/**** 
* Classes
****/ 
var ConfigContainer = Container.expand(function (config) {
	var self = Container.call(this);
	config = config || {};
	// Private variables
	var destroyCalled = false;
	// Public variables
	self.tags = {};
	self.x = config.x || 0;
	self.y = config.y || 0;
	self.rotation = config.rotation || 0;
	self.alpha = config.alpha !== undefined ? config.alpha : 1.0;
	if (config.scale !== undefined || config.scaleX !== undefined || config.scaleY !== undefined) {
		var scaleX = config.scaleX !== undefined ? config.scaleX : config.scale !== undefined ? config.scale : 1;
		var scaleY = config.scaleY !== undefined ? config.scaleY : config.scale !== undefined ? config.scale : 1;
		self.scale.set(scaleX, scaleY);
	}
	// Public functions
	self.callDestroy = function () {
		if (!destroyCalled) {
			destroyCalled = true;
			self.onDestroy();
			self.destroy();
		}
	};
	self.onDestroy = function () {};
	// Enable inheritance
	return self;
});
var UiCountdownTimer = ConfigContainer.expand(function (config) {
	var self = ConfigContainer.call(this, config);
	var countdown = config.countdown;
	var ticker = 60;
	var countdownTxt = self.addChild(new BorderedText('', {
		size: 80,
		anchorX: .5,
		anchorY: 0
	}));
	self.update = function () {
		if (countdown > 0 && --ticker <= 0) {
			ticker = 60;
			if (--countdown === 0) {
				countdownTxt.setFill('#AA0000');
				// TODO: Spawn boss
			}
			adjustLabel();
		}
		difficultyScale = 1 - countdown / config.countdown;
	};
	function adjustLabel() {
		var minutes = Math.floor(countdown / 60);
		var seconds = Math.abs(countdown) % 60;
		var minutesString = (minutes < 10 ? '0' : '') + minutes;
		var secondsString = (seconds < 10 ? '0' : '') + seconds;
		countdownTxt.setText(minutesString + ':' + secondsString);
	}
	adjustLabel();
	// Enable inheritance
	return self;
});
var UiBoonUpgradeButton = ConfigContainer.expand(function (config) {
	var self = ConfigContainer.call(this, config);
	var hidden = false;
	var count = 0;
	self.attachAsset('shapeEllipse', {
		width: config.size - 5,
		height: config.size - 5,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0xA0A0A0,
		alpha: 0.5
	});
	var button = self.attachAsset('uiBoonButton', {
		width: config.size,
		height: config.size,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x000000
	});
	var countTxt = self.addChild(new BorderedText('0', {
		y: config.size / 4,
		fill: config.fill,
		anchorX: .5,
		anchorY: .5
	}));
	button.on('down', function (x, y, obj) {
		obj.event = obj;
		config.callback(obj);
	});
	//self.visible = false;
	self.update = function () {
		var scaleFactor = 1 + Math.sin(LK.ticks / 10) * 0.1;
		countTxt.scale.x = scaleFactor;
		countTxt.scale.y = scaleFactor;
	};
	self.setHidden = function (newHidden) {
		hidden = newHidden;
		self.checkHidden();
	};
	self.setCount = function (newCount) {
		count = newCount;
		countTxt.setText(newCount);
		self.checkHidden();
	};
	self.checkHidden = function () {
		//self.visible = !hidden && count > 0;
	};
	// Enable inheritance
	return self;
});
var UiBoonSelection = ConfigContainer.expand(function (config) {
	var self = ConfigContainer.call(this, config);
	var availableBoons = Object.keys(config.boons).filter(function (boon) {
		return config.boons[boon] < 3;
	});
	var selectedBoons = [];
	if (availableBoons.length <= 3) {
		selectedBoons = availableBoons;
	} else {
		while (selectedBoons.length < 3 && availableBoons.length > 0) {
			var boonIndex = Math.floor(Math.random() * availableBoons.length);
			selectedBoons.push(availableBoons.splice(boonIndex, 1)[0]);
		}
	}
	if (selectedBoons.length < 3) {
		selectedBoons.push(config.type === 'Minor' ? 'Minor Heal' : 'Full Heal');
	}
	self.attachAsset('uiBoonBackground', {
		y: 50,
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(new BorderedText('Choose ' + config.count, {
		y: -220,
		size: 60,
		anchorX: .5,
		anchorY: 0
	}));
	self.addChild(new BorderedText(config.type + ' Boon' + (config.count === 1 ? '' : 's'), {
		y: -150,
		anchorX: .5,
		anchorY: 0
	}));
	for (var i = 0; i < selectedBoons.length; i++) {
		var boon = selectedBoons[i];
		var boonButton = self.attachAsset('uiBoonButton', {
			y: i * 120,
			x: -120,
			anchorX: 0.5,
			anchorY: 0.4
		});
		boonButton.boon = boon;
		boonButton.on('down', function () {
			self.destroy();
			config.callback(this.boon);
		});
		var boonLevel = self.addChild(new BorderedText(config.boons[boon] !== undefined ? config.boons[boon] : '∞', {
			x: boonButton.x,
			y: boonButton.y,
			anchor: {
				x: .5,
				y: .5
			}
		}));
		var boonName = self.addChild(new BorderedText(boon, {
			x: boonButton.x + 60,
			y: boonButton.y,
			anchorX: 0,
			anchorY: .5
		}));
	}
	// Enable inheritance
	return self;
});
var ProgressBar = ConfigContainer.expand(function (config) {
	var self = ConfigContainer.call(this, config);
	var width = config.width || 120;
	var height = config.height || 15;
	var weight = config.weight || 6;
	self.attachAsset('shapeBox', {
		width: width + 2 * weight,
		height: height + 2 * weight,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x000000
	});
	var bar = self.attachAsset('shapeBox', {
		x: -width / 2,
		width: width,
		height: height,
		anchorY: 0.5,
		tint: config.tint || 0xFFFFFF
	});
	self.updatePercentage = function (percentage) {
		bar.scale.x = Math.min(1.0, Math.max(0, percentage));
	};
	if (config.percentage !== undefined) {
		self.updatePercentage(config.percentage);
	}
	// Enable inheritance
	return self;
});
var Pickup = ConfigContainer.expand(function (config) {
	var self = ConfigContainer.call(this, config);
	self.tags[TAG_PICKUP] = true;
	self.activated = false;
	self.pickupRange = 0;
	self.update = function () {
		if (!isPaused && !self.activated) {
			var dx = hero.x - self.x;
			var dy = hero.y - self.y;
			var distanceSqr = dx * dx + dy * dy;
			if (distanceSqr <= self.pickupRange * self.pickupRange) {
				self.activated = true;
				self.onActivate();
			}
		}
	};
	self.onActivate = function () {};
	// Enable inheritance
	return self;
});
var PickupWeapon = Pickup.expand(function (config) {
	var self = Pickup.call(this, config);
	var updateBase = self.update;
	var scaleBase = self.scale;
	self.tags[TAG_WEAPON] = true;
	self.pickupRange = PICKUP_WEAPON_RANGE;
	var graphics = self.attachAsset(config.graphics, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		updateBase();
		var scaleFactor = 1 + Math.sin(LK.ticks / 10) * 0.1;
		graphics.scale.x = scaleBase.x * scaleFactor;
		graphics.scale.y = scaleBase.y * scaleFactor;
	};
	self.onActivate = function () {
		// hero.addChild(new config.weaponClass());
		for (var i = backgroundContainer.children.length - 1; i >= 0; i--) {
			var child = backgroundContainer.children[i];
			if (child.tags[TAG_PICKUP] && child.tags[TAG_WEAPON]) {
				child.callDestroy();
			}
		}
		self.callDestroy();
	};
	// Enable inheritance
	return self;
});
var PickupHealing = Pickup.expand(function (config) {
	var self = Pickup.call(this, config);
	var updateBase = self.update;
	self.attachAsset('pickupHealing', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		if (hero.health < hero.healthMax) {
			updateBase();
		}
	};
	self.onActivate = function () {
		hero.healPercentage(PICKUP_HEAL_MINOR);
	};
	self.onDestroy = function () {
		pickupHealthCount--;
	};
	pickupHealthCount++;
	// Enable inheritance
	return self;
});
var PickupCrucifix = Pickup.expand(function (config) {
	var self = Pickup.call(this, config);
	self.tags[TAG_CRUCIFIX] = true;
	self.pickupRange = PICKUP_CRUCIFIX_RANGE;
	self.attachAsset('pickupCrucifix', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.onActivate = function () {
		for (var i = midBackContainer.children.length - 1; i >= 0; i--) {
			var child = midBackContainer.children[i];
			if (child.tags[TAG_ENEMY]) {
				child.callDestroy();
			}
		}
		for (var i = midFrontContainer.children.length - 1; i >= 0; i--) {
			var child = midFrontContainer.children[i];
			if (child.tags[TAG_ENEMY]) {
				child.callDestroy();
			}
		}
		for (var i = backgroundContainer.children.length - 1; i >= 0; i--) {
			var child = backgroundContainer.children[i];
			if (child.tags[TAG_PICKUP] && child.tags[TAG_EXPERIENCE]) {
				child.callActivate();
			}
		}
	};
	self.onDestroy = function () {
		pickupCrucifixCount--;
	};
	pickupCrucifixCount++;
	// Enable inheritance
	return self;
});
var JoystickKnob = ConfigContainer.expand(function (config) {
	var self = ConfigContainer.call(this, config);
	self.attachAsset('shapeEllipse', {
		width: config.size,
		height: config.size,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x808080,
		alpha: 0.5
	});
	self.attachAsset('joystickKnob', {
		width: config.size * 0.65,
		height: config.size * 0.65,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x000000
	});
	self.attachAsset('outlineSmall', {
		width: config.size + 5,
		height: config.size + 5,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x000000
	});
	// Enable inheritance
	return self;
});
var Joystick = ConfigContainer.expand(function (config) {
	var self = ConfigContainer.call(this, config);
	var size = config.size || 100;
	var maxDistance = size / 2;
	var base = self.attachAsset('shapeEllipse', {
		width: size,
		height: size,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0xA0A0A0,
		alpha: 0.5
	});
	self.attachAsset('outlineLarge', {
		width: size + 5,
		height: size + 5,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x000000
	});
	var knob = self.addChild(new JoystickKnob({
		size: size / 2
	}));
	var pressed = false;
	self.magnitude = 0;
	self.direction = undefined;
	self.down = function (x, y, obj) {
		if (x === 0 && y === 0) {
			self.magnitude = 0;
			self.direction = undefined;
		} else {
			var distance = Math.sqrt(x * x + y * y);
			if (distance <= size / 2) {
				pressed = true;
				knob.x = x;
				knob.y = y;
				self.magnitude = distance / maxDistance;
				self.direction = Math.atan2(y, x);
			}
		}
	};
	self.movement = function (x, y, obj) {
		if (pressed) {
			if (x === 0 && y === 0) {
				self.magnitude = 0;
				self.direction = undefined;
			} else {
				var distance = Math.sqrt(x * x + y * y);
				var direction = Math.atan2(y, x);
				if (distance > maxDistance) {
					x = Math.cos(direction) * maxDistance;
					y = Math.sin(direction) * maxDistance;
					distance = maxDistance;
				}
				knob.x = x;
				knob.y = y;
				self.magnitude = distance / maxDistance;
				self.direction = direction;
			}
		}
	};
	self.release = function (x, y, obj) {
		pressed = false;
		self.magnitude = 0;
		self.direction = undefined;
		knob.x = 0;
		knob.y = 0;
	};
	// Enable inheritance
	return self;
});
var Hero = ConfigContainer.expand(function (config) {
	var self = ConfigContainer.call(this, config);
	// Private variables
	var level = 1;
	var experience = 0;
	var levelRequirement = HERO_XP_REQUIRED;
	// Public variables
	self.speed = HERO_SPEED_BASE;
	self.healthMax = HERO_HEALTH_BASE;
	self.health = self.healthMax;
	// Graphics
	self.attachAsset('shapeEllipse', {
		width: 150,
		height: 15,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x000000,
		alpha: 0.75
	});
	var heroGraphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	var experienceBar = self.addChild(new ProgressBar({
		y: -heroGraphics.height - 25,
		percentage: 0.01
	}));
	var healthBar = self.addChild(new ProgressBar({
		y: -heroGraphics.height - 35,
		tint: HERO_COLOUR
	}));
	var levelTxt = self.addChild(new BorderedText('1', {
		y: -heroGraphics.height - 30,
		anchorX: 0.5,
		anchorY: 0.5,
		size: 65
	}));
	// Public functions
	self.update = function () {
		if (!isPaused && joystick.direction !== undefined) {
			var speedX = Math.cos(joystick.direction) * joystick.magnitude * self.speed;
			var speedY = Math.sin(joystick.direction) * joystick.magnitude * self.speed;
			self.x += speedX;
			self.y += speedY;
			if (self.x < HERO_BORDER) {
				self.x = HERO_BORDER;
			} else if (self.x > GAME_WIDTH - HERO_BORDER) {
				self.x = GAME_WIDTH - HERO_BORDER;
			}
			if (self.y < HERO_BORDER) {
				self.y = HERO_BORDER;
			} else if (self.y > GAME_HEIGHT - HERO_BORDER) {
				self.y = GAME_HEIGHT - HERO_BORDER;
			}
			heroGraphics.scale.x = speedX < 0 ? -1 : 1;
		}
	};
	self.addExperience = function (amount) {
		experience += amount;
		if (experience >= levelRequirement) {
			level++;
			experience -= levelRequirement;
			levelRequirement = Math.floor(levelRequirement * 1.2);
			// onLevelUp(level);
		}
		experienceBar.setPercentage(experience / levelRequirement);
	};
	self.takeDamage = function (amount) {
		self.health = Math.max(0, self.health - amount);
		healthBar.updatePercentage(self.health / self.healthMax);
		if (self.collision) {
			LK.effects.flashObject(self.collision, 0xAA0000, 1000);
		}
		if (self.health <= 0) {
			LK.effects.flashScreen(0xAA0000, 1000);
			LK.showGameOver();
		}
	};
	self.healPercentage = function (percentage) {
		if (percentage > 0) {
			self.health = Math.min(self.healthMax, self.health + self.healthMax * percentage);
			LK.effects.flashObject(self.collision, HERO_COLOUR, 1000);
		}
		healthBar.updatePercentage(self.health / self.healthMax);
	};
	// Enable inheritance
	return self;
});
var Enemy = ConfigContainer.expand(function (config) {
	var self = ConfigContainer.call(this, config);
	// Private variables
	var damageTaken = 0;
	var cooldown = 0;
	// Public variables
	self.healthBar;
	self.health = 0;
	self.healthOffset = 0;
	self.speed = 0;
	self.fleeRange = 0;
	self.attackRange = 0;
	self.attackCooldown = 0;
	self.animationAlpha = 0;
	self.xpDropBase = 0;
	self.xpDropChance = 0;
	// Public functions
	self.update = function () {
		if (!isPaused) {
			self.animationAlpha++;
			var state = ENEMY_STATE_MOVE;
			var dx = hero.x - self.x;
			var dy = hero.y - self.y;
			var distanceSqr = dx * dx + dy * dy;
			if (checkBounds(self.x, self.y, ENEMY_BORDER)) {
				if (self.fleeRange > 0 && distanceSqr < self.fleeRange * self.fleeRange) {
					state = ENEMY_STATE_FLEE;
				} else if (self.attackRange > 0 && distanceSqr <= self.attackRange * self.attackRange) {
					state = ENEMY_STATE_ATTACK;
				}
			}
			var stateValues = self.adjustState(state, {
				cooldownAdjustment: 0,
				speedFactor: 0,
				canAttack: false
			});
			// Perform the movement
			if (stateValues.speedFactor !== 0) {
				var distance = Math.sqrt(distanceSqr);
				self.x += dx / distance * self.speed * stateValues.speedFactor;
				self.y += dy / distance * self.speed * stateValues.speedFactor;
			}
			// Perform the attack if it is ready
			cooldown += stateValues.cooldownAdjustment;
			if (stateValues.canAttack && cooldown <= 0) {
				cooldown = self.attackCooldown;
				self.onAttack();
			}
			// Adjust the owner parent based on the position
			var newParent = self.y <= hero.y ? midBackContainer : midFrontContainer;
			if (self.parent !== newParent) {
				newParent.addChild(self);
			}
			self.onUpdate();
		}
	};
	self.adjustState = function (state, stateValues) {
		switch (state) {
			case ENEMY_STATE_MOVE:
				stateValues.speedFactor = 1;
				break;
			case ENEMY_STATE_FLEE:
				stateValues.cooldownAdjustment = self.attackCooldown - cooldown;
				stateValues.speedFactor = -1;
				break;
			case ENEMY_STATE_ATTACK:
				stateValues.cooldownAdjustment = -1;
				stateValues.canAttack = true;
				break;
		}
		return stateValues;
	};
	self.takeDamage = function (amount) {
		damageTaken += amount;
		if (damageTaken >= self.health) {
			self.callDestroy();
		}
		if (!healthBar) {
			healthBar = self.addChild(new ProgressBar({
				y: self.healthOffset,
				tint: ENEMY_COLOUR
			}));
		}
		healthBar.updatePercentage(Math.max(0, 1 - damageTaken / self.health));
		LK.effects.flashObject(self.graphics, ENEMY_COLOUR, 1000);
	};
	self.onDestroy = function () {
		dropExperience();
		enemyCount--;
		foregroundContainer.addChild(new EffectEnemyDeath({
			x: self.x,
			y: self.y
		}));
	};
	self.onUpdate = function () {};
	self.onAttack = function () {};
	// Private functions
	function dropExperience() {
		var amount = self.xpDropBase;
		if (self.xpDropChance > 0) {
			for (var i = 0; i <= minorBoonLevels['Luck']; i++) {
				if (Math.random() < self.xpDropChance) {
					amount++;
				}
			}
		}
		if (amount > 0) {
			backgroundContainer.addChild(new PickupExperience({
				x: self.x + ENEMY_XP_RANGE * (1 - 2 * Math.random()),
				y: self.y + ENEMY_XP_RANGE * (1 - 2 * Math.random()),
				experience: amount
			}));
		}
	}
	enemyCount++;
	// Enable inheritance
	return self;
});
var EnemyRanged = Enemy.expand(function (config) {
	var self = Enemy.call(this, config);
	var adjustStateBase = self.adjustState;
	// Public variables
	self.speed = ENEMY_RANGED_SPEED;
	self.fleeRange = self.attackRange * ENEMY_RANGED_FLEE_DISTANCE_FACTOR;
	self.health = ENEMY_RANGED_HEALTH_BASE + ENEMY_RANGED_HEALTH_SCALE * difficultyScale;
	self.healthOffset = ENEMY_RANGED_HEALTH_OFFSET;
	self.attackRange = ENEMY_RANGED_RANGE_MIN * ENEMY_RANGED_RANGE_VAR * Math.random();
	self.attackCooldown = ENEMY_RANGED_ATTACK_COOLDOWN;
	self.xpDropBase = ENEMY_RANGED_XP_DROP_BASE;
	self.xpDropChance = ENEMY_RANGED_XP_DROP_CHANCE;
	self.graphics = self.attachAsset('enemyRanged', {
		y: ENEMY_RANGED_GRAPHICS_OFFSET,
		anchorX: 0.6,
		anchorY: 0.5
	});
	// Public functions
	self.adjustState = function (state, stateValues) {
		var newStateValues = adjustStateBase(state, stateValues);
		switch (state) {
			case ENEMY_STATE_MOVE:
				newStateValues.cooldownAdjustment += ENEMY_RANGED_MOVE_COOLDOWN_ADJUSTMENT;
				break;
			case ENEMY_STATE_FLEE:
				stateValues.speedFactor *= ENEMY_RANGED_FLEE_SPEED_FACTOR;
				break;
		}
		return newStateValues;
	};
	self.onAttack = function () {
		LK.effects.flashObject(self.graphics, 0x000000, 500);
		self.parent.addChild(new ProjectileEnemy({
			x: graphics.x,
			y: graphics.y,
			direction: Math.atan2(dy, dx),
			damage: ENEMY_RANGED_ATTACK_DAMAGE
		}));
	};
	self.onUpdate = function () {
		// Scale the enemy up and down
		var newScale = 1 + Math.sin(self.animationAlpha / ENEMY_RANGED_SCALE_PERIOD) * ENEMY_RANGED_SCALE_MAGNITUDE;
		self.graphics.scale.x = newScale;
		self.graphics.scale.y = newScale;
	};
	// Enable inheritance
	return self;
});
var EnemyBasic = Enemy.expand(function (config) {
	var self = Enemy.call(this, config);
	var onDestroyBase = self.onDestroy;
	// Public variables
	self.speed = ENEMY_BASIC_SPEED;
	self.health = ENEMY_BASIC_HEALTH_BASE + ENEMY_BASIC_HEALTH_SCALE * difficultyScale;
	self.attackRange = ENEMY_BASIC_ATTACK_RANGE;
	self.attackCooldown = ENEMY_BASIC_ATTACK_COOLDOWN;
	self.xpDropChance = ENEMY_BASIC_XP_DROP_CHANCE;
	self.attachAsset('shapeEllipse', {
		width: 100,
		height: 10,
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x000000,
		alpha: 0.75
	});
	self.graphics = self.attachAsset('enemyBasic', {
		y: ENEMY_BASIC_GRAPHICS_OFFSET,
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Public functions
	self.onUpdate = function () {
		// Bob the enemy up and down
		self.graphics.y = ENEMY_BASIC_GRAPHICS_OFFSET + ENEMY_BASIC_BOB_MAGNITUDE * Math.sin(self.animationAlpha / ENEMY_BASIC_BOB_PERIOD);
		if (self.healthBar) {
			self.healthOffset = self.graphics.y + ENEMY_BASIC_HEALTH_OFFSET;
			self.healthBar.y = self.healthOffset;
		}
	};
	self.onAttack = function () {
		hero.takeDamage(ENEMY_BASIC_ATTACK_DAMAGE);
	};
	self.onDestroy = function () {
		onDestroyBase();
		if (pickupCrucifixCount < PICKUP_CRUCIFIX_COUNT && Math.random() < Math.sqrt(minorBoonLevels['Luck']) / 100) {
			backgroundContainer.addChild(new PickupCrucifix({
				x: self.x,
				y: self.y
			}));
		} else if (pickupHealthCount < PICKUP_HEALTH_COUNT) {
			for (var k = 0; k <= 1 + minorBoonLevels['Luck']; k++) {
				if (Math.random() < PICKUP_HEALTH_CHANCE) {
					backgroundContainer.addChild(new PickupHealing({
						x: self.x,
						y: self.y
					}));
					break;
				}
			}
		}
	};
	// Enable inheritance
	return self;
});
/**
* config {
* 	x        : Number || 0, // See: ConfigContainer
* 	y        : Number || 0, // See: ConfigContainer
* 	rotation : Number || 0, // See: ConfigContainer
* 	anchorX  : Number || 0,
* 	anchorY  : Number || 1,
* 	size     : Number || TEXT_DEFAULT_SIZE,
* 	weight   : Number || TEXT_DEFAULT_WEIGHT,
* 	font     : String || TEXT_DEFAULT_FONT,
* 	fill     : String || TEXT_DEFAULT_FILL,
* 	border   : String || TEXT_DEFAULT_BORDER,
* }
**/
var BorderedText = ConfigContainer.expand(function (text, config) {
	var self = ConfigContainer.call(this, config);
	config = config || {};
	;
	var anchorX = config.anchorX !== undefined ? config.anchorX : 0;
	var anchorY = config.anchorY !== undefined ? config.anchorY : 1;
	var size = config.size !== undefined ? config.size : TEXT_DEFAULT_SIZE;
	var weight = config.weight !== undefined ? config.weight : TEXT_DEFAULT_WEIGHT;
	var font = config.font !== undefined ? config.font : TEXT_DEFAULT_FONT;
	var textFill = config.fill !== undefined ? config.fill : TEXT_DEFAULT_FILL;
	var borderFill = config.border !== undefined ? config.border : TEXT_DEFAULT_BORDER;
	var textAssets = [];
	var mainAsset;
	;
	self.setText = setText;
	self.setFill = setFill;
	;
	function setText(newText) {
		for (var i = 0; i < textAssets.length; i++) {
			textAssets[i].setText(newText);
		}
	}
	function setFill(newFill) {
		textFill = newFill;
		mainAsset.fill = newFill;
	}
	function buildTextAssets(newText) {
		for (var i = 0; i < TEXT_OFFSETS.length; i++) {
			var main = i === TEXT_OFFSETS.length - 1;
			var fill = main ? textFill : borderFill;
			var textAsset = textAssets[i];
			if (textAsset) {
				textAsset.destroy();
			}
			textAsset = self.addChild(new Text2(newText, {
				fill: fill,
				font: font,
				size: size
			}));
			textAsset.anchor = {
				x: anchorX,
				y: anchorY
			}; // NOTE: Cannot be set in config
			textAsset.x = TEXT_OFFSETS[i][0] * weight; // NOTE: Cannot be set in config
			textAsset.y = TEXT_OFFSETS[i][1] * weight; // NOTE: Cannot be set in config
			textAssets[i] = textAsset;
		}
		mainAsset = textAssets[TEXT_OFFSETS.length - 1];
	}
	;
	buildTextAssets(text);
	// Enable inheritance
	return self;
});
var EnemySpawner = Container.expand(function () {
	var self = Container.call(this);
	var borderedWidth = GAME_WIDTH - 2 * ENEMY_BORDER_SPAWN;
	var borderedHeight = GAME_HEIGHT - 2 * ENEMY_BORDER_SPAWN;
	var spawnTimer = ENEMY_SPAWN_DELAY;
	self.update = function () {
		if (enemyCount < ENEMY_LIMIT && --spawnTimer <= 0) {
			spawnTimer = Math.max(ENEMY_SPAWN_RATE_MIN, ENEMY_SPAWN_RATE_BASE - Math.floor(ENEMY_SPAWN_RATE_SCALE * difficultyScale));
			var isRanged = difficultyScale >= ENEMY_RANGED_DIFFICULTY && Math.random() < Math.min(ENEMY_RANGED_SPAWN_CHANCE_MIN, ENEMY_RANGED_SPAWN_CHANCE_FACTOR * difficultyScale);
			var enemyClass = isRanged ? EnemyRanged : EnemyBasic;
			self.spawnClass(enemyClass);
		}
	};
	self.spawnClass = function (enemyClass) {
		var spawnX, spawnY;
		var side = Math.floor(Math.random() * 4);
		var distance = Math.random();
		switch (side) {
			case 0:
				spawnX = borderedWidth * distance;
				spawnY = ENEMY_BORDER_SPAWN;
				break;
			case 1:
				spawnX = GAME_WIDTH - ENEMY_BORDER_SPAWN;
				spawnY = borderedHeight * distance;
				break;
			case 2:
				spawnX = borderedWidth * distance;
				spawnY = GAME_HEIGHT - ENEMY_BORDER_SPAWN;
				break;
			case 3:
				spawnX = ENEMY_BORDER_SPAWN;
				spawnY = borderedHeight * distance;
				break;
		}
		midFrontContainer.addChild(new enemyClass({
			x: spawnX,
			y: spawnY
		}));
	};
});
var SortingContainer = Container.expand(function () {
	var self = Container.call(this);
	self.update = function () {
		self.children.sort(function (a, b) {
			return a.y - b.y;
		});
	};
	// Enable inheritance
	return self;
});

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

/**** 
* Game Code
****/ 
;
//==============================================================================
// Global constants & settings
//==============================================================================
;
// Math constants / pre-calculations
var MATH_2_PI = Math.PI * 2;
var MATH_HALF_PI = Math.PI / 2;
var MATH_QUARTER_PI = Math.PI / 4;
var MATH_HALF_ROOT_3 = Math.sqrt(3) / 2; // Required by: TEXT_OFFSETS, BorderedText, BorderedSymbol, BorderedShape, SymbolText
var MATH_APPROX_ZERO = 0.0000001;
;
// Text settings
var TEXT_OFFSETS = [[0, 1], [MATH_HALF_ROOT_3, 0.5], [MATH_HALF_ROOT_3, -0.5], [0, -1], [-MATH_HALF_ROOT_3, -0.5], [-MATH_HALF_ROOT_3, 0.5], [0, 0]]; // Required by: BorderedText, BorderedSymbol, BorderedShape, SymbolText
var TEXT_DEFAULT_WEIGHT = 4; // Required by: BorderedText, BorderedSymbol, BorderedShape, SymbolText
var TEXT_DEFAULT_BORDER = '#000000'; // Required by: BorderedText, BorderedSymbol, BorderedShape, SymbolText
var TEXT_DEFAULT_FILL = '#FFFFFF'; // Required by: BorderedText, SymbolText
var TEXT_DEFAULT_FONT = 'Consolas'; // Required by: BorderedText, SymbolText
var TEXT_DEFAULT_SIZE = 50; // Required by: BorderedText, SymbolText
;
// Game constants
var GAME_TICKS = 60;
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
;
// Tags
var TAG_ENEMY = 'Enemy';
var TAG_PROJECTILE = 'Projectile';
var TAG_PICKUP = 'Pickup';
var TAG_EXPERIENCE = 'Experience';
var TAG_CRUCIFIX = 'Crucifix';
var TAG_WEAPON = 'Weapon';
// Hero settings
var HERO_COLOUR = 0x0FA0FF;
var HERO_BORDER = 250;
var HERO_HEALTH_BASE = 100;
var HERO_HEALTH_BONUS = 30;
var HERO_SPEED_BASE = 8;
var HERO_SPEED_BONUS = 2;
var HERO_XP_REQUIRED = 20;
var HERO_XP_SCALING = 1.2;
// Enemy settings
var ENEMY_COLOUR = 0xAA0000;
var ENEMY_BORDER = 50; // Forced minimum move distance from the edge of the screen
var ENEMY_BORDER_SPAWN = -100;
var ENEMY_SPAWN_DELAY = 2 * GAME_TICKS;
var ENEMY_SPAWN_RATE_BASE = 1 * GAME_TICKS;
var ENEMY_SPAWN_RATE_SCALE = 0.75 * GAME_TICKS;
var ENEMY_SPAWN_RATE_MIN = 0.25 * GAME_TICKS;
var ENEMY_LIMIT = 40;
var ENEMY_XP_RANGE = 50;
var ENEMY_STATE_MOVE = 'Move';
var ENEMY_STATE_FLEE = 'Flee';
var ENEMY_STATE_ATTACK = 'Attack';
var ENEMY_BASIC_SPEED = 2.5;
var ENEMY_BASIC_HEALTH_BASE = 10;
var ENEMY_BASIC_HEALTH_SCALE = 50;
var ENEMY_BASIC_HEALTH_OFFSET = 30;
var ENEMY_BASIC_ATTACK_RANGE = 100;
var ENEMY_BASIC_ATTACK_DAMAGE = 10;
var ENEMY_BASIC_ATTACK_COOLDOWN = GAME_TICKS / 6;
var ENEMY_BASIC_GRAPHICS_OFFSET = -100;
var ENEMY_BASIC_BOB_MAGNITUDE = 2;
var ENEMY_BASIC_BOB_PERIOD = 10;
var ENEMY_BASIC_XP_DROP_CHANCE = 0.3; // Per level of Luck
var ENEMY_RANGED_SPEED = 1.5;
var ENEMY_RANGED_HEALTH_BASE = 20;
var ENEMY_RANGED_HEALTH_SCALE = 60;
var ENEMY_RANGED_HEALTH_OFFSET = 20;
var ENEMY_RANGED_RANGE_MIN = 500;
var ENEMY_RANGED_RANGE_VAR = 250;
var ENEMY_RANGED_ATTACK_DAMAGE = 5;
var ENEMY_RANGED_MOVE_COOLDOWN_ADJUSTMENT = -0.5;
var ENEMY_RANGED_GRAPHICS_OFFSET = -100;
var ENEMY_RANGED_FLEE_DISTANCE_FACTOR = 0.35;
var ENEMY_RANGED_FLEE_SPEED_FACTOR = 1.5;
var ENEMY_RANGED_SCALE_PERIOD = 20;
var ENEMY_RANGED_SCALE_MAGNITUDE = 0.05;
var ENEMY_RANGED_XP_DROP_BASE = 2;
var ENEMY_RANGED_XP_DROP_CHANCE = 0.5; // Per level of Luck
var ENEMY_RANGED_DIFFICULTY = 0.2;
var ENEMY_RANGED_SPAWN_CHANCE_MIN = 0.4;
var ENEMY_RANGED_SPAWN_CHANCE_FACTOR = 0.5;
// Pickup settings
var PICKUP_HEAL_MINOR = 0.1;
var PICKUP_HEAL_MAJOR = 1.0;
var PICKUP_HEALTH_COUNT = 3;
var PICKUP_HEALTH_CHANCE = 0.02; // Per level of luck
var PICKUP_CRUCIFIX_COUNT = 1;
var PICKUP_CRUCIFIX_RANGE = 200;
var PICKUP_WEAPON_RANGE = 200;
;
//==============================================================================
// Instances & variables
//==============================================================================
;
// Variables
var isPaused = false;
var enemyCount = 0;
var minorBoonCount = 0;
var majorBoonCount = 0;
var pickupHealthCount = 0;
var pickupCrucifixCount = 0;
var difficultyScale = 0;
var startingWeapons = [];
var minorBoonLevels = {
	'Luck': 0,
	'Scale': 0,
	'Range': 0,
	'Damage': 0,
	'Rearm': 0,
	'Duration': 0,
	'Health': 0,
	'Speed': 0
};
var majorBoonLevels = {
	'Growth': 0,
	'Split': 0
};
;
// Interface instances
var upgradeButton = LK.gui.bottomRight.addChild(new UiBoonUpgradeButton({
	x: -150,
	y: -500,
	size: 125,
	callback: function callback() {
		if (minorBoonCount + majorBoonCount > 0) {
			showBoonSelection();
		}
	}
}));
var countdownTimer = LK.gui.top.addChild(new UiCountdownTimer({
	y: 20,
	countdown: 300
}));
;
// Game instances
game.addChild(new EnemySpawner());
game.attachAsset('grassTop', {
	y: HERO_BORDER - 100,
	x: GAME_WIDTH / 2,
	anchorX: 0.5
});
game.attachAsset('grassBot', {
	y: GAME_HEIGHT - HERO_BORDER + 100,
	x: GAME_WIDTH / 2,
	anchorX: 0.5,
	anchorY: 1.0
});
var backgroundContainer = game.addChild(new Container());
var midBackContainer = game.addChild(new SortingContainer());
var hero = game.addChild(new Hero({
	x: GAME_WIDTH / 2,
	y: GAME_HEIGHT / 2
}));
var midFrontContainer = game.addChild(new SortingContainer());
var foregroundContainer = game.addChild(new Container());
var joystick = game.addChild(new Joystick({
	size: 400,
	x: GAME_WIDTH - 400,
	y: GAME_HEIGHT - 400
}));
backgroundContainer.addChild(new PickupWeapon({
	x: GAME_WIDTH / 4 * 2,
	y: GAME_HEIGHT / 4,
	scale: 1.25,
	graphics: 'weaponFireball'
	// weaponClass: WeaponFireball
}));
backgroundContainer.addChild(new PickupWeapon({
	x: GAME_WIDTH / 4 * 2,
	y: GAME_HEIGHT / 4 * 3,
	scale: 1.25,
	rotation: -Math.PI / 8,
	graphics: 'weaponCross'
	// weaponClass: WeaponCross
}));
;
//==============================================================================
// Global events
//==============================================================================
;
// Add event listeners for the joystick
game.move = function (x, y, obj) {
	joystick.movement(x - joystick.x, y - joystick.y, obj);
};
game.up = function (x, y, obj) {
	joystick.release(x, y, obj);
};
;
//==============================================================================
// Global helper functions
//==============================================================================
;
function checkBounds(x, y, border) {
	return !(x < border || x > GAME_WIDTH - border || y < border || y > GAME_HEIGHT - border);
}

===================================================================
--- original.js
+++ change.js
@@ -79,9 +79,9 @@
 		anchorY: 0.5,
 		tint: 0x000000
 	});
 	var countTxt = self.addChild(new BorderedText('0', {
-		y: config.size / 3,
+		y: config.size / 4,
 		fill: config.fill,
 		anchorX: .5,
 		anchorY: .5
 	}));
@@ -428,10 +428,10 @@
 		anchorX: 0.5,
 		anchorY: 1.0
 	});
 	var experienceBar = self.addChild(new ProgressBar({
-		y: -heroGraphics.height - 25
-		// percentage: 0
+		y: -heroGraphics.height - 25,
+		percentage: 0.01
 	}));
 	var healthBar = self.addChild(new ProgressBar({
 		y: -heroGraphics.height - 35,
 		tint: HERO_COLOUR
@@ -439,9 +439,9 @@
 	var levelTxt = self.addChild(new BorderedText('1', {
 		y: -heroGraphics.height - 30,
 		anchorX: 0.5,
 		anchorY: 0.5,
-		size: 60
+		size: 65
 	}));
 	// Public functions
 	self.update = function () {
 		if (!isPaused && joystick.direction !== undefined) {
@@ -474,9 +474,11 @@
 	};
 	self.takeDamage = function (amount) {
 		self.health = Math.max(0, self.health - amount);
 		healthBar.updatePercentage(self.health / self.healthMax);
-		LK.effects.flashObject(self.collision, 0xAA0000, 1000);
+		if (self.collision) {
+			LK.effects.flashObject(self.collision, 0xAA0000, 1000);
+		}
 		if (self.health <= 0) {
 			LK.effects.flashScreen(0xAA0000, 1000);
 			LK.showGameOver();
 		}
@@ -490,8 +492,230 @@
 	};
 	// Enable inheritance
 	return self;
 });
+var Enemy = ConfigContainer.expand(function (config) {
+	var self = ConfigContainer.call(this, config);
+	// Private variables
+	var damageTaken = 0;
+	var cooldown = 0;
+	// Public variables
+	self.healthBar;
+	self.health = 0;
+	self.healthOffset = 0;
+	self.speed = 0;
+	self.fleeRange = 0;
+	self.attackRange = 0;
+	self.attackCooldown = 0;
+	self.animationAlpha = 0;
+	self.xpDropBase = 0;
+	self.xpDropChance = 0;
+	// Public functions
+	self.update = function () {
+		if (!isPaused) {
+			self.animationAlpha++;
+			var state = ENEMY_STATE_MOVE;
+			var dx = hero.x - self.x;
+			var dy = hero.y - self.y;
+			var distanceSqr = dx * dx + dy * dy;
+			if (checkBounds(self.x, self.y, ENEMY_BORDER)) {
+				if (self.fleeRange > 0 && distanceSqr < self.fleeRange * self.fleeRange) {
+					state = ENEMY_STATE_FLEE;
+				} else if (self.attackRange > 0 && distanceSqr <= self.attackRange * self.attackRange) {
+					state = ENEMY_STATE_ATTACK;
+				}
+			}
+			var stateValues = self.adjustState(state, {
+				cooldownAdjustment: 0,
+				speedFactor: 0,
+				canAttack: false
+			});
+			// Perform the movement
+			if (stateValues.speedFactor !== 0) {
+				var distance = Math.sqrt(distanceSqr);
+				self.x += dx / distance * self.speed * stateValues.speedFactor;
+				self.y += dy / distance * self.speed * stateValues.speedFactor;
+			}
+			// Perform the attack if it is ready
+			cooldown += stateValues.cooldownAdjustment;
+			if (stateValues.canAttack && cooldown <= 0) {
+				cooldown = self.attackCooldown;
+				self.onAttack();
+			}
+			// Adjust the owner parent based on the position
+			var newParent = self.y <= hero.y ? midBackContainer : midFrontContainer;
+			if (self.parent !== newParent) {
+				newParent.addChild(self);
+			}
+			self.onUpdate();
+		}
+	};
+	self.adjustState = function (state, stateValues) {
+		switch (state) {
+			case ENEMY_STATE_MOVE:
+				stateValues.speedFactor = 1;
+				break;
+			case ENEMY_STATE_FLEE:
+				stateValues.cooldownAdjustment = self.attackCooldown - cooldown;
+				stateValues.speedFactor = -1;
+				break;
+			case ENEMY_STATE_ATTACK:
+				stateValues.cooldownAdjustment = -1;
+				stateValues.canAttack = true;
+				break;
+		}
+		return stateValues;
+	};
+	self.takeDamage = function (amount) {
+		damageTaken += amount;
+		if (damageTaken >= self.health) {
+			self.callDestroy();
+		}
+		if (!healthBar) {
+			healthBar = self.addChild(new ProgressBar({
+				y: self.healthOffset,
+				tint: ENEMY_COLOUR
+			}));
+		}
+		healthBar.updatePercentage(Math.max(0, 1 - damageTaken / self.health));
+		LK.effects.flashObject(self.graphics, ENEMY_COLOUR, 1000);
+	};
+	self.onDestroy = function () {
+		dropExperience();
+		enemyCount--;
+		foregroundContainer.addChild(new EffectEnemyDeath({
+			x: self.x,
+			y: self.y
+		}));
+	};
+	self.onUpdate = function () {};
+	self.onAttack = function () {};
+	// Private functions
+	function dropExperience() {
+		var amount = self.xpDropBase;
+		if (self.xpDropChance > 0) {
+			for (var i = 0; i <= minorBoonLevels['Luck']; i++) {
+				if (Math.random() < self.xpDropChance) {
+					amount++;
+				}
+			}
+		}
+		if (amount > 0) {
+			backgroundContainer.addChild(new PickupExperience({
+				x: self.x + ENEMY_XP_RANGE * (1 - 2 * Math.random()),
+				y: self.y + ENEMY_XP_RANGE * (1 - 2 * Math.random()),
+				experience: amount
+			}));
+		}
+	}
+	enemyCount++;
+	// Enable inheritance
+	return self;
+});
+var EnemyRanged = Enemy.expand(function (config) {
+	var self = Enemy.call(this, config);
+	var adjustStateBase = self.adjustState;
+	// Public variables
+	self.speed = ENEMY_RANGED_SPEED;
+	self.fleeRange = self.attackRange * ENEMY_RANGED_FLEE_DISTANCE_FACTOR;
+	self.health = ENEMY_RANGED_HEALTH_BASE + ENEMY_RANGED_HEALTH_SCALE * difficultyScale;
+	self.healthOffset = ENEMY_RANGED_HEALTH_OFFSET;
+	self.attackRange = ENEMY_RANGED_RANGE_MIN * ENEMY_RANGED_RANGE_VAR * Math.random();
+	self.attackCooldown = ENEMY_RANGED_ATTACK_COOLDOWN;
+	self.xpDropBase = ENEMY_RANGED_XP_DROP_BASE;
+	self.xpDropChance = ENEMY_RANGED_XP_DROP_CHANCE;
+	self.graphics = self.attachAsset('enemyRanged', {
+		y: ENEMY_RANGED_GRAPHICS_OFFSET,
+		anchorX: 0.6,
+		anchorY: 0.5
+	});
+	// Public functions
+	self.adjustState = function (state, stateValues) {
+		var newStateValues = adjustStateBase(state, stateValues);
+		switch (state) {
+			case ENEMY_STATE_MOVE:
+				newStateValues.cooldownAdjustment += ENEMY_RANGED_MOVE_COOLDOWN_ADJUSTMENT;
+				break;
+			case ENEMY_STATE_FLEE:
+				stateValues.speedFactor *= ENEMY_RANGED_FLEE_SPEED_FACTOR;
+				break;
+		}
+		return newStateValues;
+	};
+	self.onAttack = function () {
+		LK.effects.flashObject(self.graphics, 0x000000, 500);
+		self.parent.addChild(new ProjectileEnemy({
+			x: graphics.x,
+			y: graphics.y,
+			direction: Math.atan2(dy, dx),
+			damage: ENEMY_RANGED_ATTACK_DAMAGE
+		}));
+	};
+	self.onUpdate = function () {
+		// Scale the enemy up and down
+		var newScale = 1 + Math.sin(self.animationAlpha / ENEMY_RANGED_SCALE_PERIOD) * ENEMY_RANGED_SCALE_MAGNITUDE;
+		self.graphics.scale.x = newScale;
+		self.graphics.scale.y = newScale;
+	};
+	// Enable inheritance
+	return self;
+});
+var EnemyBasic = Enemy.expand(function (config) {
+	var self = Enemy.call(this, config);
+	var onDestroyBase = self.onDestroy;
+	// Public variables
+	self.speed = ENEMY_BASIC_SPEED;
+	self.health = ENEMY_BASIC_HEALTH_BASE + ENEMY_BASIC_HEALTH_SCALE * difficultyScale;
+	self.attackRange = ENEMY_BASIC_ATTACK_RANGE;
+	self.attackCooldown = ENEMY_BASIC_ATTACK_COOLDOWN;
+	self.xpDropChance = ENEMY_BASIC_XP_DROP_CHANCE;
+	self.attachAsset('shapeEllipse', {
+		width: 100,
+		height: 10,
+		anchorX: 0.5,
+		anchorY: 0.5,
+		tint: 0x000000,
+		alpha: 0.75
+	});
+	self.graphics = self.attachAsset('enemyBasic', {
+		y: ENEMY_BASIC_GRAPHICS_OFFSET,
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Public functions
+	self.onUpdate = function () {
+		// Bob the enemy up and down
+		self.graphics.y = ENEMY_BASIC_GRAPHICS_OFFSET + ENEMY_BASIC_BOB_MAGNITUDE * Math.sin(self.animationAlpha / ENEMY_BASIC_BOB_PERIOD);
+		if (self.healthBar) {
+			self.healthOffset = self.graphics.y + ENEMY_BASIC_HEALTH_OFFSET;
+			self.healthBar.y = self.healthOffset;
+		}
+	};
+	self.onAttack = function () {
+		hero.takeDamage(ENEMY_BASIC_ATTACK_DAMAGE);
+	};
+	self.onDestroy = function () {
+		onDestroyBase();
+		if (pickupCrucifixCount < PICKUP_CRUCIFIX_COUNT && Math.random() < Math.sqrt(minorBoonLevels['Luck']) / 100) {
+			backgroundContainer.addChild(new PickupCrucifix({
+				x: self.x,
+				y: self.y
+			}));
+		} else if (pickupHealthCount < PICKUP_HEALTH_COUNT) {
+			for (var k = 0; k <= 1 + minorBoonLevels['Luck']; k++) {
+				if (Math.random() < PICKUP_HEALTH_CHANCE) {
+					backgroundContainer.addChild(new PickupHealing({
+						x: self.x,
+						y: self.y
+					}));
+					break;
+				}
+			}
+		}
+	};
+	// Enable inheritance
+	return self;
+});
 /**
 * config {
 * 	x        : Number || 0, // See: ConfigContainer
 * 	y        : Number || 0, // See: ConfigContainer
@@ -558,8 +782,49 @@
 	buildTextAssets(text);
 	// Enable inheritance
 	return self;
 });
+var EnemySpawner = Container.expand(function () {
+	var self = Container.call(this);
+	var borderedWidth = GAME_WIDTH - 2 * ENEMY_BORDER_SPAWN;
+	var borderedHeight = GAME_HEIGHT - 2 * ENEMY_BORDER_SPAWN;
+	var spawnTimer = ENEMY_SPAWN_DELAY;
+	self.update = function () {
+		if (enemyCount < ENEMY_LIMIT && --spawnTimer <= 0) {
+			spawnTimer = Math.max(ENEMY_SPAWN_RATE_MIN, ENEMY_SPAWN_RATE_BASE - Math.floor(ENEMY_SPAWN_RATE_SCALE * difficultyScale));
+			var isRanged = difficultyScale >= ENEMY_RANGED_DIFFICULTY && Math.random() < Math.min(ENEMY_RANGED_SPAWN_CHANCE_MIN, ENEMY_RANGED_SPAWN_CHANCE_FACTOR * difficultyScale);
+			var enemyClass = isRanged ? EnemyRanged : EnemyBasic;
+			self.spawnClass(enemyClass);
+		}
+	};
+	self.spawnClass = function (enemyClass) {
+		var spawnX, spawnY;
+		var side = Math.floor(Math.random() * 4);
+		var distance = Math.random();
+		switch (side) {
+			case 0:
+				spawnX = borderedWidth * distance;
+				spawnY = ENEMY_BORDER_SPAWN;
+				break;
+			case 1:
+				spawnX = GAME_WIDTH - ENEMY_BORDER_SPAWN;
+				spawnY = borderedHeight * distance;
+				break;
+			case 2:
+				spawnX = borderedWidth * distance;
+				spawnY = GAME_HEIGHT - ENEMY_BORDER_SPAWN;
+				break;
+			case 3:
+				spawnX = ENEMY_BORDER_SPAWN;
+				spawnY = borderedHeight * distance;
+				break;
+		}
+		midFrontContainer.addChild(new enemyClass({
+			x: spawnX,
+			y: spawnY
+		}));
+	};
+});
 var SortingContainer = Container.expand(function () {
 	var self = Container.call(this);
 	self.update = function () {
 		self.children.sort(function (a, b) {
@@ -716,8 +981,9 @@
 	countdown: 300
 }));
 ;
 // Game instances
+game.addChild(new EnemySpawner());
 game.attachAsset('grassTop', {
 	y: HERO_BORDER - 100,
 	x: GAME_WIDTH / 2,
 	anchorX: 0.5
@@ -772,9 +1038,7 @@
 //==============================================================================
 // Global helper functions
 //==============================================================================
 ;
-function checkBounds(x, y) {
-	var borderOrBorderX = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
-	var borderY = arguments.length > 3 ? arguments[3] : undefined;
-	return x < borderOrBorderX || x > 2048 - borderOrBorderX || y < (borderY || borderOrBorderX) || y > 2732 - (borderY || borderOrBorderX);
+function checkBounds(x, y, border) {
+	return !(x < border || x > GAME_WIDTH - border || y < border || y > GAME_HEIGHT - border);
 }
\ No newline at end of file