/**** 
* Classes
****/ 
// AntivirusAgent class: player-controlled agent
var AntivirusAgent = Container.expand(function () {
	var self = Container.call(this);
	// Attach agent asset (placeholder: 'antivirusAgent')
	var agentAsset = self.attachAsset('antivirusAgent', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Track last position for event triggers
	self.lastX = 0;
	self.lastY = 0;
	// Update method stub
	self.update = function () {
		// To be implemented: movement, collision, etc.
	};
	return self;
});
// SystemFile class: files to protect from infection
var SystemFile = Container.expand(function () {
	var self = Container.call(this);
	// Attach file asset (placeholder: 'systemFile')
	var fileAsset = self.attachAsset('systemFile', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Infection state
	self.infected = false;
	return self;
});
// Virus class: viruses that move toward system files
var Virus = Container.expand(function () {
	var self = Container.call(this);
	// Attach virus asset (placeholder: 'virus')
	var virusAsset = self.attachAsset('virus', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Track last position for event triggers
	self.lastX = 0;
	self.lastY = 0;
	// Update method: move toward nearest uninfected SystemFile and infect on contact
	self.update = function () {
		// Find nearest uninfected system file
		var nearestFile = null;
		var minDist = Infinity;
		for (var i = 0; i < systemFiles.length; i++) {
			var file = systemFiles[i];
			if (file.infected) continue;
			var dx = file.x - self.x;
			var dy = file.y - self.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < minDist) {
				minDist = dist;
				nearestFile = file;
			}
		}
		// Move toward nearest file if found
		if (nearestFile) {
			var dx = nearestFile.x - self.x;
			var dy = nearestFile.y - self.y;
			var len = Math.sqrt(dx * dx + dy * dy);
			if (len > 0) {
				var speed = 16;
				// Speed up if this virus or all viruses are boosted
				if (self.speedBoost || Virus.prototype.speedBoosted) {
					speed = 28;
				}
				self.x += dx / len * speed;
				self.y += dy / len * speed;
			}
			// Check for infection (collision)
			if (!self.lastWasIntersecting && self.intersects(nearestFile)) {
				nearestFile.infected = true;
				// Optionally: visually indicate infection (e.g. alpha)
				if (nearestFile.children && nearestFile.children.length > 0) {
					nearestFile.children[0].alpha = 0.4;
				}
			}
			self.lastWasIntersecting = self.intersects(nearestFile);
		}
		// Track last position for event triggers
		self.lastX = self.x;
		self.lastY = self.y;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Global arrays to keep track of all viruses and system files
var viruses = [];
var systemFiles = [];
// Create the antivirus agent and add to the game
var antivirusAgent = new AntivirusAgent();
game.addChild(antivirusAgent);
antivirusAgent.x = 2048 / 2;
antivirusAgent.y = 2732 - 300; // Start near the bottom center
// Add system files along the bottom of the screen
var numFiles = 5;
var spacing = 2048 / (numFiles + 1);
for (var i = 0; i < numFiles; i++) {
	var file = new SystemFile();
	file.x = spacing * (i + 1);
	file.y = 2732 - 100;
	game.addChild(file);
	systemFiles.push(file);
}
// Function to spawn a virus at a random X at the top
function spawnVirus() {
	var virus = new Virus();
	virus.x = 200 + Math.random() * (2048 - 400);
	virus.y = 100;
	game.addChild(virus);
	viruses.push(virus);
}
// Spawn viruses at intervals instead of all at once
var numViruses = 5;
var virusesSpawned = 0;
var virusSpawnTimer = LK.setInterval(function () {
	if (virusesSpawned < numViruses) {
		spawnVirus();
		virusesSpawned++;
	} else {
		LK.clearInterval(virusSpawnTimer);
	}
}, 1200); // spawn every 1.2 seconds
// Dragging logic for antivirus agent
var draggingAgent = false;
game.down = function (x, y, obj) {
	// Start dragging if touch/click is near the agent
	var dx = x - antivirusAgent.x;
	var dy = y - antivirusAgent.y;
	var dist = Math.sqrt(dx * dx + dy * dy);
	if (dist < 120) {
		// touch radius
		draggingAgent = true;
	}
};
game.move = function (x, y, obj) {
	if (draggingAgent) {
		antivirusAgent.x = x;
		antivirusAgent.y = y;
	}
};
game.up = function (x, y, obj) {
	draggingAgent = false;
};
// Score variable and display
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Main game update loop
game.update = function () {
	// Update all viruses and check for collision with antivirus agent
	for (var i = viruses.length - 1; i >= 0; i--) {
		var virus = viruses[i];
		if (virus.update) virus.update();
		// Check for collision with antivirus agent (eliminate virus)
		if (!virus.lastAgentIntersect && virus.intersects(antivirusAgent)) {
			// Remove virus from game
			virus.destroy();
			viruses.splice(i, 1);
			// Play virus sound
			LK.getSound('virus').play();
			// Increase score and update display
			score += 1;
			scoreTxt.setText(score);
			// When score reaches 5, spawn 5 more viruses (if not already triggered)
			if (score === 5 && typeof moreVirusesSpawned === "undefined") {
				moreVirusesSpawned = true;
				var extraViruses = 5;
				var extraSpawned = 0;
				var extraVirusTimer = LK.setInterval(function () {
					if (extraSpawned < extraViruses) {
						spawnVirus();
						extraSpawned++;
					} else {
						LK.clearInterval(extraVirusTimer);
					}
				}, 1000);
			}
			// When score reaches 10, spawn 8 more viruses and speed up all viruses (only once)
			if (score === 10 && typeof evenMoreVirusesSpawned === "undefined") {
				evenMoreVirusesSpawned = true;
				var moreViruses = 8;
				var moreSpawned = 0;
				var moreVirusTimer = LK.setInterval(function () {
					if (moreSpawned < moreViruses) {
						spawnVirus();
						moreSpawned++;
					} else {
						LK.clearInterval(moreVirusTimer);
					}
				}, 600); // faster spawn interval
				// Speed up all existing viruses and future ones
				for (var v = 0; v < viruses.length; v++) {
					viruses[v].speedBoost = true;
				}
				Virus.prototype.speedBoosted = true;
			}
			continue;
		}
		// When score reaches 15, spawn 10 more viruses and speed up all viruses (only once)
		if (score === 15 && typeof maxVirusWaveSpawned === "undefined") {
			maxVirusWaveSpawned = true;
			var maxViruses = 10;
			var maxSpawned = 0;
			var maxVirusTimer = LK.setInterval(function () {
				if (maxSpawned < maxViruses) {
					spawnVirus();
					maxSpawned++;
				} else {
					LK.clearInterval(maxVirusTimer);
				}
			}, 400); // even faster spawn interval
			// Speed up all existing viruses and future ones
			for (var v = 0; v < viruses.length; v++) {
				viruses[v].speedBoost = true;
			}
			Virus.prototype.speedBoosted = true;
		}
		// When score reaches 20, spawn 12 more viruses and speed up all viruses (only once)
		if (score === 20 && typeof ultraVirusWaveSpawned === "undefined") {
			ultraVirusWaveSpawned = true;
			var ultraViruses = 12;
			var ultraSpawned = 0;
			var ultraVirusTimer = LK.setInterval(function () {
				if (ultraSpawned < ultraViruses) {
					spawnVirus();
					ultraSpawned++;
				} else {
					LK.clearInterval(ultraVirusTimer);
				}
			}, 250); // even faster spawn interval
			// Speed up all existing viruses and future ones
			for (var v = 0; v < viruses.length; v++) {
				viruses[v].speedBoost = true;
			}
			Virus.prototype.speedBoosted = true;
		}
		virus.lastAgentIntersect = virus.intersects(antivirusAgent);
	}
	// Update antivirus agent
	if (antivirusAgent.update) antivirusAgent.update();
	// End game if too many files are infected
	var infectedCount = 0;
	for (var i = 0; i < systemFiles.length; i++) {
		if (systemFiles[i].infected) infectedCount++;
	}
	if (infectedCount >= 3) {
		LK.showGameOver();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -174,8 +174,10 @@
 		if (!virus.lastAgentIntersect && virus.intersects(antivirusAgent)) {
 			// Remove virus from game
 			virus.destroy();
 			viruses.splice(i, 1);
+			// Play virus sound
+			LK.getSound('virus').play();
 			// Increase score and update display
 			score += 1;
 			scoreTxt.setText(score);
 			// When score reaches 5, spawn 5 more viruses (if not already triggered)