11 @@
 		var scale = 1 + level * 0.1;
 		graphics.scaleX = scale;
 		graphics.scaleY = scale;
 	};
-	self.takeDamage = function () {
-		self.health--;
+	self.takeDamage = function (damage) {
+		damage = damage || 1;
+		self.health -= damage;
 		// Flash white when hit
 		tween(graphics, {
 			tint: 0xFFFFFF
 		}, {
@@ -121,8 +123,10 @@
 	self.health = 100;
 	self.maxHealth = 100;
 	self.speed = 8;
 	self.ammo = 30;
+	self.weaponLevel = 1;
+	self.weaponDamage = 1;
 	self.takeDamage = function (damage) {
 		self.health -= damage;
 		if (self.health < 0) self.health = 0;
 		// Flash red when taking damage
@@ -171,10 +175,53 @@
 				});
 			}
 		});
 	};
+	self.upgradeWeapon = function (newLevel) {
+		if (newLevel > self.weaponLevel) {
+			self.weaponLevel = newLevel;
+			self.weaponDamage = newLevel;
+			// Flash gold when upgrading weapon
+			tween(graphics, {
+				tint: 0xFFD700
+			}, {
+				duration: 300,
+				onFinish: function onFinish() {
+					tween(graphics, {
+						tint: 0xFFFFFF
+					}, {
+						duration: 300
+					});
+				}
+			});
+		}
+	};
 	return self;
 });
+var WeaponPickup = Container.expand(function () {
+	var self = Container.call(this);
+	self.weaponLevel = 1;
+	self.damage = 1;
+	var graphics;
+	self.setWeaponLevel = function (level) {
+		self.weaponLevel = level;
+		self.damage = level;
+		// Remove old graphics if exists
+		if (graphics) {
+			self.removeChild(graphics);
+		}
+		// Add new graphics based on level
+		var assetName = 'weapon' + level;
+		graphics = self.attachAsset(assetName, {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+		// Different colors for different levels
+		var colors = [0xFFFFFF, 0x00FF00, 0x0080FF, 0xFF00FF];
+		graphics.tint = colors[level] || 0xFFFFFF;
+	};
+	return self;
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -189,15 +236,18 @@
 var enemies = [];
 var bullets = [];
 var healthPacks = [];
 var ammoPacks = [];
+var weaponPickups = [];
 var currentEnemyLevel = 1;
 var lastEnemySpawn = 0;
 var enemySpawnRate = 2000; // 2 seconds
 var lastHealthPackSpawn = 0;
 var healthPackSpawnRate = 8000; // 8 seconds
 var lastAmmoPackSpawn = 0;
 var ammoPackSpawnRate = 6000; // 6 seconds
+var lastWeaponSpawn = 0;
+var weaponSpawnRate = 15000; // 15 seconds for rare weapon spawns
 var moveDirection = {
 	x: 0,
 	y: 0
 };
@@ -233,8 +283,15 @@
 });
 levelText.anchor.set(1, 0);
 LK.gui.topRight.addChild(levelText);
 levelText.y = 80;
+var weaponText = new Text2('Weapon: Lv1', {
+	size: 60,
+	fill: 0x9C27B0
+});
+weaponText.anchor.set(1, 0);
+LK.gui.topRight.addChild(weaponText);
+weaponText.y = 160;
 // Movement controls
 var moveUpButton = LK.getAsset('player', {
 	anchorX: 0.5,
 	anchorY: 0.5,
@@ -307,8 +364,9 @@
 	if (x < 400 && y > 2732 - 500) return;
 	var bullet = new Bullet();
 	bullet.x = player.x;
 	bullet.y = player.y;
+	bullet.damage = player.weaponDamage;
 	bullet.setDirection(x, y);
 	bullets.push(bullet);
 	game.addChild(bullet);
 	player.ammo--;
@@ -357,8 +415,21 @@
 	ammoPack.y = Math.random() * (2732 - 100) + 50;
 	ammoPacks.push(ammoPack);
 	game.addChild(ammoPack);
 }
+function spawnWeapon() {
+	// Don't spawn weapons lower than player's current level
+	var maxLevel = 3;
+	var minLevel = player.weaponLevel + 1;
+	if (minLevel > maxLevel) return; // Player already has max weapon
+	var weaponLevel = Math.floor(Math.random() * (maxLevel - minLevel + 1)) + minLevel;
+	var weapon = new WeaponPickup();
+	weapon.setWeaponLevel(weaponLevel);
+	weapon.x = Math.random() * (2048 - 100) + 50;
+	weapon.y = Math.random() * (2732 - 100) + 50;
+	weaponPickups.push(weapon);
+	game.addChild(weapon);
+}
 game.update = function () {
 	var now = Date.now();
 	// Update enemy level based on score
 	var newLevel = Math.floor(LK.getScore() / 100) + 1;
@@ -389,8 +460,13 @@
 	if (now - lastAmmoPackSpawn > ammoPackSpawnRate) {
 		spawnAmmoPack();
 		lastAmmoPackSpawn = now;
 	}
+	// Spawn weapons (rare)
+	if (now - lastWeaponSpawn > weaponSpawnRate) {
+		spawnWeapon();
+		lastWeaponSpawn = now;
+	}
 	// Update bullets
 	for (var i = bullets.length - 1; i >= 0; i--) {
 		var bullet = bullets[i];
 		// Remove off-screen bullets
@@ -402,9 +478,9 @@
 		// Check bullet-enemy collisions
 		for (var j = enemies.length - 1; j >= 0; j--) {
 			var enemy = enemies[j];
 			if (bullet.intersects(enemy)) {
-				if (enemy.takeDamage()) {
+				if (enemy.takeDamage(bullet.damage)) {
 					// Enemy destroyed
 					LK.setScore(LK.getScore() + 10);
 					scoreText.setText('Score: ' + LK.getScore());
 					enemy.destroy();
@@ -436,11 +512,22 @@
 			ammoPack.destroy();
 			ammoPacks.splice(i, 1);
 		}
 	}
+	// Check player-weapon pickup collisions
+	for (var i = weaponPickups.length - 1; i >= 0; i--) {
+		var weaponPickup = weaponPickups[i];
+		if (player.intersects(weaponPickup)) {
+			player.upgradeWeapon(weaponPickup.weaponLevel);
+			LK.getSound('pickup').play();
+			weaponPickup.destroy();
+			weaponPickups.splice(i, 1);
+		}
+	}
 	// Update UI
 	healthText.setText('Health: ' + player.health);
 	ammoText.setText('Ammo: ' + player.ammo);
+	weaponText.setText('Weapon: Lv' + player.weaponLevel);
 	// Check game over
 	if (player.health <= 0) {
 		LK.showGameOver();
 	}