/**** 
* Classes
****/ 
// Enemy class: represents an enemy that moves toward the wizard
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	// Attach a unique enemy asset (pixel blue monster)
	var enemySprite = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Enemy speed and direction
	self.vx = 0;
	self.vy = 0;
	// Track last position for event triggers
	self.lastX = 0;
	self.lastY = 0;
	self.health = 1; // Enemy1: 1 hit to kill
	self.type = 1;
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		// Pulsate scale for movement effect
		var t = LK.ticks || Date.now(); // fallback for safety
		var scale = 1 + 0.15 * Math.sin((t + self.x + self.y) * 0.05);
		if (self.children && self.children.length > 0) {
			self.children[0].scale.x = scale;
			self.children[0].scale.y = scale;
		}
		// Remove enemy if it leaves the screen
		if (self.x < -100 || self.x > 2048 + 100 || self.y < -100 || self.y > 2732 + 100) {
			self.destroy();
		}
		self.lastX = self.x;
		self.lastY = self.y;
	};
	return self;
});
// Enemy2: needs 2 fireballs to die
var Enemy2 = Container.expand(function () {
	var self = Container.call(this);
	var enemySprite = self.attachAsset('enemy2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.vx = 0;
	self.vy = 0;
	self.lastX = 0;
	self.lastY = 0;
	self.health = 2;
	self.type = 2;
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		var t = LK.ticks || Date.now();
		var scale = 1 + 0.18 * Math.sin((t + self.x + self.y) * 0.06);
		if (self.children && self.children.length > 0) {
			self.children[0].scale.x = scale;
			self.children[0].scale.y = scale;
		}
		if (self.x < -100 || self.x > 2048 + 100 || self.y < -100 || self.y > 2732 + 100) {
			self.destroy();
		}
		self.lastX = self.x;
		self.lastY = self.y;
	};
	return self;
});
// Enemy3: needs 3 fireballs to die
var Enemy3 = Container.expand(function () {
	var self = Container.call(this);
	var enemySprite = self.attachAsset('enemy3', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.vx = 0;
	self.vy = 0;
	self.lastX = 0;
	self.lastY = 0;
	self.health = 3;
	self.type = 3;
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		var t = LK.ticks || Date.now();
		var scale = 1 + 0.22 * Math.sin((t + self.x + self.y) * 0.07);
		if (self.children && self.children.length > 0) {
			self.children[0].scale.x = scale;
			self.children[0].scale.y = scale;
		}
		if (self.x < -100 || self.x > 2048 + 100 || self.y < -100 || self.y > 2732 + 100) {
			self.destroy();
		}
		self.lastX = self.x;
		self.lastY = self.y;
	};
	return self;
});
// Fireball class: represents a fireball shot by the wizard
var Fireball = Container.expand(function () {
	var self = Container.call(this);
	// Attach fireball asset (pixel fireball)
	var fireballSprite = self.attachAsset('fireball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Fireball speed and direction
	self.vx = 0;
	self.vy = 0;
	// Track last position for event triggers
	self.lastX = 0;
	self.lastY = 0;
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		// Remove fireball if it leaves the screen
		if (self.x < -100 || self.x > 2048 + 100 || self.y < -100 || self.y > 2732 + 100) {
			self.destroy();
		}
		self.lastX = self.x;
		self.lastY = self.y;
	};
	return self;
});
// Wizard class: represents the player character
var Wizard = Container.expand(function () {
	var self = Container.call(this);
	// Attach wizard asset (blue hat, pixel style)
	var wizardSprite = self.attachAsset('wizard', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Track last position for event triggers
	self.lastX = 0;
	self.lastY = 0;
	// Update method (called every tick)
	self.update = function () {
		// No movement logic here; wizard is moved by mouse/touch
		self.lastX = self.x;
		self.lastY = self.y;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Upgrade button assets
;
// Add background image to the game scene
var background = LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0,
	width: 2048,
	height: 2732
});
game.addChild(background);
// --- Game Code for Pixel Wizard: Blue Hat Adventure ---
// Create wizard instance and add to game
var wizard = new Wizard();
game.addChild(wizard);
// Center wizard on screen at start
wizard.x = 2048 / 2;
wizard.y = 2732 / 2;
// Array to hold all fireballs
var fireballs = [];
// Helper: get direction vector from wizard to (x, y)
function getDirection(fromX, fromY, toX, toY, speed) {
	var dx = toX - fromX;
	var dy = toY - fromY;
	var len = Math.sqrt(dx * dx + dy * dy);
	if (len === 0) return {
		vx: 0,
		vy: 0
	};
	return {
		vx: dx / len * speed,
		vy: dy / len * speed
	};
}
// Dragging wizard with mouse/touch (disabled)
var dragging = false;
// Move handler: wizard does not move
game.move = function (x, y, obj) {
	// Wizard is fixed; do nothing
	// Calculate angle from wizard to pointer/touch and rotate wizard sprite
	var dx = x - wizard.x;
	var dy = y - wizard.y;
	var angle = Math.atan2(dy, dx);
	// Wizard's default asset faces left, so add Math.PI to rotate to correct direction
	if (wizard.children && wizard.children.length > 0) {
		wizard.children[0].rotation = angle + Math.PI;
	}
};
// Down handler: only shoot fireball toward cursor/touch
game.down = function (x, y, obj) {
	// Prevent shooting if upgrade UI is open
	if (typeof upgradeUI !== "undefined" && upgradeUI) return;
	// Fireball cooldown logic
	if (typeof fireballLastShot === "undefined") fireballLastShot = 0;
	if (typeof fireballCooldownBase === "undefined") fireballCooldownBase = 600;
	var now = Date.now();
	var cooldown = fireballCooldownBase;
	if (now - fireballLastShot < cooldown) return;
	fireballLastShot = now;
	// Always shoot fireball toward cursor/touch
	var fireball = new Fireball();
	fireball.x = wizard.x;
	fireball.y = wizard.y;
	var dir = getDirection(wizard.x, wizard.y, x, y, 8); // 8 px per frame (much slower)
	fireball.vx = dir.vx;
	fireball.vy = dir.vy;
	// Calculate angle for rotation (in radians)
	var angle = Math.atan2(dir.vy, dir.vx);
	// Set fireball sprite rotation to match direction
	if (fireball.children && fireball.children.length > 0) {
		fireball.children[0].rotation = angle;
	}
	// Also rotate wizard to face the shot direction
	if (wizard.children && wizard.children.length > 0) {
		wizard.children[0].rotation = Math.atan2(y - wizard.y, x - wizard.x) + Math.PI;
	}
	fireballs.push(fireball);
	game.addChild(fireball);
};
// Up handler: nothing to do
game.up = function (x, y, obj) {
	// Wizard is fixed; do nothing
};
// Array to hold all enemies
var enemies = [];
// Score variable
var score = 0;
// Score text
var scoreText = new Text2("Score: 0", {
	size: 100,
	fill: "#fff"
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
// Helper: spawn an enemy at a random edge, moving toward wizard
function spawnEnemy() {
	// Determine which enemy types are available based on score
	var availableTypes = [1];
	if (score >= 10) availableTypes.push(2);
	if (score >= 20) availableTypes.push(3);
	// Randomly pick an available type
	var typeIdx = Math.floor(Math.random() * availableTypes.length);
	var enemyType = availableTypes[typeIdx];
	var enemy;
	if (enemyType === 1) {
		enemy = new Enemy();
	} else if (enemyType === 2) {
		enemy = new Enemy2();
	} else {
		enemy = new Enemy3();
	}
	// Randomly pick an edge: 0=top, 1=bottom, 2=left, 3=right
	var edge = Math.floor(Math.random() * 4);
	var ex, ey;
	if (edge === 0) {
		// top
		ex = Math.random() * 2048;
		ey = -50;
	} else if (edge === 1) {
		// bottom
		ex = Math.random() * 2048;
		ey = 2732 + 50;
	} else if (edge === 2) {
		// left
		ex = -50;
		ey = Math.random() * 2732;
	} else {
		// right
		ex = 2048 + 50;
		ey = Math.random() * 2732;
	}
	enemy.x = ex;
	enemy.y = ey;
	// Move toward wizard
	var dir = getDirection(ex, ey, wizard.x, wizard.y, 2.5 + Math.random() * 1.5); // randomize speed a bit
	enemy.vx = dir.vx;
	enemy.vy = dir.vy;
	enemies.push(enemy);
	game.addChild(enemy);
}
// Enemy spawn timer
var enemySpawnTimer = LK.setInterval(function () {
	spawnEnemy();
}, 1200);
// Game update: update wizard, fireballs, enemies, handle collisions, and scoring
game.update = function () {
	// Update wizard
	if (wizard.update) wizard.update();
	// Update fireballs and remove destroyed ones
	for (var i = fireballs.length - 1; i >= 0; i--) {
		var fb = fireballs[i];
		if (fb.update) fb.update();
		if (fb.destroyed) {
			fireballs.splice(i, 1);
		}
	}
	// --- Upgrade UI logic ---
	if (typeof upgradeUIShown === "undefined") upgradeUIShown = false;
	if (typeof attackSpeedLevel === "undefined") attackSpeedLevel = 0;
	if (typeof damageLevel === "undefined") damageLevel = 0;
	if (typeof fireballDamage === "undefined") fireballDamage = 1;
	if (typeof fireballCooldown === "undefined") fireballCooldown = 0;
	if (typeof fireballCooldownBase === "undefined") fireballCooldownBase = 0;
	if (!upgradeUIShown && score >= 10) {
		// Pause enemy spawn
		if (typeof enemySpawnTimer !== "undefined") LK.clearInterval(enemySpawnTimer);
		// Create upgrade UI container
		upgradeUIShown = true;
		upgradeUI = new Container();
		// Dim background
		var dimBg = LK.getAsset('background', {
			anchorX: 0,
			anchorY: 0,
			x: 0,
			y: 0,
			width: 2048,
			height: 2732
		});
		dimBg.alpha = 0.7;
		upgradeUI.addChild(dimBg);
		// Attack speed button (left)
		var atkBtn = LK.getAsset('upgrade_attack', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: 2048 / 2 - 350,
			y: 2732 / 2
		});
		upgradeUI.addChild(atkBtn);
		// Damage button (right)
		var dmgBtn = LK.getAsset('upgrade_damage', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: 2048 / 2 + 350,
			y: 2732 / 2
		});
		upgradeUI.addChild(dmgBtn);
		// Attack speed label
		var atkLabel = new Text2("Saldırı Hızı+", {
			size: 70,
			fill: "#fff"
		});
		atkLabel.anchor.set(0.5, 0);
		atkLabel.x = atkBtn.x;
		atkLabel.y = atkBtn.y + 140;
		upgradeUI.addChild(atkLabel);
		// Damage label
		var dmgLabel = new Text2("Damage+", {
			size: 70,
			fill: "#fff"
		});
		dmgLabel.anchor.set(0.5, 0);
		dmgLabel.x = dmgBtn.x;
		dmgLabel.y = dmgBtn.y + 140;
		upgradeUI.addChild(dmgLabel);
		// Add to GUI overlay (centered)
		LK.gui.center.addChild(upgradeUI);
		// Button handlers
		atkBtn.down = function (x, y, obj) {
			attackSpeedLevel += 1;
			// Lower fireball cooldown (minimum 200ms)
			fireballCooldownBase = Math.max(200, 600 - attackSpeedLevel * 150);
			// Remove UI
			if (upgradeUI && upgradeUI.parent) upgradeUI.parent.removeChild(upgradeUI);
			upgradeUI = null;
			// Resume enemy spawn
			enemySpawnTimer = LK.setInterval(function () {
				spawnEnemy();
			}, 1200);
		};
		dmgBtn.down = function (x, y, obj) {
			damageLevel += 1;
			fireballDamage = 2;
			// Remove UI
			if (upgradeUI && upgradeUI.parent) upgradeUI.parent.removeChild(upgradeUI);
			upgradeUI = null;
			// Resume enemy spawn
			enemySpawnTimer = LK.setInterval(function () {
				spawnEnemy();
			}, 1200);
		};
	}
	// Update enemies and remove destroyed ones
	for (var j = enemies.length - 1; j >= 0; j--) {
		var enemy = enemies[j];
		if (enemy.update) enemy.update();
		if (enemy.destroyed) {
			enemies.splice(j, 1);
			continue;
		}
		// Check collision with wizard (game over)
		if (enemy.lastWasIntersecting === undefined) enemy.lastWasIntersecting = false;
		var nowIntersecting = enemy.intersects(wizard);
		if (!enemy.lastWasIntersecting && nowIntersecting) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
		enemy.lastWasIntersecting = nowIntersecting;
		// Check collision with fireballs
		for (var k = fireballs.length - 1; k >= 0; k--) {
			var fb = fireballs[k];
			if (enemy['fb' + k + '_lastIntersecting'] === undefined) enemy['fb' + k + '_lastIntersecting'] = false;
			var fbIntersect = enemy.intersects(fb);
			if (!enemy['fb' + k + '_lastIntersecting'] && fbIntersect) {
				// Decrease enemy health by fireballDamage (default 1, 2 if upgraded)
				enemy.health -= typeof fireballDamage !== "undefined" ? fireballDamage : 1;
				// Destroy fireball
				fb.destroy();
				fireballs.splice(k, 1);
				// If enemy health reaches 0, destroy enemy and increase score
				if (enemy.health <= 0) {
					enemy.destroy();
					enemies.splice(j, 1);
					score += 1;
					scoreText.setText("Score: " + score);
					break;
				}
			}
			enemy['fb' + k + '_lastIntersecting'] = fbIntersect;
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -151,8 +151,9 @@
 
 /**** 
 * Game Code
 ****/ 
+// Upgrade button assets
 ;
 // Add background image to the game scene
 var background = LK.getAsset('background', {
 	anchorX: 0,
@@ -201,19 +202,24 @@
 	}
 };
 // Down handler: only shoot fireball toward cursor/touch
 game.down = function (x, y, obj) {
-	// Always shoot fireball toward cursor/touch
+	// Prevent shooting if upgrade UI is open
+	if (typeof upgradeUI !== "undefined" && upgradeUI) return;
 	// Fireball cooldown logic
-	if (fireballCooldown > 0) return;
-	fireballCooldown = fireballDelay;
+	if (typeof fireballLastShot === "undefined") fireballLastShot = 0;
+	if (typeof fireballCooldownBase === "undefined") fireballCooldownBase = 600;
+	var now = Date.now();
+	var cooldown = fireballCooldownBase;
+	if (now - fireballLastShot < cooldown) return;
+	fireballLastShot = now;
+	// Always shoot fireball toward cursor/touch
 	var fireball = new Fireball();
 	fireball.x = wizard.x;
 	fireball.y = wizard.y;
-	var dir = getDirection(wizard.x, wizard.y, x, y, fireballSpeed);
+	var dir = getDirection(wizard.x, wizard.y, x, y, 8); // 8 px per frame (much slower)
 	fireball.vx = dir.vx;
 	fireball.vy = dir.vy;
-	fireball.damage = fireballDamage || 1; // set damage property
 	// Calculate angle for rotation (in radians)
 	var angle = Math.atan2(dir.vy, dir.vx);
 	// Set fireball sprite rotation to match direction
 	if (fireball.children && fireball.children.length > 0) {
@@ -233,15 +239,8 @@
 // Array to hold all enemies
 var enemies = [];
 // Score variable
 var score = 0;
-// Upgrade state
-var upgradePopup = null;
-var upgradeActive = false;
-var fireballSpeed = 8; // default fireball speed
-var fireballDamage = 1; // default fireball damage
-var fireballCooldown = 0; // ticks until next fireball allowed
-var fireballDelay = 0; // minimum ticks between fireballs (0 = no delay)
 // Score text
 var scoreText = new Text2("Score: 0", {
 	size: 100,
 	fill: "#fff"
@@ -301,18 +300,101 @@
 // Game update: update wizard, fireballs, enemies, handle collisions, and scoring
 game.update = function () {
 	// Update wizard
 	if (wizard.update) wizard.update();
-	// Update fireball cooldown
-	if (fireballCooldown > 0) fireballCooldown--;
 	// Update fireballs and remove destroyed ones
 	for (var i = fireballs.length - 1; i >= 0; i--) {
 		var fb = fireballs[i];
 		if (fb.update) fb.update();
 		if (fb.destroyed) {
 			fireballs.splice(i, 1);
 		}
 	}
+	// --- Upgrade UI logic ---
+	if (typeof upgradeUIShown === "undefined") upgradeUIShown = false;
+	if (typeof attackSpeedLevel === "undefined") attackSpeedLevel = 0;
+	if (typeof damageLevel === "undefined") damageLevel = 0;
+	if (typeof fireballDamage === "undefined") fireballDamage = 1;
+	if (typeof fireballCooldown === "undefined") fireballCooldown = 0;
+	if (typeof fireballCooldownBase === "undefined") fireballCooldownBase = 0;
+	if (!upgradeUIShown && score >= 10) {
+		// Pause enemy spawn
+		if (typeof enemySpawnTimer !== "undefined") LK.clearInterval(enemySpawnTimer);
+		// Create upgrade UI container
+		upgradeUIShown = true;
+		upgradeUI = new Container();
+		// Dim background
+		var dimBg = LK.getAsset('background', {
+			anchorX: 0,
+			anchorY: 0,
+			x: 0,
+			y: 0,
+			width: 2048,
+			height: 2732
+		});
+		dimBg.alpha = 0.7;
+		upgradeUI.addChild(dimBg);
+		// Attack speed button (left)
+		var atkBtn = LK.getAsset('upgrade_attack', {
+			anchorX: 0.5,
+			anchorY: 0.5,
+			x: 2048 / 2 - 350,
+			y: 2732 / 2
+		});
+		upgradeUI.addChild(atkBtn);
+		// Damage button (right)
+		var dmgBtn = LK.getAsset('upgrade_damage', {
+			anchorX: 0.5,
+			anchorY: 0.5,
+			x: 2048 / 2 + 350,
+			y: 2732 / 2
+		});
+		upgradeUI.addChild(dmgBtn);
+		// Attack speed label
+		var atkLabel = new Text2("Saldırı Hızı+", {
+			size: 70,
+			fill: "#fff"
+		});
+		atkLabel.anchor.set(0.5, 0);
+		atkLabel.x = atkBtn.x;
+		atkLabel.y = atkBtn.y + 140;
+		upgradeUI.addChild(atkLabel);
+		// Damage label
+		var dmgLabel = new Text2("Damage+", {
+			size: 70,
+			fill: "#fff"
+		});
+		dmgLabel.anchor.set(0.5, 0);
+		dmgLabel.x = dmgBtn.x;
+		dmgLabel.y = dmgBtn.y + 140;
+		upgradeUI.addChild(dmgLabel);
+		// Add to GUI overlay (centered)
+		LK.gui.center.addChild(upgradeUI);
+		// Button handlers
+		atkBtn.down = function (x, y, obj) {
+			attackSpeedLevel += 1;
+			// Lower fireball cooldown (minimum 200ms)
+			fireballCooldownBase = Math.max(200, 600 - attackSpeedLevel * 150);
+			// Remove UI
+			if (upgradeUI && upgradeUI.parent) upgradeUI.parent.removeChild(upgradeUI);
+			upgradeUI = null;
+			// Resume enemy spawn
+			enemySpawnTimer = LK.setInterval(function () {
+				spawnEnemy();
+			}, 1200);
+		};
+		dmgBtn.down = function (x, y, obj) {
+			damageLevel += 1;
+			fireballDamage = 2;
+			// Remove UI
+			if (upgradeUI && upgradeUI.parent) upgradeUI.parent.removeChild(upgradeUI);
+			upgradeUI = null;
+			// Resume enemy spawn
+			enemySpawnTimer = LK.setInterval(function () {
+				spawnEnemy();
+			}, 1200);
+		};
+	}
 	// Update enemies and remove destroyed ones
 	for (var j = enemies.length - 1; j >= 0; j--) {
 		var enemy = enemies[j];
 		if (enemy.update) enemy.update();
@@ -334,10 +416,10 @@
 			var fb = fireballs[k];
 			if (enemy['fb' + k + '_lastIntersecting'] === undefined) enemy['fb' + k + '_lastIntersecting'] = false;
 			var fbIntersect = enemy.intersects(fb);
 			if (!enemy['fb' + k + '_lastIntersecting'] && fbIntersect) {
-				// Decrease enemy health
-				enemy.health -= fb.damage || 1;
+				// Decrease enemy health by fireballDamage (default 1, 2 if upgraded)
+				enemy.health -= typeof fireballDamage !== "undefined" ? fireballDamage : 1;
 				// Destroy fireball
 				fb.destroy();
 				fireballs.splice(k, 1);
 				// If enemy health reaches 0, destroy enemy and increase score
@@ -345,128 +427,8 @@
 					enemy.destroy();
 					enemies.splice(j, 1);
 					score += 1;
 					scoreText.setText("Score: " + score);
-					// Show upgrade popup at score 10 (only once)
-					if (score === 10 && !upgradeActive) {
-						upgradeActive = true;
-						// Pause enemy spawn
-						LK.clearInterval(enemySpawnTimer);
-						// Create popup container
-						upgradePopup = new Container();
-						// Semi-transparent background
-						var popupBg = LK.getAsset('background', {
-							anchorX: 0,
-							anchorY: 0,
-							x: 0,
-							y: 0,
-							width: 2048,
-							height: 2732
-						});
-						popupBg.alpha = 0.7;
-						upgradePopup.addChild(popupBg);
-						// Title
-						var title = new Text2("Bir Yükseltme Seç!", {
-							size: 120,
-							fill: "#fff"
-						});
-						title.anchor.set(0.5, 0);
-						title.x = 2048 / 2;
-						title.y = 700;
-						upgradePopup.addChild(title);
-						// Attack Speed Option
-						var speedBtn = new Container();
-						var speedBg = LK.getAsset('background', {
-							anchorX: 0.5,
-							anchorY: 0.5,
-							x: 2048 / 2 - 350,
-							y: 1200,
-							width: 500,
-							height: 300
-						});
-						speedBg.alpha = 0.9;
-						speedBtn.addChild(speedBg);
-						var speedText = new Text2("Saldırı Hızı Artışı\n(Daha hızlı ateş et)", {
-							size: 60,
-							fill: "#fff"
-						});
-						speedText.anchor.set(0.5, 0.5);
-						speedText.x = 2048 / 2 - 350;
-						speedText.y = 1200;
-						speedBtn.addChild(speedText);
-						speedBtn.x = 0;
-						speedBtn.y = 0;
-						upgradePopup.addChild(speedBtn);
-						// Damage Option
-						var dmgBtn = new Container();
-						var dmgBg = LK.getAsset('background', {
-							anchorX: 0.5,
-							anchorY: 0.5,
-							x: 2048 / 2 + 350,
-							y: 1200,
-							width: 500,
-							height: 300
-						});
-						dmgBg.alpha = 0.9;
-						dmgBtn.addChild(dmgBg);
-						var dmgText = new Text2("Damage Artışı\n(Fireball daha güçlü)", {
-							size: 60,
-							fill: "#fff"
-						});
-						dmgText.anchor.set(0.5, 0.5);
-						dmgText.x = 2048 / 2 + 350;
-						dmgText.y = 1200;
-						dmgBtn.addChild(dmgText);
-						dmgBtn.x = 0;
-						dmgBtn.y = 0;
-						upgradePopup.addChild(dmgBtn);
-						// Add to overlay
-						LK.gui.center.addChild(upgradePopup);
-						// Option selection logic
-						// Use game.move to detect tap/click on buttons
-						var upgradeMoveHandler = function upgradeMoveHandler(x, y, obj) {
-							// Convert to GUI coordinates
-							var guiX = x,
-								guiY = y;
-							// Check if inside speedBtn
-							var sx = 2048 / 2 - 350,
-								sy = 1200;
-							if (guiX >= sx - 250 && guiX <= sx + 250 && guiY >= sy - 150 && guiY <= sy + 150) {
-								// Attack speed upgrade
-								fireballDelay = 8; // allow fireball every 8 ticks (~0.13s)
-								LK.gui.center.removeChild(upgradePopup);
-								upgradePopup = null;
-								// Resume enemy spawn
-								enemySpawnTimer = LK.setInterval(function () {
-									spawnEnemy();
-								}, 1200);
-								// Remove handler
-								game.move = originalMoveHandler;
-								upgradeActive = false;
-								return;
-							}
-							// Check if inside dmgBtn
-							var dx = 2048 / 2 + 350,
-								dy = 1200;
-							if (guiX >= dx - 250 && guiX <= dx + 250 && guiY >= dy - 150 && guiY <= dy + 150) {
-								// Damage upgrade
-								fireballDamage = 2;
-								LK.gui.center.removeChild(upgradePopup);
-								upgradePopup = null;
-								// Resume enemy spawn
-								enemySpawnTimer = LK.setInterval(function () {
-									spawnEnemy();
-								}, 1200);
-								// Remove handler
-								game.move = originalMoveHandler;
-								upgradeActive = false;
-								return;
-							}
-						};
-						// Save original move handler to restore later
-						var originalMoveHandler = game.move;
-						game.move = upgradeMoveHandler;
-					}
 					break;
 				}
 			}
 			enemy['fb' + k + '_lastIntersecting'] = fbIntersect;