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

/**** 
* Classes
****/ 
var Particle = Container.expand(function () {
	var self = Container.call(this);
	self.vx = 0;
	self.vy = 0;
	self.life = 60;
	self.maxLife = 60;
	var particleGraphics = self.attachAsset('particle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.setVelocity = function (vx, vy) {
		self.vx = vx;
		self.vy = vy;
	};
	self.setLife = function (life) {
		self.life = life;
		self.maxLife = life;
	};
	self.setColor = function (color) {
		particleGraphics.tint = color;
	};
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		self.life--;
		// Fade out over time
		particleGraphics.alpha = self.life / self.maxLife;
		// Gravity effect
		self.vy += 0.2;
		// Remove when life expires
		if (self.life <= 0) {
			self.destroy();
			var index = particles.indexOf(self);
			if (index !== -1) {
				particles.splice(index, 1);
			}
		}
	};
	return self;
});
var PathLine = Container.expand(function () {
	var self = Container.call(this);
	self.points = [];
	self.graphics = [];
	self.setPath = function (points) {
		// Clear old graphics
		for (var i = 0; i < self.graphics.length; i++) {
			self.graphics[i].destroy();
		}
		self.graphics = [];
		self.points = points;
		// Draw new path
		for (var i = 0; i < points.length - 1; i++) {
			var dist = Math.sqrt(Math.pow(points[i + 1].x - points[i].x, 2) + Math.pow(points[i + 1].y - points[i].y, 2));
			var segments = Math.floor(dist / 20);
			for (var j = 0; j < segments; j++) {
				var t = j / segments;
				var dot = self.attachAsset('path', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				dot.x = points[i].x + (points[i + 1].x - points[i].x) * t;
				dot.y = points[i].y + (points[i + 1].y - points[i].y) * t;
				dot.alpha = 0.5;
				self.graphics.push(dot);
			}
		}
	};
	self.clear = function () {
		for (var i = 0; i < self.graphics.length; i++) {
			self.graphics[i].destroy();
		}
		self.graphics = [];
		self.points = [];
	};
	return self;
});
var Tower = Container.expand(function () {
	var self = Container.call(this);
	self.owner = 0; // 0 = neutral, 1 = player, 2 = enemy
	self.unitCount = 0;
	self.maxUnits = 100;
	self.spawnRate = 30; // ticks between spawns
	self.lastSpawn = 0;
	var towerGraphics = self.attachAsset('tower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.countText = new Text2('0', {
		size: 60,
		fill: 0xFFFFFF
	});
	self.countText.anchor.set(0.5, 0.5);
	self.addChild(self.countText);
	self.setOwner = function (newOwner) {
		var oldOwner = self.owner;
		self.owner = newOwner;
		var targetColor;
		if (newOwner === 0) {
			targetColor = 0x888888; // neutral gray
		} else if (newOwner === 1) {
			targetColor = 0x4a90e2; // player blue
		} else {
			targetColor = 0xe74c3c; // enemy red
		}
		// Only animate if ownership actually changed
		if (oldOwner !== newOwner) {
			// Smooth color transition over 500ms
			tween(towerGraphics, {
				tint: targetColor
			}, {
				duration: 500,
				easing: tween.easeInOut
			});
		} else {
			// Immediate color change if no ownership change
			towerGraphics.tint = targetColor;
		}
	};
	self.addUnits = function (count) {
		self.unitCount = Math.min(self.unitCount + count, self.maxUnits);
		self.countText.setText(Math.floor(self.unitCount));
	};
	self.removeUnits = function (count) {
		self.unitCount = Math.max(0, self.unitCount - count);
		self.countText.setText(Math.floor(self.unitCount));
		return count;
	};
	self.update = function () {
		if (self.owner > 0) {
			// Calculate dynamic spawn rate based on unit count
			// More units = faster production (lower spawn rate number)
			// Base rate is 30, reduced by unit count factor
			var dynamicSpawnRate = Math.max(10, self.spawnRate - Math.floor(self.unitCount / 10));
			if (LK.ticks - self.lastSpawn > dynamicSpawnRate) {
				self.addUnits(1);
				self.lastSpawn = LK.ticks;
				// Create production particles
				var particleColor = self.owner === 1 ? 0x4a90e2 : 0xe74c3c;
				createProductionParticles(self.x, self.y, particleColor);
			}
		}
	};
	return self;
});
var Unit = Container.expand(function () {
	var self = Container.call(this);
	self.owner = 1;
	self.speed = 3;
	self.targetTower = null;
	self.pathIndex = 0;
	self.path = [];
	var unitGraphics = self.attachAsset('unit', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.setOwner = function (owner) {
		self.owner = owner;
		if (owner === 1) {
			unitGraphics.tint = 0x4a90e2; // player blue
		} else {
			unitGraphics.tint = 0xe74c3c; // enemy red
		}
	};
	self.setPath = function (path, target) {
		self.path = path;
		self.targetTower = target;
		self.pathIndex = 0;
		if (path.length > 0) {
			self.x = path[0].x;
			self.y = path[0].y;
		}
	};
	self.lastWasIntersecting = false;
	self.update = function () {
		if (!self.targetTower || self.pathIndex >= self.path.length) {
			return;
		}
		// Check for combat with enemy units
		var currentIntersecting = false;
		for (var i = 0; i < units.length; i++) {
			var otherUnit = units[i];
			if (otherUnit !== self && otherUnit.owner !== self.owner) {
				// Check if units are close enough to fight (within 30 pixels)
				var combatDx = self.x - otherUnit.x;
				var combatDy = self.y - otherUnit.y;
				var combatDist = Math.sqrt(combatDx * combatDx + combatDy * combatDy);
				if (combatDist < 30) {
					currentIntersecting = true;
					// Combat occurs - both units destroy each other
					if (!self.lastWasIntersecting) {
						// Create explosion particles at combat location
						createExplosionParticles(self.x, self.y, 0xff4444, 8);
						createExplosionParticles(otherUnit.x, otherUnit.y, 0xff4444, 8);
						// Flash both units red before destroying
						LK.effects.flashObject(self, 0xff0000, 200);
						LK.effects.flashObject(otherUnit, 0xff0000, 200);
						LK.getSound('combat').play();
						// Destroy both units after flash
						LK.setTimeout(function () {
							if (self && self.parent) {
								self.destroy();
								var selfIndex = units.indexOf(self);
								if (selfIndex !== -1) {
									units.splice(selfIndex, 1);
								}
							}
							if (otherUnit && otherUnit.parent) {
								otherUnit.destroy();
								var otherIndex = units.indexOf(otherUnit);
								if (otherIndex !== -1) {
									units.splice(otherIndex, 1);
								}
							}
						}, 200);
						return;
					}
				}
			}
		}
		self.lastWasIntersecting = currentIntersecting;
		var target = self.path[self.pathIndex];
		var dx = target.x - self.x;
		var dy = target.y - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < self.speed) {
			self.pathIndex++;
			if (self.pathIndex >= self.path.length && self.targetTower) {
				// Reached target tower
				if (self.targetTower.owner === self.owner) {
					self.targetTower.addUnits(1);
				} else {
					self.targetTower.unitCount--;
					if (self.targetTower.unitCount < 0) {
						self.targetTower.unitCount = 1;
						self.targetTower.setOwner(self.owner);
						LK.getSound('capture').play();
					}
					self.targetTower.countText.setText(Math.floor(Math.abs(self.targetTower.unitCount)));
				}
				self.destroy();
				units.splice(units.indexOf(self), 1);
			}
		} else {
			self.x += dx / dist * self.speed;
			self.y += dy / dist * self.speed;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a1a
});

/**** 
* Game Code
****/ 
var towers = [];
var units = [];
var particles = [];
var currentPath = null;
var selectedTower = null;
var isDragging = false;
var currentLevel = storage.currentLevel || 0;
var aiStartTime = null; // Track when AI should start (null = not started yet)
// Level configurations - 10 levels with progressive difficulty
var levels = [{
	// Level 1 - Tutorial
	towers: [{
		x: 300,
		y: 1366,
		owner: 1,
		units: 30
	}, {
		x: 1024,
		y: 800,
		owner: 0,
		units: 10
	}, {
		x: 1748,
		y: 1366,
		owner: 2,
		units: 20
	}]
}, {
	// Level 2 - Basic Strategy
	towers: [{
		x: 300,
		y: 400,
		owner: 1,
		units: 35
	}, {
		x: 1024,
		y: 1366,
		owner: 0,
		units: 15
	}, {
		x: 1748,
		y: 400,
		owner: 2,
		units: 25
	}, {
		x: 1748,
		y: 2332,
		owner: 2,
		units: 25
	}]
}, {
	// Level 3 - Multi-Front
	towers: [{
		x: 300,
		y: 1366,
		owner: 1,
		units: 45
	}, {
		x: 700,
		y: 800,
		owner: 0,
		units: 15
	}, {
		x: 1348,
		y: 800,
		owner: 0,
		units: 15
	}, {
		x: 700,
		y: 1932,
		owner: 0,
		units: 15
	}, {
		x: 1348,
		y: 1932,
		owner: 0,
		units: 15
	}, {
		x: 1748,
		y: 1366,
		owner: 2,
		units: 35
	}]
}, {
	// Level 4 - Defensive Challenge
	towers: [{
		x: 300,
		y: 1366,
		owner: 1,
		units: 50
	}, {
		x: 600,
		y: 600,
		owner: 0,
		units: 20
	}, {
		x: 1024,
		y: 400,
		owner: 2,
		units: 40
	}, {
		x: 1448,
		y: 600,
		owner: 0,
		units: 20
	}, {
		x: 1748,
		y: 1366,
		owner: 2,
		units: 40
	}, {
		x: 1024,
		y: 2100,
		owner: 2,
		units: 40
	}]
}, {
	// Level 5 - Resource Management
	towers: [{
		x: 200,
		y: 800,
		owner: 1,
		units: 55
	}, {
		x: 200,
		y: 1932,
		owner: 1,
		units: 55
	}, {
		x: 700,
		y: 1366,
		owner: 0,
		units: 25
	}, {
		x: 1348,
		y: 1366,
		owner: 0,
		units: 25
	}, {
		x: 1748,
		y: 600,
		owner: 2,
		units: 45
	}, {
		x: 1748,
		y: 1366,
		owner: 2,
		units: 45
	}, {
		x: 1748,
		y: 2132,
		owner: 2,
		units: 45
	}]
}, {
	// Level 6 - Territory Control
	towers: [{
		x: 300,
		y: 400,
		owner: 1,
		units: 60
	}, {
		x: 300,
		y: 2332,
		owner: 1,
		units: 60
	}, {
		x: 600,
		y: 800,
		owner: 0,
		units: 30
	}, {
		x: 1024,
		y: 1366,
		owner: 0,
		units: 30
	}, {
		x: 1448,
		y: 1932,
		owner: 0,
		units: 30
	}, {
		x: 1748,
		y: 800,
		owner: 2,
		units: 50
	}, {
		x: 1748,
		y: 1500,
		owner: 2,
		units: 50
	}, {
		x: 1748,
		y: 2200,
		owner: 2,
		units: 50
	}]
}, {
	// Level 7 - Advanced Tactics
	towers: [{
		x: 200,
		y: 1366,
		owner: 1,
		units: 65
	}, {
		x: 500,
		y: 600,
		owner: 0,
		units: 35
	}, {
		x: 500,
		y: 1366,
		owner: 0,
		units: 35
	}, {
		x: 500,
		y: 2132,
		owner: 0,
		units: 35
	}, {
		x: 1024,
		y: 400,
		owner: 0,
		units: 35
	}, {
		x: 1024,
		y: 2332,
		owner: 0,
		units: 35
	}, {
		x: 1548,
		y: 600,
		owner: 0,
		units: 35
	}, {
		x: 1548,
		y: 1366,
		owner: 0,
		units: 35
	}, {
		x: 1548,
		y: 2132,
		owner: 0,
		units: 35
	}, {
		x: 1848,
		y: 1366,
		owner: 2,
		units: 55
	}]
}, {
	// Level 8 - Siege Warfare
	towers: [{
		x: 300,
		y: 600,
		owner: 1,
		units: 70
	}, {
		x: 300,
		y: 1366,
		owner: 1,
		units: 70
	}, {
		x: 300,
		y: 2132,
		owner: 1,
		units: 70
	}, {
		x: 800,
		y: 800,
		owner: 0,
		units: 40
	}, {
		x: 800,
		y: 1932,
		owner: 0,
		units: 40
	}, {
		x: 1248,
		y: 800,
		owner: 0,
		units: 40
	}, {
		x: 1248,
		y: 1932,
		owner: 0,
		units: 40
	}, {
		x: 1650,
		y: 400,
		owner: 2,
		units: 60
	}, {
		x: 1650,
		y: 1366,
		owner: 2,
		units: 60
	}, {
		x: 1650,
		y: 2332,
		owner: 2,
		units: 60
	}]
}, {
	// Level 9 - Final Challenge
	towers: [{
		x: 200,
		y: 800,
		owner: 1,
		units: 75
	}, {
		x: 200,
		y: 1932,
		owner: 1,
		units: 75
	}, {
		x: 600,
		y: 400,
		owner: 0,
		units: 45
	}, {
		x: 600,
		y: 1366,
		owner: 0,
		units: 45
	}, {
		x: 600,
		y: 2332,
		owner: 0,
		units: 45
	}, {
		x: 1024,
		y: 600,
		owner: 0,
		units: 45
	}, {
		x: 1024,
		y: 2132,
		owner: 0,
		units: 45
	}, {
		x: 1448,
		y: 400,
		owner: 0,
		units: 45
	}, {
		x: 1448,
		y: 1366,
		owner: 0,
		units: 45
	}, {
		x: 1448,
		y: 2333,
		owner: 0,
		units: 45
	}, {
		x: 1748,
		y: 600,
		owner: 2,
		units: 65
	}, {
		x: 1748,
		y: 1366,
		owner: 2,
		units: 65
	}, {
		x: 1748,
		y: 2132,
		owner: 2,
		units: 65
	}]
}, {
	// Level 10 - Master's Trial
	towers: [{
		x: 150,
		y: 1366,
		owner: 1,
		units: 80
	}, {
		x: 400,
		y: 600,
		owner: 0,
		units: 50
	}, {
		x: 400,
		y: 1100,
		owner: 0,
		units: 50
	}, {
		x: 400,
		y: 1632,
		owner: 0,
		units: 50
	}, {
		x: 400,
		y: 2132,
		owner: 0,
		units: 50
	}, {
		x: 800,
		y: 400,
		owner: 0,
		units: 50
	}, {
		x: 800,
		y: 800,
		owner: 0,
		units: 50
	}, {
		x: 800,
		y: 1932,
		owner: 0,
		units: 50
	}, {
		x: 800,
		y: 2333,
		owner: 0,
		units: 50
	}, {
		x: 1248,
		y: 400,
		owner: 0,
		units: 50
	}, {
		x: 1248,
		y: 800,
		owner: 0,
		units: 50
	}, {
		x: 1248,
		y: 1932,
		owner: 0,
		units: 50
	}, {
		x: 1248,
		y: 2333,
		owner: 0,
		units: 50
	}, {
		x: 1648,
		y: 600,
		owner: 0,
		units: 50
	}, {
		x: 1648,
		y: 1100,
		owner: 0,
		units: 50
	}, {
		x: 1648,
		y: 1632,
		owner: 0,
		units: 50
	}, {
		x: 1648,
		y: 2132,
		owner: 0,
		units: 50
	}, {
		x: 1898,
		y: 1366,
		owner: 2,
		units: 70
	}]
}];
// UI Elements
var levelText = new Text2('Level ' + (currentLevel + 1), {
	size: 80,
	fill: 0xFFFFFF
});
levelText.anchor.set(0.5, 0);
LK.gui.top.addChild(levelText);
function loadLevel(levelIndex) {
	// Clear existing game objects
	for (var i = 0; i < towers.length; i++) {
		towers[i].destroy();
	}
	for (var i = 0; i < units.length; i++) {
		units[i].destroy();
	}
	for (var i = 0; i < particles.length; i++) {
		particles[i].destroy();
	}
	towers = [];
	units = [];
	particles = [];
	if (currentPath) {
		currentPath.destroy();
		currentPath = null;
	}
	// Reset game state variables
	selectedTower = null;
	isDragging = false;
	// Load new level
	var levelData = levels[levelIndex % levels.length];
	for (var i = 0; i < levelData.towers.length; i++) {
		var towerData = levelData.towers[i];
		var tower = new Tower();
		tower.x = towerData.x;
		tower.y = towerData.y;
		tower.setOwner(towerData.owner);
		tower.addUnits(towerData.units);
		towers.push(tower);
		game.addChild(tower);
	}
	levelText.setText('Level ' + (levelIndex + 1));
	// Set AI to start after 5 seconds (5000ms)
	aiStartTime = LK.ticks + 5 * 60; // 5 seconds at 60 FPS
}
function createExplosionParticles(x, y, color, count) {
	for (var i = 0; i < count; i++) {
		var particle = new Particle();
		particle.x = x;
		particle.y = y;
		particle.setColor(color);
		particle.setLife(30 + Math.random() * 30);
		// Random explosion velocity
		var angle = Math.random() * Math.PI * 2;
		var speed = 2 + Math.random() * 4;
		particle.setVelocity(Math.cos(angle) * speed, Math.sin(angle) * speed - 2);
		particles.push(particle);
		game.addChild(particle);
	}
}
function createProductionParticles(x, y, color) {
	for (var i = 0; i < 3; i++) {
		var particle = new Particle();
		particle.x = x + (Math.random() - 0.5) * 60;
		particle.y = y + (Math.random() - 0.5) * 60;
		particle.setColor(color);
		particle.setLife(20 + Math.random() * 20);
		// Upward floating motion
		particle.setVelocity((Math.random() - 0.5) * 2, -1 - Math.random() * 2);
		particles.push(particle);
		game.addChild(particle);
	}
}
function createPath(start, end) {
	var points = [];
	var steps = 20;
	for (var i = 0; i <= steps; i++) {
		points.push({
			x: start.x + (end.x - start.x) * (i / steps),
			y: start.y + (end.y - start.y) * (i / steps)
		});
	}
	return points;
}
function sendUnits(fromTower, toTower, count) {
	var path = createPath(fromTower, toTower);
	var unitsToSend = Math.min(count, fromTower.unitCount);
	for (var i = 0; i < unitsToSend; i++) {
		var unit = new Unit();
		unit.setOwner(fromTower.owner);
		unit.setPath(path, toTower);
		units.push(unit);
		game.addChild(unit);
		// Stagger unit spawning
		tween(unit, {
			x: path[0].x,
			y: path[0].y
		}, {
			duration: i * 50,
			onFinish: function onFinish() {
				LK.getSound('deploy').play();
			}
		});
	}
	fromTower.removeUnits(unitsToSend);
}
function checkWinCondition() {
	var playerTowers = 0;
	var enemyTowers = 0;
	for (var i = 0; i < towers.length; i++) {
		if (towers[i].owner === 1) playerTowers++;
		if (towers[i].owner === 2) enemyTowers++;
	}
	if (enemyTowers === 0) {
		// Win condition
		currentLevel++;
		storage.currentLevel = currentLevel;
		LK.showYouWin();
	} else if (playerTowers === 0) {
		// Lose condition - reset everything to start from beginning
		currentLevel = 0;
		storage.currentLevel = 0;
		LK.showGameOver();
	}
}
// Simple AI
function runAI() {
	// Don't run AI until 5 seconds have passed
	if (aiStartTime && LK.ticks < aiStartTime) {
		return;
	}
	for (var i = 0; i < towers.length; i++) {
		var tower = towers[i];
		if (tower.owner === 2 && tower.unitCount > 15) {
			// Find nearest non-enemy tower
			var nearestTower = null;
			var nearestDist = Infinity;
			for (var j = 0; j < towers.length; j++) {
				if (towers[j].owner !== 2) {
					var dx = towers[j].x - tower.x;
					var dy = towers[j].y - tower.y;
					var dist = Math.sqrt(dx * dx + dy * dy);
					if (dist < nearestDist) {
						nearestDist = dist;
						nearestTower = towers[j];
					}
				}
			}
			if (nearestTower) {
				sendUnits(tower, nearestTower, Math.floor(tower.unitCount * 0.8));
			}
		}
	}
}
game.down = function (x, y, obj) {
	// Find if we clicked on a player tower
	for (var i = 0; i < towers.length; i++) {
		var tower = towers[i];
		if (tower.owner === 1 && Math.abs(tower.x - x) < 75 && Math.abs(tower.y - y) < 75) {
			selectedTower = tower;
			isDragging = true;
			if (!currentPath) {
				currentPath = new PathLine();
				game.addChild(currentPath);
			}
			currentPath.setPath([{
				x: tower.x,
				y: tower.y
			}]);
			break;
		}
	}
};
game.move = function (x, y, obj) {
	if (isDragging && selectedTower && currentPath) {
		currentPath.setPath([{
			x: selectedTower.x,
			y: selectedTower.y
		}, {
			x: x,
			y: y
		}]);
	}
};
game.up = function (x, y, obj) {
	if (isDragging && selectedTower) {
		// Find target tower
		var targetTower = null;
		for (var i = 0; i < towers.length; i++) {
			var tower = towers[i];
			if (tower !== selectedTower && Math.abs(tower.x - x) < 75 && Math.abs(tower.y - y) < 75) {
				targetTower = tower;
				break;
			}
		}
		if (targetTower && selectedTower.unitCount > 0) {
			sendUnits(selectedTower, targetTower, Math.floor(selectedTower.unitCount * 0.8));
		}
		if (currentPath) {
			currentPath.clear();
		}
	}
	isDragging = false;
	selectedTower = null;
};
game.update = function () {
	// Update all units
	for (var i = units.length - 1; i >= 0; i--) {
		if (!units[i] || !units[i].parent) {
			units.splice(i, 1);
		}
	}
	// Update all particles
	for (var i = particles.length - 1; i >= 0; i--) {
		if (!particles[i] || !particles[i].parent) {
			particles.splice(i, 1);
		}
	}
	// Run AI every 2 seconds
	if (LK.ticks % 120 === 0) {
		runAI();
	}
	// Check win/lose conditions
	if (LK.ticks % 60 === 0) {
		checkWinCondition();
	}
};
// Create Reset button
var resetButton = new Text2('Reset', {
	size: 60,
	fill: 0xFFFFFF
});
resetButton.anchor.set(1, 1); // Anchor to bottom right
LK.gui.bottomRight.addChild(resetButton);
// Reset button functionality
resetButton.down = function (x, y, obj) {
	// Reset all game state
	currentLevel = 0;
	storage.currentLevel = 0;
	// Clear existing game objects
	for (var i = 0; i < towers.length; i++) {
		towers[i].destroy();
	}
	for (var i = 0; i < units.length; i++) {
		units[i].destroy();
	}
	for (var i = 0; i < particles.length; i++) {
		particles[i].destroy();
	}
	towers = [];
	units = [];
	particles = [];
	if (currentPath) {
		currentPath.destroy();
		currentPath = null;
	}
	// Reset game state variables
	selectedTower = null;
	isDragging = false;
	aiStartTime = null;
	// Load first level
	loadLevel(currentLevel);
};
// Initialize first level
loadLevel(currentLevel);
// Play background music
LK.playMusic('battle');
;

===================================================================
--- original.js
+++ change.js
@@ -6,8 +6,48 @@
 
 /**** 
 * Classes
 ****/ 
+var Particle = Container.expand(function () {
+	var self = Container.call(this);
+	self.vx = 0;
+	self.vy = 0;
+	self.life = 60;
+	self.maxLife = 60;
+	var particleGraphics = self.attachAsset('particle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.setVelocity = function (vx, vy) {
+		self.vx = vx;
+		self.vy = vy;
+	};
+	self.setLife = function (life) {
+		self.life = life;
+		self.maxLife = life;
+	};
+	self.setColor = function (color) {
+		particleGraphics.tint = color;
+	};
+	self.update = function () {
+		self.x += self.vx;
+		self.y += self.vy;
+		self.life--;
+		// Fade out over time
+		particleGraphics.alpha = self.life / self.maxLife;
+		// Gravity effect
+		self.vy += 0.2;
+		// Remove when life expires
+		if (self.life <= 0) {
+			self.destroy();
+			var index = particles.indexOf(self);
+			if (index !== -1) {
+				particles.splice(index, 1);
+			}
+		}
+	};
+	return self;
+});
 var PathLine = Container.expand(function () {
 	var self = Container.call(this);
 	self.points = [];
 	self.graphics = [];
@@ -103,8 +143,11 @@
 			var dynamicSpawnRate = Math.max(10, self.spawnRate - Math.floor(self.unitCount / 10));
 			if (LK.ticks - self.lastSpawn > dynamicSpawnRate) {
 				self.addUnits(1);
 				self.lastSpawn = LK.ticks;
+				// Create production particles
+				var particleColor = self.owner === 1 ? 0x4a90e2 : 0xe74c3c;
+				createProductionParticles(self.x, self.y, particleColor);
 			}
 		}
 	};
 	return self;
@@ -154,8 +197,11 @@
 				if (combatDist < 30) {
 					currentIntersecting = true;
 					// Combat occurs - both units destroy each other
 					if (!self.lastWasIntersecting) {
+						// Create explosion particles at combat location
+						createExplosionParticles(self.x, self.y, 0xff4444, 8);
+						createExplosionParticles(otherUnit.x, otherUnit.y, 0xff4444, 8);
 						// Flash both units red before destroying
 						LK.effects.flashObject(self, 0xff0000, 200);
 						LK.effects.flashObject(otherUnit, 0xff0000, 200);
 						LK.getSound('combat').play();
@@ -223,8 +269,9 @@
 * Game Code
 ****/ 
 var towers = [];
 var units = [];
+var particles = [];
 var currentPath = null;
 var selectedTower = null;
 var isDragging = false;
 var currentLevel = storage.currentLevel || 0;
@@ -700,10 +747,14 @@
 	}
 	for (var i = 0; i < units.length; i++) {
 		units[i].destroy();
 	}
+	for (var i = 0; i < particles.length; i++) {
+		particles[i].destroy();
+	}
 	towers = [];
 	units = [];
+	particles = [];
 	if (currentPath) {
 		currentPath.destroy();
 		currentPath = null;
 	}
@@ -725,8 +776,36 @@
 	levelText.setText('Level ' + (levelIndex + 1));
 	// Set AI to start after 5 seconds (5000ms)
 	aiStartTime = LK.ticks + 5 * 60; // 5 seconds at 60 FPS
 }
+function createExplosionParticles(x, y, color, count) {
+	for (var i = 0; i < count; i++) {
+		var particle = new Particle();
+		particle.x = x;
+		particle.y = y;
+		particle.setColor(color);
+		particle.setLife(30 + Math.random() * 30);
+		// Random explosion velocity
+		var angle = Math.random() * Math.PI * 2;
+		var speed = 2 + Math.random() * 4;
+		particle.setVelocity(Math.cos(angle) * speed, Math.sin(angle) * speed - 2);
+		particles.push(particle);
+		game.addChild(particle);
+	}
+}
+function createProductionParticles(x, y, color) {
+	for (var i = 0; i < 3; i++) {
+		var particle = new Particle();
+		particle.x = x + (Math.random() - 0.5) * 60;
+		particle.y = y + (Math.random() - 0.5) * 60;
+		particle.setColor(color);
+		particle.setLife(20 + Math.random() * 20);
+		// Upward floating motion
+		particle.setVelocity((Math.random() - 0.5) * 2, -1 - Math.random() * 2);
+		particles.push(particle);
+		game.addChild(particle);
+	}
+}
 function createPath(start, end) {
 	var points = [];
 	var steps = 20;
 	for (var i = 0; i <= steps; i++) {
@@ -864,8 +943,14 @@
 		if (!units[i] || !units[i].parent) {
 			units.splice(i, 1);
 		}
 	}
+	// Update all particles
+	for (var i = particles.length - 1; i >= 0; i--) {
+		if (!particles[i] || !particles[i].parent) {
+			particles.splice(i, 1);
+		}
+	}
 	// Run AI every 2 seconds
 	if (LK.ticks % 120 === 0) {
 		runAI();
 	}
@@ -892,10 +977,14 @@
 	}
 	for (var i = 0; i < units.length; i++) {
 		units[i].destroy();
 	}
+	for (var i = 0; i < particles.length; i++) {
+		particles[i].destroy();
+	}
 	towers = [];
 	units = [];
+	particles = [];
 	if (currentPath) {
 		currentPath.destroy();
 		currentPath = null;
 	}