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

/**** 
* Classes
****/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphic = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 20;
	self.speed = 2;
	self.damage = 10;
	self.attackCooldown = 0;
	self.attackCooldownMax = 30; // Frames between attacks
	self.experienceValue = 1;
	self.hitByKatana = false;
	self.katanaHitTimer = 0;
	self.update = function () {
		if (player.isDead) return;
		// Move toward player
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		// Normalize and apply speed
		if (distance > 0) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
		// Attack cooldown
		if (self.attackCooldown > 0) {
			self.attackCooldown--;
		}
		// Decrement katana hit timer if active
		if (self.katanaHitTimer > 0) {
			self.katanaHitTimer--;
			if (self.katanaHitTimer === 0) {
				self.hitByKatana = false;
			}
		}
		// Attack player if touching and not recently hit by katana
		if (self.intersects(player) && self.attackCooldown === 0 && !self.hitByKatana) {
			player.takeDamage(self.damage);
			self.attackCooldown = self.attackCooldownMax;
		}
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		// Flash white when damaged
		tween(enemyGraphic, {
			tint: 0xFFFFFF
		}, {
			duration: 50,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(enemyGraphic, {
					tint: 0xff2222 // Return to original enemy color
				}, {
					duration: 50,
					easing: tween.easeIn
				});
			}
		});
		// Create explosion effect
		var explosion = new Explosion();
		explosion.x = self.x;
		explosion.y = self.y;
		game.addChild(explosion);
		// Add a small bounce effect using tween
		tween(self, {
			y: self.y - 10
		}, {
			duration: 100,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(self, {
					y: self.y + 10
				}, {
					duration: 100,
					easing: tween.easeIn
				});
			}
		});
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		// Spawn experience gem
		var expGem = new ExperienceGem();
		expGem.value = self.experienceValue;
		expGem.x = self.x;
		expGem.y = self.y;
		game.addChild(expGem);
		experienceGems.push(expGem);
		// Remove from enemies array and destroy
		var index = enemies.indexOf(self);
		if (index !== -1) {
			enemies.splice(index, 1);
		}
		self.destroy();
		// Increment kill count
		killCount++;
		killCountText.setText("Kills: " + killCount);
	};
	return self;
});
var ExperienceGem = Container.expand(function () {
	var self = Container.call(this);
	var gemGraphic = self.attachAsset('expGem', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.value = 1;
	self.speed = 0;
	self.magnetRange = 200;
	self.isMovingToPlayer = false;
	self.update = function () {
		if (player.isDead) return;
		// Calculate distance to player
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		// If close to player, move toward player (magnetic effect)
		if (distance < self.magnetRange || self.isMovingToPlayer) {
			self.isMovingToPlayer = true;
			self.speed += 0.2;
			self.speed = Math.min(self.speed, 15);
			if (distance > 0) {
				self.x += dx / distance * self.speed;
				self.y += dy / distance * self.speed;
			}
		}
		// If touching player, give experience
		if (self.intersects(player)) {
			player.gainExperience(self.value);
			// Remove from array and destroy
			var index = experienceGems.indexOf(self);
			if (index !== -1) {
				experienceGems.splice(index, 1);
			}
			self.destroy();
		}
	};
	return self;
});
var Explosion = Container.expand(function () {
	var self = Container.call(this);
	var explosionGraphic = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0xFFA500
	});
	self.lifetime = 0;
	self.maxLifetime = 15; // Short lifetime for quick explosion effect
	self.update = function () {
		self.lifetime++;
		// Scale up and fade out
		var progress = self.lifetime / self.maxLifetime;
		explosionGraphic.scale.x = 1 + progress;
		explosionGraphic.scale.y = 1 + progress;
		explosionGraphic.alpha = 1 - progress;
		// Destroy when animation complete
		if (self.lifetime >= self.maxLifetime) {
			self.destroy();
		}
	};
	return self;
});
var Katana = Container.expand(function () {
	var self = Container.call(this);
	var katanaGraphic = self.attachAsset('katana', {
		anchorX: 0,
		anchorY: 0.5
	});
	self.damage = 10;
	self.rotationSpeed = 0.1;
	self.attackCooldown = 0;
	self.attackCooldownMax = 20; // Frames between attacks
	self.level = 1;
	self.update = function () {
		if (player.isDead) return;
		// Rotate around player
		self.rotation += self.rotationSpeed;
		// Attack cooldown
		if (self.attackCooldown > 0) {
			self.attackCooldown--;
		}
		// Check for enemies in range and attack
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			if (self.intersects(enemy) && self.attackCooldown === 0) {
				enemy.takeDamage(self.damage);
				self.attackCooldown = self.attackCooldownMax;
				LK.getSound('slash').play();
				// Mark enemy as being hit by katana - this will be used to prevent damage to player
				enemy.hitByKatana = true;
				enemy.katanaHitTimer = 30; // Frames of immunity after being hit
				// Don't break, allow the katana to hit multiple enemies in a single swing
			}
		}
	};
	self.levelUp = function () {
		self.level += 1;
		self.damage += 5;
		self.attackCooldownMax = Math.max(10, self.attackCooldownMax - 2);
	};
	return self;
});
var LevelUpEffect = Container.expand(function () {
	var self = Container.call(this);
	var effectGraphic = self.attachAsset('levelUpIndicator', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.7
	});
	self.lifetime = 0;
	self.maxLifetime = 60; // 1 second at 60fps
	self.update = function () {
		self.lifetime++;
		// Scale up and fade out
		var progress = self.lifetime / self.maxLifetime;
		effectGraphic.scale.x = 1 + progress;
		effectGraphic.scale.y = 1 + progress;
		effectGraphic.alpha = 0.7 * (1 - progress);
		if (self.lifetime >= self.maxLifetime) {
			self.destroy();
		}
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerBody = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.health = 100;
	self.maxHealth = 100;
	self.level = 1;
	self.experience = 0;
	self.experienceToNextLevel = 10;
	self.isDead = false;
	// Health display
	self.healthBar = new Container();
	self.healthBar.y = -70;
	self.healthBarBg = LK.getAsset('player', {
		width: 100,
		height: 10,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x222222
	});
	self.healthBarFill = LK.getAsset('player', {
		width: 100,
		height: 10,
		anchorX: 0,
		anchorY: 0.5,
		tint: 0x00FF00
	});
	self.healthBarFill.x = -50;
	self.healthBar.addChild(self.healthBarBg);
	self.healthBar.addChild(self.healthBarFill);
	self.addChild(self.healthBar);
	self.update = function () {
		if (self.isDead) return;
		// Update health bar
		self.healthBarFill.width = 100 * (self.health / self.maxHealth);
	};
	self.takeDamage = function (amount) {
		if (self.isDead) return;
		self.health -= amount;
		if (self.health <= 0) {
			self.health = 0;
			self.die();
		} else {
			// Flash red when damaged
			LK.effects.flashObject(playerBody, 0xFF0000, 200);
		}
	};
	self.gainExperience = function (amount) {
		if (self.isDead) return;
		self.experience += amount;
		if (self.experience >= self.experienceToNextLevel) {
			self.levelUp();
		}
	};
	self.levelUp = function () {
		self.level += 1;
		self.experience = 0;
		self.experienceToNextLevel = Math.floor(self.experienceToNextLevel * 1.5);
		self.maxHealth += 10;
		self.health = self.maxHealth;
		// Level up effects
		var levelUpEffect = new LevelUpEffect();
		levelUpEffect.x = self.x;
		levelUpEffect.y = self.y;
		game.addChild(levelUpEffect);
		LK.getSound('levelup').play();
	};
	self.die = function () {
		if (self.isDead) return;
		self.isDead = true;
		LK.getSound('death').play();
		LK.effects.flashObject(playerBody, 0xFF0000, 1000);
		// Game over after a short delay
		LK.setTimeout(function () {
			LK.showGameOver();
		}, 1000);
	};
	return self;
});
var Shuriken = Container.expand(function () {
	var self = Container.call(this);
	var shurikenGraphic = self.attachAsset('shuriken', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.damage = 15;
	self.speed = 10;
	self.direction = {
		x: 0,
		y: 0
	};
	self.pierceCount = 1; // How many enemies it can hit before disappearing
	self.hitEnemies = []; // Track which enemies we've already hit
	self.level = 1;
	self.update = function () {
		// Move in direction
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
		// Rotate the shuriken for effect
		shurikenGraphic.rotation += 0.2;
		// Check if off screen
		if (self.x < -100 || self.x > 2148 || self.y < -100 || self.y > 2832) {
			self.destroy();
			var index = shurikens.indexOf(self);
			if (index !== -1) {
				shurikens.splice(index, 1);
			}
			return;
		}
		// Check for enemy collisions
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			// Skip enemies we've already hit
			if (self.hitEnemies.indexOf(enemy) !== -1) {
				continue;
			}
			if (self.intersects(enemy)) {
				enemy.takeDamage(self.damage);
				LK.getSound('hit').play();
				self.hitEnemies.push(enemy);
				// If we've hit enough enemies, destroy this shuriken
				if (self.hitEnemies.length >= self.pierceCount) {
					self.destroy();
					var index = shurikens.indexOf(self);
					if (index !== -1) {
						shurikens.splice(index, 1);
					}
					return;
				}
			}
		}
	};
	self.levelUp = function () {
		self.level += 1;
		self.damage += 5;
		self.pierceCount += 1;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// Global variables
var player;
var katana;
var shurikens = [];
var enemies = [];
var experienceGems = [];
var dragPosition = null;
var gameTime = 0;
var shurikenTimer = 0;
var enemySpawnTimer = 0;
var waveNumber = 1;
var killCount = 0;
// UI elements
var timeText;
var waveText;
var killCountText;
var levelText;
// Initialize player
player = new Player();
player.x = 2048 / 2;
player.y = 2732 / 2;
game.addChild(player);
// Initialize katana
katana = new Katana();
player.addChild(katana);
// Initialize UI
timeText = new Text2('Time: 0s', {
	size: 60,
	fill: 0xFFFFFF
});
timeText.anchor.set(1, 0);
LK.gui.topRight.addChild(timeText);
waveText = new Text2('Wave: 1', {
	size: 60,
	fill: 0xFFFFFF
});
waveText.anchor.set(0.5, 0);
LK.gui.top.addChild(waveText);
killCountText = new Text2('Kills: 0', {
	size: 60,
	fill: 0xFFFFFF
});
killCountText.anchor.set(0, 0);
LK.gui.topRight.addChild(killCountText);
killCountText.y = 70;
levelText = new Text2('Level: 1', {
	size: 60,
	fill: 0xFFFFFF
});
levelText.anchor.set(0, 0);
LK.gui.topLeft.addChild(levelText);
levelText.x = 120; // Avoid platform level menu icon area
// Spawn initial enemies
spawnEnemyWave(5);
// Play background music
LK.playMusic('bgmusic');
// Handle player movement
game.down = function (x, y, obj) {
	dragPosition = {
		x: x,
		y: y
	};
};
game.move = function (x, y, obj) {
	if (dragPosition) {
		player.x = x;
		player.y = y;
	}
};
game.up = function (x, y, obj) {
	dragPosition = null;
};
// Main game update loop
game.update = function () {
	if (player.isDead) return;
	// Update game time (in seconds)
	gameTime += 1 / 60;
	timeText.setText('Time: ' + Math.floor(gameTime) + 's');
	// Update level text
	levelText.setText('Level: ' + player.level);
	// Shuriken spawning logic
	shurikenTimer++;
	if (shurikenTimer >= 300) {
		// Every 5 seconds (60fps * 5)
		spawnShuriken();
		shurikenTimer = 0;
	}
	// Enemy spawning logic
	enemySpawnTimer++;
	var spawnRate = Math.max(300 - waveNumber * 10, 60); // Faster spawns as waves progress
	if (enemySpawnTimer >= spawnRate) {
		spawnEnemy();
		enemySpawnTimer = 0;
	}
	// Wave progression
	if (Math.floor(gameTime) % 30 === 0 && Math.floor(gameTime) > 0 && Math.floor(gameTime / 30) > waveNumber - 1) {
		waveNumber++;
		waveText.setText('Wave: ' + waveNumber);
		spawnEnemyWave(5 + waveNumber);
	}
};
// Helper functions
function spawnShuriken() {
	for (var i = 0; i < (player.level > 5 ? 2 : 1); i++) {
		var shuriken = new Shuriken();
		shuriken.x = player.x;
		shuriken.y = player.y;
		// Choose a random enemy to target, or random direction if no enemies
		if (enemies.length > 0) {
			var targetEnemy = enemies[Math.floor(Math.random() * enemies.length)];
			var dx = targetEnemy.x - player.x;
			var dy = targetEnemy.y - player.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance > 0) {
				shuriken.direction = {
					x: dx / distance,
					y: dy / distance
				};
			} else {
				// Random direction if enemy is directly on top of player
				var angle = Math.random() * Math.PI * 2;
				shuriken.direction = {
					x: Math.cos(angle),
					y: Math.sin(angle)
				};
			}
		} else {
			// Random direction if no enemies
			var angle = Math.random() * Math.PI * 2;
			shuriken.direction = {
				x: Math.cos(angle),
				y: Math.sin(angle)
			};
		}
		game.addChild(shuriken);
		shurikens.push(shuriken);
		LK.getSound('throw').play();
	}
}
function spawnEnemy() {
	var enemy = new Enemy();
	// Scale enemy stats with wave number
	enemy.health = 20 + waveNumber * 5;
	enemy.speed = 2 + waveNumber * 0.1;
	enemy.damage = 10 + waveNumber * 1;
	enemy.experienceValue = 1 + Math.floor(waveNumber / 3);
	// Spawn outside the screen
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			enemy.x = Math.random() * 2048;
			enemy.y = -100;
			break;
		case 1:
			// Right
			enemy.x = 2148;
			enemy.y = Math.random() * 2732;
			break;
		case 2:
			// Bottom
			enemy.x = Math.random() * 2048;
			enemy.y = 2832;
			break;
		case 3:
			// Left
			enemy.x = -100;
			enemy.y = Math.random() * 2732;
			break;
	}
	game.addChild(enemy);
	enemies.push(enemy);
}
function spawnEnemyWave(count) {
	for (var i = 0; i < count; i++) {
		spawnEnemy();
	}
}

===================================================================
--- original.js
+++ change.js
@@ -50,10 +50,23 @@
 		}
 	};
 	self.takeDamage = function (amount) {
 		self.health -= amount;
-		// Flash red when damaged
-		LK.effects.flashObject(enemyGraphic, 0xFFFFFF, 100);
+		// Flash white when damaged
+		tween(enemyGraphic, {
+			tint: 0xFFFFFF
+		}, {
+			duration: 50,
+			easing: tween.easeOut,
+			onFinish: function onFinish() {
+				tween(enemyGraphic, {
+					tint: 0xff2222 // Return to original enemy color
+				}, {
+					duration: 50,
+					easing: tween.easeIn
+				});
+			}
+		});
 		// Create explosion effect
 		var explosion = new Explosion();
 		explosion.x = self.x;
 		explosion.y = self.y;