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

/**** 
* Classes
****/ 
/**** 
* CLASSES
****/ 
/** Cluster – spawns multiple ore objects.
****/ 
var Cluster = Container.expand(function (type) {
	var self = Container.call(this);
	self.type = type;
	self.oreList = [];
	// Set low zIndex so clusters (and ores) remain behind UI menus
	self.zIndex = 0;
	var centerX = 100 + Math.random() * (2048 - 200);
	var centerY = 100 + Math.random() * (2732 - 200);
	self.x = centerX;
	self.y = centerY;
	var cc = gameState.clusterConfig;
	var count = randomInt(cc.min, cc.max);
	for (var i = 0; i < count; i++) {
		var ore = new Ore(type, self);
		ore.x = (Math.random() - 0.5) * 120;
		ore.y = (Math.random() - 0.5) * 120;
		self.oreList.push(ore);
		self.addChild(ore);
	}
	// Only remove the cluster when all ores are destroyed
	self.notifyOreDestroyed = function (ore) {
		var idx = self.oreList.indexOf(ore);
		if (idx >= 0) {
			self.oreList.splice(idx, 1);
		}
		ore.destroy();
		if (self.oreList.length === 0) {
			if (self.parent) {
				self.parent.removeChild(self);
			}
			var cidx = clusters.indexOf(self);
			if (cidx >= 0) {
				clusters.splice(cidx, 1);
			}
			gameState.clusterCount[type]--;
			var finalDelay = gameState.respawnTime;
			if (type === 'coal') {
				finalDelay *= 2;
			}
			LK.setTimeout(function () {
				maybeSpawnCluster(type);
			}, finalDelay);
		}
	};
	return self;
});
/** Drone – moves and zaps ores.
* Now with an increased AOE range (150) and added spinning effect.
* Also, when a drone damages an ore, it spawns a plasma–ring effect.
****/ 
var Drone = Container.expand(function () {
	var self = Container.call(this);
	self.droneSprite = LK.getAsset('drone_asset', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(self.droneSprite);
	// Increase AOE range from 100 to 150
	self.AOE_RANGE = 150;
	self.droneDamage = 2;
	self.COOLDOWN_MAX = 60;
	self.cooldown = 0;
	var SPEED = 8,
		MIN_X = 50,
		MAX_X = 2000,
		MIN_Y = 50,
		MAX_Y = 2682;
	self.vx = Math.random() < 0.5 ? SPEED : -SPEED;
	self.vy = Math.random() < 0.5 ? SPEED : -SPEED;
	// Update drone movement and add spinning effect
	self.updateDrone = function () {
		self.x += self.vx;
		self.y += self.vy;
		if (self.x < MIN_X || self.x > MAX_X) {
			self.vx = -self.vx;
		}
		if (self.y < MIN_Y || self.y > MAX_Y) {
			self.vy = -self.vy;
		}
		// Slight random deviation
		if (Math.random() < 0.01) {
			self.vx += (Math.random() - 0.5) * 2;
			self.vy += (Math.random() - 0.5) * 2;
			var speed = Math.sqrt(self.vx * self.vx + self.vy * self.vy);
			if (speed > SPEED) {
				self.vx = self.vx / speed * SPEED;
				self.vy = self.vy / speed * SPEED;
			}
		}
		// Spinning effect:
		self.droneSprite.rotation += 0.1;
		if (self.cooldown > 0) {
			self.cooldown--;
		} else {
			self.tryZap();
		}
	};
	// Drone zap: now for each ore in range, apply partial damage with reward and spawn an AOE effect.
	self.tryZap = function () {
		var hitSomething = false;
		clusters.forEach(function (cluster) {
			cluster.oreList.forEach(function (ore) {
				if (ore.health > 0) {
					var oreGlobalX = cluster.x + ore.x,
						oreGlobalY = cluster.y + ore.y;
					var dx = self.x - oreGlobalX,
						dy = self.y - oreGlobalY;
					var dist = Math.sqrt(dx * dx + dy * dy);
					if (dist < self.AOE_RANGE) {
						var damage = self.droneDamage;
						var actualDamage = Math.min(damage, ore.health);
						var fraction = actualDamage / ore.maxHealth;
						var reward = fraction * ore.getValue();
						if (ore.awardedMoney + reward > ore.getValue()) {
							reward = ore.getValue() - ore.awardedMoney;
						}
						ore.awardedMoney += reward;
						gameState.money += reward;
						updateUI();
						ore.health -= actualDamage;
						hitSomething = true;
						spawnDroneAOE(ore);
						if (ore.health <= 0) {
							ore.cluster.notifyOreDestroyed(ore);
							spawnMiningParticles(ore, 5);
						} else {
							spawnMiningParticles(ore, 2);
						}
					}
				}
			});
		});
		if (hitSomething) {
			LK.getSound('drone_shot').play();
			self.cooldown = self.COOLDOWN_MAX;
		}
	};
	return self;
});
/** Miner – moves toward and mines the nearest ore.
* Now uses partial reward logic so that every hit awards money proportional to the percentage of the ore’s total value lost.
* (Also note: the miner’s swing speed has been slowed by default – its miningRate is 60 instead of 30.)
****/ 
var Miner = Container.expand(function () {
	var self = Container.call(this);
	self.attachAsset('miner', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.currentTarget = null;
	self.miningRange = 25;
	self.miningCooldown = 0;
	self.miningRate = 60; // Slower default swing speed
	self.miningDamage = 1;
	// Save originals for hyper mode
	self.originalMiningRate = self.miningRate;
	self.originalMiningDamage = self.miningDamage;
	// Boost and mode variables
	self.speedBoostMultiplier = 1;
	self.speedBoostTimer = 0;
	self.soulEmberStacks = 0;
	self.quantumPathActive = false;
	self.quantumPath = [];
	self.quantumShardValueBonus = false;
	self.hyperMiningActive = false;
	self.hyperMiningTimer = 0;
	self.activateHyperMining = function () {
		self.hyperMiningActive = true;
		self.hyperMiningTimer = 10 * 60;
		self.miningDamage *= 2;
		self.miningRate = Math.max(1, Math.floor(self.miningRate / 2));
	};
	self.findNewTarget = function () {
		if (self.quantumPathActive && self.quantumPath.length > 0) {
			self.currentTarget = self.quantumPath[0];
			if (!self.currentTarget || self.currentTarget.health <= 0) {
				self.quantumPath.shift();
				if (self.quantumPath.length === 0) {
					self.quantumShardValueBonus = false;
					self.quantumPathActive = false;
					self.currentTarget = null;
				}
				return;
			}
			return;
		}
		var validOre = [];
		clusters.forEach(function (c) {
			c.oreList.forEach(function (ore) {
				if (ore.health > 0 && ore.tier <= gameState.currentTier) {
					validOre.push(ore);
				}
			});
		});
		if (validOre.length === 0) {
			self.currentTarget = null;
			return;
		}
		self.currentTarget = validOre.sort(function (a, b) {
			var aX = a.parent.x + a.x,
				aY = a.parent.y + a.y;
			var bX = b.parent.x + b.x,
				bY = b.parent.y + b.y;
			return Math.hypot(aX - self.x, aY - self.y) - Math.hypot(bX - self.x, bY - self.y);
		})[0];
	};
	self.update = function () {
		if (self.hyperMiningActive) {
			self.hyperMiningTimer--;
			if (self.hyperMiningTimer <= 0) {
				self.miningDamage = self.originalMiningDamage;
				self.miningRate = self.originalMiningRate;
				self.hyperMiningActive = false;
			}
		}
		if (self.speedBoostTimer > 0) {
			self.speedBoostTimer--;
			if (self.speedBoostTimer <= 0) {
				self.speedBoostMultiplier = 1;
			}
		}
		self.findNewTarget();
		if (self.currentTarget) {
			var tx = self.currentTarget.parent.x + self.currentTarget.x,
				ty = self.currentTarget.parent.y + self.currentTarget.y;
			var dx = tx - self.x,
				dy = ty - self.y,
				dist = Math.sqrt(dx * dx + dy * dy);
			var finalSpeed = self.speed * self.speedBoostMultiplier;
			if (dist > self.miningRange) {
				self.x += dx / dist * finalSpeed;
				self.y += dy / dist * finalSpeed;
			} else {
				self.mineOre(self.currentTarget);
			}
		} else {
			if (typeof LK.time !== 'undefined') {
				self.y += Math.sin(LK.time.elapsed / 250) * 0.5;
			}
		}
	};
	// Modified mineOre: now every hit (automated by the miner) awards partial money.
	self.mineOre = function (ore) {
		if (self.miningCooldown > 0) {
			self.miningCooldown--;
			return;
		}
		var damageDealt = self.miningDamage * gameState.pickaxeLevel * (gameState.pickaxeBaseMultiplier || 1);
		var actualDamage = Math.min(damageDealt, ore.health);
		var fraction = actualDamage / ore.maxHealth;
		var reward = fraction * ore.getValue();
		if (ore.awardedMoney + reward > ore.getValue()) {
			reward = ore.getValue() - ore.awardedMoney;
		}
		ore.awardedMoney += reward;
		gameState.money += reward;
		updateUI();
		ore.health -= actualDamage;
		self.miningCooldown = self.miningRate;
		var mineSound = LK.getSound('mine_' + ore.type);
		if (mineSound) {
			mineSound.play();
		}
		if (ore.health <= 0) {
			spawnMiningParticles(ore, 5);
			var destroySound = LK.getSound('ore_destroy_' + ore.type);
			if (destroySound) {
				destroySound.play();
			}
			if (ore.type === "explosive" && ore.explode) {
				ore.explode();
			}
			ore.cluster.notifyOreDestroyed(ore);
		} else {
			spawnMiningParticles(ore, 2);
		}
	};
	self.applyChronostoneBoost = function () {
		self.speedBoostMultiplier *= 3;
		self.speedBoostTimer = 30 * 60;
	};
	self.applySoulEmberBoost = function () {
		if (gameState.money >= 1e6) {
			var drain = gameState.money * 0.10;
			gameState.money -= drain;
			self.soulEmberStacks = 10;
			updateUI();
		}
	};
	self.triggerQuantumShardMode = function () {
		self.quantumShardValueBonus = true;
		self.quantumPathActive = true;
		self.quantumPath = [];
		game.pauseForQuantumSelection();
	};
	return self;
});
/** Ore – represents a single ore.
* Now set to be interactive and to award partial money on every hit.
****/ 
var Ore = Container.expand(function (type, cluster) {
	var self = Container.call(this);
	self.type = type;
	self.cluster = cluster;
	// Set low zIndex so that ores remain behind the upgrade menu
	self.zIndex = 0;
	var typeList = ['coal', 'iron', 'gold', 'diamond', 'sapphire', 'emerald', 'ruby'];
	if (typeList.indexOf(type) >= 0) {
		self.tier = typeList.indexOf(type) + 1;
	} else {
		self.tier = 999;
	}
	self.baseValue = oreData[type].baseValue;
	self.maxHealth = oreData[type].baseHealth;
	self.health = self.maxHealth;
	// Attach the ore asset
	self.attachAsset(oreData[type].assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Health bar for ore
	self.healthBar = LK.getAsset('rectangle', {
		width: 120,
		height: 20,
		fill: 0x00FF00,
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.healthBar.x = 0;
	self.healthBar.y = -70;
	self.addChild(self.healthBar);
	// Track how much money has been awarded so far
	self.awardedMoney = 0;
	self.lastTapTime = 0;
	// Make ore interactive so that clicks/taps trigger the down handler.
	self.interactive = true;
	// When the player taps/clicks the ore, apply damage and award partial money.
	self.down = function () {
		var currentTime = LK.time.elapsed;
		// Minimal cooldown (~1 ms)
		if (currentTime - self.lastTapTime < 1) {
			return;
		}
		self.lastTapTime = currentTime;
		var damage = gameState.tapDamage;
		var actualDamage = Math.min(damage, self.health);
		var fraction = actualDamage / self.maxHealth;
		var reward = fraction * self.getValue();
		if (self.awardedMoney + reward > self.getValue()) {
			reward = self.getValue() - self.awardedMoney;
		}
		self.awardedMoney += reward;
		gameState.money += reward;
		updateUI();
		self.health -= actualDamage;
		spawnMiningParticles(self, 2);
		if (self.health <= 0) {
			self.cluster.notifyOreDestroyed(self);
		}
	};
	// Special pulsing glow for certain ores.
	if (["chronostone", "soulember", "quantumshard"].indexOf(type) >= 0) {
		var _pulseGlow = function pulseGlow() {
			tween(glow, {
				alpha: 1
			}, {
				duration: 1000,
				onFinish: function onFinish() {
					tween(glow, {
						alpha: 0.5
					}, {
						duration: 1000,
						onFinish: _pulseGlow
					});
				}
			});
		};
		var glow = LK.getAsset('glowing_line_asset', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		glow.alpha = 0.5;
		self.addChildAt(glow, 0);
		_pulseGlow();
	}
	if (type === "explosive") {
		self.explode = function () {
			var explosionRadius = 100;
			clusters.forEach(function (cluster) {
				cluster.oreList.forEach(function (otherOre) {
					if (otherOre !== self && otherOre.health > 0) {
						var oreGlobalX = cluster.x + otherOre.x;
						var oreGlobalY = cluster.y + otherOre.y;
						var dx = self.parent.x + self.x - oreGlobalX;
						var dy = self.parent.y + self.y - oreGlobalY;
						var dist = Math.sqrt(dx * dx + dy * dy);
						if (dist < explosionRadius) {
							otherOre.health -= 50;
							if (otherOre.health <= 0) {
								var baseValue = otherOre.getValue();
								gameState.money += baseValue;
								updateUI();
								otherOre.cluster.notifyOreDestroyed(otherOre);
								spawnMiningParticles(otherOre, 5);
							} else {
								spawnMiningParticles(otherOre, 2);
							}
						}
					}
				});
			});
			screenShake(500, 10);
		};
	}
	self.getValue = function () {
		return self.baseValue * gameState.oreMultipliers[self.type];
	};
	return self;
});

/**** 
* Initialize Game
****/ 
/**** 
* GAME INITIALIZATION & HELPER FUNCTIONS
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a1a
});

/**** 
* Game Code
****/ 
// New assets for popups, prestige main button, drone AOE effect:
/**** 
* Helper Functions
****/ 
function hideUpgradeDesc() {
	// Placeholder for hiding upgrade description UI elements if needed
}
function randomInt(min, max) {
	return Math.floor(Math.random() * (max - min + 1)) + min;
}
// Spawn mining particles – set low zIndex so they remain behind menus.
function spawnMiningParticles(ore, num) {
	for (var i = 0; i < num; i++) {
		var p = LK.getAsset('mining_particle', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		if (ore.parent) {
			p.x = ore.parent.x + ore.x;
			p.y = ore.parent.y + ore.y;
		} else {
			p.x = ore.x;
			p.y = ore.y;
		}
		if (["chronostone", "soulember", "quantumshard"].indexOf(ore.type) >= 0) {
			p.tint = oreData[ore.type].color || 0xffffff;
		}
		p.vx = (Math.random() - 0.5) * 10;
		p.vy = (Math.random() - 0.5) * 10;
		p.alpha = 1;
		// Set particles behind UI
		p.zIndex = -1;
		tween(p, {
			alpha: 0,
			y: p.y - 50
		}, {
			duration: 1000,
			onFinish: function onFinish() {
				p.destroy();
			}
		});
		game.addChild(p);
	}
}
// Interpolate between two colors (used for health bars)
function interpolateColor(c1, c2, f) {
	var r1 = c1 >> 16 & 0xFF,
		g1 = c1 >> 8 & 0xFF,
		b1 = c1 & 0xFF;
	var r2 = c2 >> 16 & 0xFF,
		g2 = c2 >> 8 & 0xFF,
		b2 = c2 & 0xFF;
	var r = Math.round(r1 + f * (r2 - r1));
	var g = Math.round(g1 + f * (g2 - g1));
	var b = Math.round(b1 + f * (b2 - b1));
	return r << 16 | g << 8 | b;
}
// Simple screen shake effect (for explosions)
function screenShake(duration, magnitude) {
	var originalX = game.x,
		originalY = game.y;
	var shakeInterval = 50;
	var elapsed = 0;
	var shake = setInterval(function () {
		elapsed += shakeInterval;
		game.x = originalX + (Math.random() - 0.5) * magnitude;
		game.y = originalY + (Math.random() - 0.5) * magnitude;
		if (elapsed >= duration) {
			clearInterval(shake);
			game.x = originalX;
			game.y = originalY;
		}
	}, shakeInterval);
}
// Spawn a drone AOE effect (a plasma–ring that fades out)
function spawnDroneAOE(ore) {
	var effect = LK.getAsset('drone_aoe_effect', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	if (ore.parent) {
		effect.x = ore.parent.x + ore.x;
		effect.y = ore.parent.y + ore.y;
	} else {
		effect.x = ore.x;
		effect.y = ore.y;
	}
	effect.alpha = 1;
	// Set its zIndex so it appears above ores but below the upgrade menu
	effect.zIndex = 1;
	game.addChild(effect);
	tween(effect, {
		alpha: 0
	}, {
		duration: 500,
		onFinish: function onFinish() {
			effect.destroy();
			game.sortChildren();
		}
	});
}
/**** 
* ACHIEVEMENT SYSTEM
****/ 
var achievements = [{
	id: 'first_mine',
	name: 'First Mine',
	description: 'Mine your first ore',
	achieved: false,
	condition: function condition() {
		return gameState.money > 0;
	}
}, {
	id: 'rich_miner',
	name: 'Rich Miner',
	description: 'Earn 1 Billion money',
	achieved: false,
	condition: function condition() {
		return gameState.money >= 1e9;
	}
}];
/**** 
* ORE DATA
****/ 
var oreData = {
	coal: {
		baseValue: 5,
		baseHealth: 10,
		assetId: 'coal_ore'
	},
	iron: {
		baseValue: 500,
		baseHealth: 100,
		assetId: 'iron_ore'
	},
	gold: {
		baseValue: 10000,
		baseHealth: 500,
		assetId: 'gold_ore'
	},
	diamond: {
		baseValue: 25000,
		baseHealth: 1000,
		assetId: 'diamond_ore'
	},
	sapphire: {
		baseValue: 100000,
		baseHealth: 2000,
		assetId: 'sapphire_ore'
	},
	emerald: {
		baseValue: 500000,
		baseHealth: 5000,
		assetId: 'emerald_ore'
	},
	ruby: {
		baseValue: 1000000,
		baseHealth: 10000,
		assetId: 'ruby_ore'
	},
	chronostone: {
		baseValue: 2000000,
		baseHealth: 2000,
		assetId: 'chronostone_ore',
		color: 0xc997d8
	},
	soulember: {
		baseValue: 5000000,
		baseHealth: 5000,
		assetId: 'soulember_ore',
		color: 0xdef3e5
	},
	quantumshard: {
		baseValue: 10000000,
		baseHealth: 10000,
		assetId: 'quantumshard_ore',
		color: 0xa1bb12
	}
};
/**** 
* GAME STATE
****/ 
var gameState = {
	money: 0,
	pickaxeLevel: 1,
	pickaxeBaseMultiplier: 1,
	droneLevel: 0,
	currentTier: 1,
	oreMultipliers: {
		coal: 1,
		iron: 1,
		gold: 1,
		diamond: 1,
		sapphire: 1,
		emerald: 1,
		ruby: 1,
		chronostone: 1,
		soulember: 1,
		quantumshard: 1
	},
	respawnTime: 3000,
	maxClustersPerType: 3,
	clusterCount: {
		coal: 0,
		iron: 0,
		gold: 0,
		diamond: 0,
		sapphire: 0,
		emerald: 0,
		ruby: 0,
		chronostone: 0,
		soulember: 0,
		quantumshard: 0
	},
	clusterConfigLevels: [{
		min: 2,
		max: 3
	}, {
		min: 3,
		max: 4
	}, {
		min: 4,
		max: 5
	}, {
		min: 5,
		max: 6
	}, {
		min: 6,
		max: 7
	}, {
		min: 6,
		max: 8
	}],
	clusterUpgradeTier: 0,
	get clusterConfig() {
		return this.clusterConfigLevels[this.clusterUpgradeTier] || {
			min: 2,
			max: 3
		};
	},
	prestigeCount: 0,
	prestigeCurrency: 0,
	tapDamage: 1
};
/**** 
* PRESTIGE & BACKGROUND HELPERS
****/ 
function getPrestigeRequirement() {
	return 1e9 * Math.pow(2, gameState.prestigeCount);
}
function canPrestige() {
	return gameState.money >= getPrestigeRequirement();
}
function calculatePrestigeShards() {
	return 1;
}
function doPrestige() {
	// Remove all clusters
	for (var i = clusters.length - 1; i >= 0; i--) {
		var c = clusters[i];
		c.removeChildren();
		if (c.parent) {
			c.parent.removeChild(c);
		}
		clusters.splice(i, 1);
	}
	// Reset drone objects & sprites
	droneObjects.forEach(function (d) {
		if (d.parent) {
			d.parent.removeChild(d);
		}
	});
	droneObjects = [];
	droneSprites.forEach(function (ds) {
		if (ds.parent) {
			ds.parent.removeChild(ds);
		}
	});
	droneSprites = [];
	// Increase prestige currency/count
	var shards = calculatePrestigeShards();
	gameState.prestigeCurrency += shards;
	gameState.prestigeCount++;
	gameState.money = 0;
	gameState.currentTier = 1;
	for (var key in gameState.clusterCount) {
		gameState.clusterCount[key] = 0;
	}
	// Reset upgrades (all except prestige upgrades persist)
	resetUpgrades();
	// Reset drones to 0
	gameState.droneLevel = 0;
	handleBackgroundTransition();
	initialSpawn();
	updateUI();
}
// Resets general, ore, and drone upgrades (and relevant gameState values) to default.
function resetUpgrades() {
	gameState.oreMultipliers = {
		coal: 1,
		iron: 1,
		gold: 1,
		diamond: 1,
		sapphire: 1,
		emerald: 1,
		ruby: 1,
		chronostone: 1,
		soulember: 1,
		quantumshard: 1
	};
	gameState.pickaxeLevel = 1;
	gameState.pickaxeBaseMultiplier = 1;
	gameState.tapDamage = 1;
	gameState.respawnTime = 3000;
	gameState.clusterUpgradeTier = 0;
	// Reset ore upgrades
	for (var key in oreUpgrades) {
		oreUpgrades[key].forEach(function (upg) {
			if (upg.initCost === undefined) {
				upg.initCost = upg.cost;
			}
			upg.cost = upg.initCost;
			upg.level = 0;
			upg.purchased = false;
		});
	}
	// Reset general upgrades
	generalUpgrades.forEach(function (upg) {
		if (upg.initCost === undefined) {
			upg.initCost = upg.cost;
		}
		upg.cost = upg.initCost;
		upg.level = 0;
		upg.purchased = false;
	});
	// Reset drone upgrades
	droneUpgrades.forEach(function (upg) {
		if (upg.initCost === undefined) {
			upg.initCost = upg.cost;
		}
		upg.cost = upg.initCost;
		upg.level = 0;
		upg.purchased = false;
	});
}
/**** 
* PRESTIGE & BACKGROUND HELPERS (continued)
****/ 
function handleBackgroundTransition() {
	if (nextBackground && nextBackground.parent) {
		nextBackground.parent.removeChild(nextBackground);
	}
	var newBg = null;
	if (gameState.prestigeCount >= 8) {
		newBg = LK.getAsset('background_tier8', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (gameState.prestigeCount >= 5) {
		newBg = LK.getAsset('background_tier5', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (gameState.prestigeCount >= 3) {
		newBg = LK.getAsset('background_tier3', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else {
		newBg = LK.getAsset('background', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	}
	newBg.x = 2048 / 2;
	newBg.y = 2732 + 2732 / 2;
	game.addChildAt(newBg, 0);
	nextBackground = newBg;
	var oldBg = currentBackground;
	if (!oldBg) {
		oldBg = LK.getAsset('background', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		oldBg.x = 2048 / 2;
		oldBg.y = 2732 / 2;
		game.addChildAt(oldBg, 0);
	}
	if (oldBg === newBg) {
		currentBackground = newBg;
		return;
	}
	var dur = 3000;
	tween(oldBg, {
		y: oldBg.y - 2732
	}, {
		duration: dur,
		onFinish: function onFinish() {
			if (oldBg && oldBg.parent) {
				oldBg.parent.removeChild(oldBg);
			}
		}
	});
	tween(newBg, {
		y: 2732 / 2
	}, {
		duration: dur,
		onFinish: function onFinish() {
			currentBackground = newBg;
		}
	});
}
var clusters = [];
var currentBackground = null;
var nextBackground = null;
var miner = null;
var droneObjects = [];
var droneSprites = [];
// Global prestige main button (appears on the lower left once eligible)
var prestigeMainButton = null;
// Initial spawn of clusters
function initialSpawn() {
	var allTypes = ['coal', 'iron', 'gold', 'diamond', 'sapphire', 'emerald', 'ruby'];
	allTypes.forEach(function (type, idx) {
		var t = idx + 1;
		if (t <= gameState.currentTier) {
			for (var i = 0; i < gameState.maxClustersPerType; i++) {
				maybeSpawnCluster(type);
			}
		}
	});
	maybeSpawnSpecialOres();
}
// Create drones up to droneLevel
function updateDroneObjects() {
	while (droneObjects.length < gameState.droneLevel) {
		var d = new Drone();
		d.x = 200 + Math.random() * (2048 - 400);
		d.y = 200 + Math.random() * (2732 - 400);
		droneObjects.push(d);
		game.addChild(d);
	}
}
function updateDroneSprites() {
	while (droneSprites.length < gameState.droneLevel) {
		var drone = LK.getAsset('drone_asset', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		drone.x = 100 + droneSprites.length * 90;
		drone.y = 200;
		droneSprites.push(drone);
		game.addChild(drone);
	}
}
// Spawn a cluster of a given ore type (if allowed by tier and max count)
function maybeSpawnCluster(type) {
	var typeList = ['coal', 'iron', 'gold', 'diamond', 'sapphire', 'emerald', 'ruby'];
	if (typeList.indexOf(type) >= 0) {
		var tIndex = typeList.indexOf(type) + 1;
		if (tIndex > gameState.currentTier) {
			return;
		}
	}
	if (gameState.clusterCount[type] >= gameState.maxClustersPerType) {
		return;
	}
	var cluster = new Cluster(type);
	game.addChild(cluster);
	clusters.push(cluster);
	gameState.clusterCount[type]++;
}
// Attempt to spawn special ores based on prestige level.
function maybeSpawnSpecialOres() {
	var spawnChances = [];
	if (gameState.prestigeCount >= 3) {
		spawnChances.push({
			type: 'chronostone',
			min: 3,
			max: 5
		});
	}
	if (gameState.prestigeCount >= 5) {
		spawnChances.push({
			type: 'soulember',
			min: 1.5,
			max: 2.5
		});
	}
	if (gameState.prestigeCount >= 8) {
		spawnChances.push({
			type: 'quantumshard',
			min: 0.8,
			max: 1.2
		});
	}
	if (spawnChances.length === 0) {
		return;
	}
	var standardTypes = ['coal', 'iron', 'gold', 'diamond', 'sapphire', 'emerald', 'ruby'];
	standardTypes.forEach(function (type) {
		if (gameState.clusterCount[type] < gameState.maxClustersPerType) {
			for (var i = 0; i < spawnChances.length; i++) {
				var chanceObj = spawnChances[i];
				var chance = randomInt(chanceObj.min * 10, chanceObj.max * 10) / 10;
				var roll = Math.random() * 100;
				if (roll < chance) {
					if (gameState.clusterCount[chanceObj.type] < gameState.maxClustersPerType) {
						maybeSpawnCluster(chanceObj.type);
					}
				}
			}
		}
	});
}
/**** 
* Drone DPS Functions
****/ 
function getDroneDPS() {
	return 10 * gameState.droneLevel;
}
function droneDamageTick() {
	var dps = getDroneDPS();
	if (dps <= 0) {
		return;
	}
	var allValidOres = [];
	clusters.forEach(function (c) {
		c.oreList.forEach(function (ore) {
			if (ore.health > 0 && ore.tier <= gameState.currentTier) {
				allValidOres.push(ore);
			}
		});
	});
	if (allValidOres.length === 0) {
		return;
	}
	var damageRemaining = dps;
	while (damageRemaining > 0 && allValidOres.length > 0) {
		var randomIndex = Math.floor(Math.random() * allValidOres.length);
		var ore = allValidOres[randomIndex];
		var chunk = Math.min(damageRemaining, 10);
		ore.health -= chunk;
		damageRemaining -= chunk;
		if (ore.health <= 0) {
			var baseValue = ore.getValue();
			gameState.money += baseValue;
			updateUI();
			ore.cluster.notifyOreDestroyed(ore);
			spawnMiningParticles(ore, 5);
			allValidOres.splice(randomIndex, 1);
		}
	}
}
/**** 
* UPGRADE DATA
****/ 
var oreUpgrades = {
	coal: [{
		id: 'double_coal',
		name: 'Double Coal Value',
		cost: 100,
		multi: true,
		level: 0,
		maxLevel: 20,
		effect: 'Doubles Coal Value each purchase',
		action: function action() {
			this.level++;
			gameState.oreMultipliers.coal *= 2;
			this.cost *= 2;
		}
	}],
	iron: [{
		id: 'unlock_iron',
		name: 'Unlock Iron Mining',
		cost: 7000,
		effect: 'Allows iron ore clusters to spawn',
		purchased: false,
		action: function action() {
			if (gameState.currentTier < 2) {
				gameState.currentTier = 2;
			}
			for (var i = 0; i < gameState.maxClustersPerType; i++) {
				maybeSpawnCluster('iron');
			}
		}
	}, {
		id: 'double_iron',
		name: 'Double Iron Value',
		cost: 1000,
		multi: true,
		level: 0,
		maxLevel: 20,
		effect: 'Doubles Iron Value each purchase',
		action: function action() {
			this.level++;
			gameState.oreMultipliers.iron *= 2;
			this.cost *= 2;
		}
	}],
	gold: [{
		id: 'unlock_gold',
		name: 'Unlock Gold Mining',
		cost: 70000,
		effect: 'Allows gold ore clusters to spawn',
		purchased: false,
		action: function action() {
			if (gameState.currentTier < 3) {
				gameState.currentTier = 3;
			}
			for (var i = 0; i < gameState.maxClustersPerType; i++) {
				maybeSpawnCluster('gold');
			}
		}
	}, {
		id: 'double_gold',
		name: 'Double Gold Value',
		cost: 20000,
		multi: true,
		level: 0,
		maxLevel: 20,
		effect: 'Doubles Gold Value each purchase',
		action: function action() {
			this.level++;
			gameState.oreMultipliers.gold *= 2;
			this.cost *= 2;
		}
	}],
	diamond: [{
		id: 'unlock_diamond',
		name: 'Unlock Diamond Mining',
		cost: 280000,
		effect: 'Allows diamond ore clusters to spawn',
		purchased: false,
		action: function action() {
			if (gameState.currentTier < 4) {
				gameState.currentTier = 4;
			}
			for (var i = 0; i < gameState.maxClustersPerType; i++) {
				maybeSpawnCluster('diamond');
			}
		}
	}, {
		id: 'double_diamond',
		name: 'Double Diamond Value',
		cost: 50000,
		multi: true,
		level: 0,
		maxLevel: 20,
		effect: 'Doubles Diamond Value each purchase',
		action: function action() {
			this.level++;
			gameState.oreMultipliers.diamond *= 2;
			this.cost *= 2;
		}
	}],
	sapphire: [{
		id: 'unlock_sapphire',
		name: 'Unlock Sapphire Mining',
		cost: 1400000,
		effect: 'Allows sapphire ore clusters to spawn',
		purchased: false,
		action: function action() {
			if (gameState.currentTier < 5) {
				gameState.currentTier = 5;
			}
			for (var i = 0; i < gameState.maxClustersPerType; i++) {
				maybeSpawnCluster('sapphire');
			}
		}
	}, {
		id: 'double_sapphire',
		name: 'Double Sapphire Value',
		cost: 200000,
		multi: true,
		level: 0,
		maxLevel: 20,
		effect: 'Doubles Sapphire Value each purchase',
		action: function action() {
			this.level++;
			gameState.oreMultipliers.sapphire *= 2;
			this.cost *= 2;
		}
	}],
	emerald: [{
		id: 'unlock_emerald',
		name: 'Unlock Emerald Mining',
		cost: 7000000,
		effect: 'Allows emerald ore clusters to spawn',
		purchased: false,
		action: function action() {
			if (gameState.currentTier < 6) {
				gameState.currentTier = 6;
			}
			for (var i = 0; i < gameState.maxClustersPerType; i++) {
				maybeSpawnCluster('emerald');
			}
		}
	}, {
		id: 'double_emerald',
		name: 'Double Emerald Value',
		cost: 1000000,
		multi: true,
		level: 0,
		maxLevel: 20,
		effect: 'Doubles Emerald Value each purchase',
		action: function action() {
			this.level++;
			gameState.oreMultipliers.emerald *= 2;
			this.cost *= 2;
		}
	}],
	ruby: [{
		id: 'unlock_ruby',
		name: 'Unlock Ruby Mining',
		cost: 14000000,
		effect: 'Allows ruby ore clusters to spawn',
		purchased: false,
		action: function action() {
			if (gameState.currentTier < 7) {
				gameState.currentTier = 7;
			}
			for (var i = 0; i < gameState.maxClustersPerType; i++) {
				maybeSpawnCluster('ruby');
			}
		}
	}, {
		id: 'double_ruby',
		name: 'Double Ruby Value',
		cost: 2000000,
		multi: true,
		level: 0,
		maxLevel: 20,
		effect: 'Doubles Ruby Value each purchase',
		action: function action() {
			this.level++;
			gameState.oreMultipliers.ruby *= 2;
			this.cost *= 2;
		}
	}]
};
var generalUpgrades = [{
	id: 'faster_respawn',
	name: 'Quicker Respawn',
	cost: 8000,
	effect: 'Halves respawn time (min 500 ms)',
	multi: true,
	level: 0,
	maxLevel: 3,
	action: function action() {
		gameState.respawnTime = Math.max(500, gameState.respawnTime / 2);
		this.level++;
		this.cost = Math.floor(this.cost * 2);
	}
}, {
	id: 'cluster_up',
	name: 'Cluster Growth',
	cost: 1000,
	effect: 'Increases cluster size range',
	multi: true,
	level: 0,
	maxLevel: 5,
	action: function action() {
		if (gameState.clusterUpgradeTier < gameState.clusterConfigLevels.length - 1) {
			gameState.clusterUpgradeTier++;
		}
		this.level++;
		this.cost += 2000;
	}
}, {
	id: 'pickaxe_buff',
	name: 'Pickaxe DMG +20%',
	cost: 20000,
	effect: 'Increases your total pickaxe damage by 20%',
	multi: true,
	level: 0,
	maxLevel: 20,
	action: function action() {
		this.level++;
		gameState.pickaxeBaseMultiplier *= 1.2;
		this.cost = Math.floor(this.cost * 2);
	}
},
// New: Tap Damage Upgrade (increases tap/click damage)
{
	id: 'tap_damage',
	name: 'Tap Damage Upgrade',
	cost: 5000,
	effect: 'Increase tap damage by 50%',
	multi: true,
	level: 0,
	maxLevel: 20,
	action: function action() {
		this.level++;
		gameState.tapDamage = gameState.tapDamage * 1.5;
		this.cost = Math.floor(this.cost * 2);
	}
},
// New: Miner Swing Speed Upgrade (reduces miner cooldown)
{
	id: 'miner_speed',
	name: 'Miner Swing Speed Upgrade',
	cost: 20000,
	effect: 'Increase miner swing speed (reduce cooldown by 10%)',
	multi: true,
	level: 0,
	maxLevel: 20,
	action: function action() {
		this.level++;
		miner.miningRate = Math.max(1, Math.floor(miner.miningRate * 0.9));
		this.cost = Math.floor(this.cost * 2);
	}
}];
var prestigeUpgrades = [{
	id: 'pickaxe_plus_1',
	name: 'Pickaxe Level +1',
	cost: 3,
	effect: 'Increases pickaxe damage by 1',
	purchased: false,
	action: function action() {
		gameState.pickaxeLevel++;
	}
}, {
	id: 'pickaxe_plus_2',
	name: 'Pickaxe Speed +10%',
	cost: 4,
	effect: 'Reduces mining cooldown by 10%',
	purchased: false,
	action: function action() {
		miner.miningRate = Math.floor(miner.miningRate * 0.90);
		if (miner.miningRate < 1) {
			miner.miningRate = 1;
		}
	}
}, {
	id: 'pickaxe_plus_3',
	name: 'Pickaxe Bonus DMG +2',
	cost: 6,
	effect: 'Increases pickaxe damage by an additional 2',
	purchased: false,
	action: function action() {
		gameState.pickaxeLevel += 2;
	}
}, {
	id: 'pickaxe_plus_4',
	name: 'Mega Pickaxe',
	cost: 15,
	effect: 'Increases pickaxe damage by an additional 5',
	purchased: false,
	action: function action() {
		gameState.pickaxeLevel += 5;
	}
}];
var prestigeDrones = [{
	id: 'drone_speedup',
	name: 'Drone Technology +1',
	cost: 8,
	effect: 'Increases Drone DPS by 50',
	purchased: false,
	action: function action() {
		if (!gameState.droneLevel) {
			gameState.droneLevel = 0;
		}
		gameState.droneLevel += 5;
	}
}, {
	id: 'drone_overclock',
	name: 'Drone Overclock',
	cost: 12,
	effect: 'Increases Drone DPS by 100',
	purchased: false,
	action: function action() {
		gameState.droneLevel += 10;
	}
}];
var droneUpgrades = [{
	id: 'drone_level_1',
	name: 'Buy Drones (Lv +1)',
	cost: 5000,
	effect: 'Each level adds +10 DPS',
	purchased: false,
	multi: true,
	level: 0,
	maxLevel: 20,
	action: function action() {
		if (!gameState.droneLevel) {
			gameState.droneLevel = 0;
		}
		gameState.droneLevel++;
		this.level++;
		this.cost = Math.floor(this.cost * 1.5);
		updateDroneObjects();
	}
}];
/**** 
* UI
****/ 
var upgradeMenu = new Container();
upgradeMenu.zIndex = 10000; // Force upgrade menu on top.
var tooltip = new Text2('', {
	size: 40,
	fill: 0xFFFFFF
});
game.addChild(tooltip);
var moneyDisplay = new Text2('$0', {
	size: 80,
	fill: 0xFFFFFF,
	fontWeight: 'bold',
	stroke: 0x000000,
	strokeThickness: 5
});
moneyDisplay.x = 2048 / 2 - moneyDisplay.width / 2;
moneyDisplay.y = 50;
game.addChild(moneyDisplay);
var prestigeDisplay = new Text2('Prestige: 0', {
	size: 50,
	fill: 0xFFFFFF,
	fontWeight: 'bold',
	stroke: 0x000000,
	strokeThickness: 4
});
prestigeDisplay.x = 250;
prestigeDisplay.y = 50;
game.addChild(prestigeDisplay);
var shopOpenButton = LK.getAsset('shop_icon', {
	anchorX: 0.5,
	anchorY: 0.5
});
shopOpenButton.x = 2048 - 150;
shopOpenButton.y = 2732 - 150;
shopOpenButton.down = function () {
	createMainUpgradeMenu();
	game.addChild(upgradeMenu);
	upgradeMenu.parent.setChildIndex(upgradeMenu, upgradeMenu.parent.children.length - 1);
};
game.addChild(shopOpenButton);
// Debug: Add money button
var addMoneyButton = LK.getAsset('buy_button', {
	anchorX: 0.5,
	anchorY: 0.5
});
addMoneyButton.x = 200;
addMoneyButton.y = 2732 - 300;
addMoneyButton.down = function () {
	gameState.money += 5000000000;
	updateUI();
};
game.addChild(addMoneyButton);
/**** 
* UPGRADE MODAL HELPER – for confirming an upgrade.
****/ 
function showUpgradeModal(upg, btn, callback) {
	var modal = new Container();
	var bg = LK.getAsset('upgrade_popup_bg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	modal.addChild(bg);
	var nextCost = upg.multi ? Math.floor(upg.cost * 2) : upg.cost;
	var textStr = upg.effect + "\nCost: $" + upg.cost;
	if (upg.multi) {
		textStr += "   Next: $" + nextCost;
	}
	var desc = new Text2(textStr, {
		size: 35,
		fill: 0xFFFFFF,
		align: 'center'
	});
	desc.anchor.set(0.5);
	modal.addChild(desc);
	var upgradeBtn = LK.getAsset('upgrade_confirm_button', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	upgradeBtn.x = -100;
	upgradeBtn.y = 60;
	modal.addChild(upgradeBtn);
	var upgradeTxt = new Text2("Upgrade", {
		size: 35,
		fill: 0x000000,
		align: 'center'
	});
	upgradeTxt.anchor.set(0.5);
	upgradeTxt.x = upgradeBtn.x;
	upgradeTxt.y = upgradeBtn.y;
	modal.addChild(upgradeTxt);
	var cancelBtn = LK.getAsset('cancelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	cancelBtn.x = 100;
	cancelBtn.y = 60;
	modal.addChild(cancelBtn);
	modal.x = btn.x;
	modal.y = btn.y - 150;
	upgradeMenu.addChild(modal);
	upgradeMenu.parent.setChildIndex(upgradeMenu, upgradeMenu.parent.children.length - 1);
	upgradeBtn.down = function () {
		callback(true);
		modal.destroy();
	};
	cancelBtn.down = function () {
		callback(false);
		modal.destroy();
	};
	upgradeMenu.down = function (event) {
		modal.destroy();
	};
}
/**** 
* PRESTIGE MODAL – uses custom assets for the popup and Yes button.
****/ 
function showPrestigeModal() {
	var modal = new Container();
	var popup = LK.getAsset('prestige_popup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	modal.addChild(popup);
	var req = getPrestigeRequirement();
	var prompt = new Text2("Prestige?\nYou need: $" + req.toLocaleString() + "\nYou have: $" + Math.floor(gameState.money).toLocaleString(), {
		size: 40,
		fill: 0xFFFFFF,
		align: 'center'
	});
	prompt.anchor.set(0.5);
	modal.addChild(prompt);
	popup.x = 0;
	popup.y = 0;
	prompt.x = 0;
	prompt.y = -30;
	var yesBtn = LK.getAsset('yes_button', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	yesBtn.x = -100;
	yesBtn.y = 60;
	modal.addChild(yesBtn);
	var noBtn = LK.getAsset('cancelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	noBtn.x = 100;
	noBtn.y = 60;
	modal.addChild(noBtn);
	modal.x = 2048 / 2;
	modal.y = 2732 / 2;
	upgradeMenu.addChild(modal);
	yesBtn.down = function () {
		if (canPrestige()) {
			doPrestige();
			modal.destroy();
			upgradeMenu.removeChild(modal);
		}
	};
	noBtn.down = function () {
		modal.destroy();
		upgradeMenu.removeChild(modal);
	};
	upgradeMenu.down = function (event) {
		modal.destroy();
	};
}
/**** 
* MAIN UPGRADE MENU – arranged in two columns with tabs moved upward.
* Contains a "Prestige" category which now does not include a "Prestige Now" button (that is on the main screen).
****/ 
function createMainUpgradeMenu() {
	upgradeMenu.removeChildren();
	subUpgradeItemRefs = [];
	var menuBg = LK.getAsset('rectangle', {
		width: 1800,
		height: 2200,
		color: 0x2a2a2a,
		anchorX: 0.5,
		anchorY: 0.5
	});
	menuBg.alpha = 0.9;
	menuBg.x = 2048 / 2;
	menuBg.y = 2732 / 2 + 50;
	upgradeMenu.addChild(menuBg);
	var categories = [{
		name: 'Coal Upgrades',
		type: 'coal'
	}, {
		name: 'Iron Upgrades',
		type: 'iron'
	}, {
		name: 'Gold Upgrades',
		type: 'gold'
	}, {
		name: 'Diamond Upgrades',
		type: 'diamond'
	}, {
		name: 'Sapphire Upgrades',
		type: 'sapphire'
	}, {
		name: 'Emerald Upgrades',
		type: 'emerald'
	}, {
		name: 'Ruby Upgrades',
		type: 'ruby'
	}, {
		name: 'General Upgrades',
		type: 'general'
	}, {
		name: 'Drones',
		type: 'drones'
	}, {
		name: 'Achievements',
		type: 'achievements'
	}, {
		name: 'Prestige',
		type: 'prestige'
	}];
	var colSpacing = 400,
		rowSpacing = 300;
	for (var i = 0; i < categories.length; i++) {
		var col = i % 2;
		var row = Math.floor(i / 2);
		var x = menuBg.x + (col === 0 ? -colSpacing : colSpacing);
		// Tabs moved upward:
		var y = menuBg.y - 800 + row * rowSpacing;
		var btn = LK.getAsset('buy_button', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		btn.x = x;
		btn.y = y;
		upgradeMenu.addChild(btn);
		var txt = new Text2(categories[i].name, {
			size: 50,
			fill: 0x000000,
			align: 'center'
		});
		txt.anchor.set(0.5);
		txt.x = btn.x;
		txt.y = btn.y;
		upgradeMenu.addChild(txt);
		btn.down = function (cat) {
			return function (event) {
				event.stopPropagation && event.stopPropagation();
				hideUpgradeDesc();
				if (cat.type === 'general') {
					createSubUpgradeMenu('General Upgrades', generalUpgrades);
				} else if (cat.type === 'drones') {
					createSubUpgradeMenu('Drone Upgrades', droneUpgrades);
				} else if (cat.type === 'achievements') {
					createAchievementsMenu();
				} else if (cat.type === 'prestige') {
					createPrestigeMenu();
				} else {
					createSubUpgradeMenu(cat.name, oreUpgrades[cat.type]);
				}
			};
		}(categories[i]);
	}
	var closeBtn = LK.getAsset('cancelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	closeBtn.x = menuBg.x + 750;
	closeBtn.y = menuBg.y - 950;
	closeBtn.down = function () {
		game.removeChild(upgradeMenu);
	};
	upgradeMenu.addChild(closeBtn);
	upgradeMenu.down = function (event) {
		hideUpgradeDesc();
	};
	upgradeMenu.parent && upgradeMenu.parent.setChildIndex(upgradeMenu, upgradeMenu.parent.children.length - 1);
}
var subUpgradeItemRefs = [];
function createSubUpgradeMenu(title, upgList) {
	upgradeMenu.removeChildren();
	subUpgradeItemRefs = [];
	var menuBg = LK.getAsset('rectangle', {
		width: 1800,
		height: 2200,
		color: 0x2a2a2a,
		anchorX: 0.5,
		anchorY: 0.5
	});
	menuBg.alpha = 0.9;
	menuBg.x = 2048 / 2;
	menuBg.y = 2732 / 2 + 50;
	upgradeMenu.addChild(menuBg);
	var titleText = new Text2(title, {
		size: 60,
		fill: 0xFFFFFF,
		align: 'center'
	});
	titleText.anchor.set(0.5);
	titleText.x = menuBg.x;
	titleText.y = menuBg.y - 1000;
	upgradeMenu.addChild(titleText);
	var startY = menuBg.y - 800;
	var colSpacing = 400;
	for (var i = 0; i < upgList.length; i++) {
		var col = i % 2;
		var row = Math.floor(i / 2);
		var btn = LK.getAsset('buy_button', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		btn.x = menuBg.x + (col === 0 ? -colSpacing : colSpacing);
		btn.y = startY + row * 250;
		upgradeMenu.addChild(btn);
		var displayName = upgList[i].name;
		if (typeof upgList[i].level === 'number' && upgList[i].level > 0) {
			displayName += " (Lv " + upgList[i].level + ")";
		}
		var txt = new Text2(displayName + "\nCost: $" + upgList[i].cost, {
			size: 45,
			fill: 0x000000,
			align: 'center'
		});
		txt.anchor.set(0.5);
		txt.x = btn.x;
		txt.y = btn.y;
		upgradeMenu.addChild(txt);
		btn.down = function (upg, btn) {
			return function (event) {
				event.stopPropagation && event.stopPropagation();
				showUpgradeModal(upg, btn, function (confirmed) {
					if (confirmed && canPurchaseUpgrade(upgList, upg)) {
						gameState.money -= upg.cost;
						upg.purchased = true;
						upg.action();
						updateUI();
						createSubUpgradeMenu(title, upgList);
					}
				});
			};
		}(upgList[i], btn);
		subUpgradeItemRefs.push({
			upgList: upgList,
			upgrade: upgList[i],
			textObj: txt
		});
	}
	var backBtn = LK.getAsset('cancelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	backBtn.x = menuBg.x + 700;
	backBtn.y = menuBg.y - 1000;
	backBtn.down = function () {
		createMainUpgradeMenu();
	};
	upgradeMenu.addChild(backBtn);
	upgradeMenu.down = function (event) {
		hideUpgradeDesc();
	};
}
function canPurchaseUpgrade(upgList, upg) {
	if (upg.requires) {
		var needed = upgList.find(function (u) {
			return u.id === upg.requires;
		});
		if (!needed || !needed.purchased) {
			return false;
		}
	}
	if (upg.multi && upg.maxLevel !== undefined && upg.level >= upg.maxLevel) {
		return false;
	}
	if (!upg.multi && upg.purchased) {
		return false;
	}
	if (gameState.money < upg.cost) {
		return false;
	}
	return true;
}
/**** 
* PRESTIGE SHOP MENU – now integrated as the "Prestige" tab.
****/ 
function createPrestigeMenu() {
	upgradeMenu.removeChildren();
	subUpgradeItemRefs = [];
	var menuBg = LK.getAsset('rectangle', {
		width: 1800,
		height: 2200,
		color: 0x2a2a2a,
		anchorX: 0.5,
		anchorY: 0.5
	});
	menuBg.alpha = 0.9;
	menuBg.x = 2048 / 2;
	menuBg.y = 2732 / 2 + 50;
	upgradeMenu.addChild(menuBg);
	var titleText = new Text2('Prestige Shop', {
		size: 60,
		fill: 0xFFFFFF,
		align: 'center'
	});
	titleText.anchor.set(0.5);
	titleText.x = menuBg.x;
	titleText.y = menuBg.y - 1000;
	upgradeMenu.addChild(titleText);
	// List prestige upgrades in two columns with increased spacing.
	var combinedUpgrades = prestigeUpgrades.concat(prestigeDrones);
	var colSpacing = 400,
		rowSpacing = 300;
	var startX = menuBg.x - colSpacing / 2;
	for (var i = 0; i < combinedUpgrades.length; i++) {
		var col = i % 2;
		var row = Math.floor(i / 2);
		var btn = LK.getAsset('buy_button', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		btn.x = startX + col * colSpacing;
		btn.y = menuBg.y - 500 + row * rowSpacing;
		upgradeMenu.addChild(btn);
		var txtStr = combinedUpgrades[i].name + "\nCost: " + combinedUpgrades[i].cost + " Shards";
		var txt = new Text2(txtStr, {
			size: 45,
			fill: 0x000000,
			align: 'center'
		});
		txt.anchor.set(0.5);
		txt.x = btn.x;
		txt.y = btn.y;
		upgradeMenu.addChild(txt);
		btn.down = function (upg, btn) {
			return function (event) {
				event.stopPropagation && event.stopPropagation();
				showUpgradeModal(upg, btn, function (confirmed) {
					if (confirmed && gameState.prestigeCurrency >= upg.cost) {
						gameState.prestigeCurrency -= upg.cost;
						upg.action();
						updateUI();
						createPrestigeMenu();
					}
				});
			};
		}(combinedUpgrades[i], btn);
	}
	var backBtn = LK.getAsset('cancelButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	backBtn.x = menuBg.x + 700;
	backBtn.y = menuBg.y - 1000;
	backBtn.down = function () {
		createMainUpgradeMenu();
	};
	upgradeMenu.addChild(backBtn);
	upgradeMenu.down = function (event) {
		hideUpgradeDesc();
	};
}
/**** 
* GAME LOOP
****/ 
var quantumSelectTimer = 0;
var quantumSelectionActive = false;
game.update = function () {
	if (miner) {
		miner.update();
	}
	for (var i = 0; i < droneObjects.length; i++) {
		droneObjects[i].updateDrone();
	}
	if (typeof LK.time !== 'undefined' && LK.time.elapsed % 60 === 0) {
		droneDamageTick();
	}
	clusters.forEach(function (cluster) {
		cluster.oreList.forEach(function (ore) {
			if (ore.health > 0) {
				var fraction = ore.health / ore.maxHealth;
				ore.healthBar.width = 120 * fraction;
				ore.healthBar.fill = interpolateColor(0xFF0000, 0x00FF00, fraction);
				ore.alpha = fraction;
			}
		});
	});
	if (upgradeMenu.parent) {
		subUpgradeItemRefs.forEach(function (ref) {
			var upg = ref.upgrade;
			var canBuy = canPurchaseUpgrade(ref.upgList, upg);
			if (ref.textObj && ref.textObj.style) {
				ref.textObj.style.fill = canBuy ? 0xFFFFFF : 0x666666;
			}
		});
	}
	if (quantumSelectionActive) {
		quantumSelectTimer++;
		if (quantumSelectTimer > 15 * 60) {
			quantumSelectionActive = false;
			miner.quantumPathActive = false;
		}
	}
	// Check achievements and show popup for newly unlocked ones.
	achievements.forEach(function (ach) {
		if (!ach.achieved && ach.condition()) {
			ach.achieved = true;
			var achText = new Text2("Achievement Unlocked: " + ach.name, {
				size: 40,
				fill: 0xFFFF00
			});
			achText.x = 2048 / 2;
			achText.y = 100;
			game.addChild(achText);
			tween(achText, {
				alpha: 0
			}, {
				duration: 2000,
				onFinish: function onFinish() {
					achText.destroy();
				}
			});
		}
	});
	// Ensure the prestige main button appears on the lower left when eligible.
	if (canPrestige()) {
		if (!prestigeMainButton) {
			prestigeMainButton = LK.getAsset('prestige_main_button', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			prestigeMainButton.x = 150;
			prestigeMainButton.y = 2732 - 150;
			prestigeMainButton.down = function () {
				doPrestige();
				if (prestigeMainButton && prestigeMainButton.parent) {
					prestigeMainButton.parent.removeChild(prestigeMainButton);
					prestigeMainButton = null;
				}
			};
			game.addChild(prestigeMainButton);
		}
	} else {
		if (prestigeMainButton) {
			if (prestigeMainButton.parent) {
				prestigeMainButton.parent.removeChild(prestigeMainButton);
			}
			prestigeMainButton = null;
		}
	}
};
/**** 
* UI REFRESH & SAVE/LOAD
****/ 
function updateUI() {
	moneyDisplay.setText("$" + Math.floor(gameState.money).toLocaleString());
	moneyDisplay.x = 2048 / 2 - moneyDisplay.width / 2;
	prestigeDisplay.setText("Prestige: " + gameState.prestigeCount);
}
LK.saveGame = function () {
	return gameState;
};
LK.loadGame = function (data) {
	gameState = data;
	updateUI();
};
/**** 
* START GAME
****/ 
function startGame() {
	currentBackground = LK.getAsset('background', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	currentBackground.x = 2048 / 2;
	currentBackground.y = 2732 / 2;
	game.addChildAt(currentBackground, 0);
	miner = new Miner();
	miner.x = 2048 / 2;
	miner.y = 2732 / 2;
	game.addChild(miner);
	initialSpawn();
	updateUI();
}
startGame();
game.pauseForQuantumSelection = function () {
	quantumSelectionActive = true;
	quantumSelectTimer = 0;
	// (Optional: darken screen, highlight ores, etc.)
};

===================================================================
--- original.js
+++ change.js
@@ -483,9 +483,8 @@
 		}, {
 			duration: 1000,
 			onFinish: function onFinish() {
 				p.destroy();
-				game.sortChildren();
 			}
 		});
 		game.addChild(p);
 	}