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

/**** 
* Classes
****/ 
// Beam item class
var BeamItem = Container.expand(function () {
	var self = Container.call(this);
	var beamSprite = self.attachAsset('enemy1', {
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x2196f3 // blue
	});
	beamSprite.width = 90;
	beamSprite.height = 90;
	self.update = function () {
		self.y += 12;
	};
	return self;
});
// Enemy type 1: moves straight down
var Enemy1 = Container.expand(function () {
	var self = Container.call(this);
	var enemySprite = self.attachAsset('enemy1', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8 + Math.random() * 4;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Enemy type 2: moves in sine wave
var Enemy2 = Container.expand(function () {
	var self = Container.call(this);
	var enemySprite = self.attachAsset('enemy2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 7 + Math.random() * 3;
	self.waveAmplitude = 120 + Math.random() * 80;
	self.waveSpeed = 0.02 + Math.random() * 0.01;
	self.baseX = 0;
	self.t = 0;
	self.update = function () {
		self.y += self.speed;
		self.t += self.waveSpeed;
		self.x = self.baseX + Math.sin(self.t * 6.28) * self.waveAmplitude;
	};
	return self;
});
// Enemy bullet class
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletSprite = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = 0;
	self.speedY = 16;
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
	};
	return self;
});
// Hero class
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroSprite = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = heroSprite.width / 2;
	self.shootCooldown = 0;
	self.update = function () {
		if (self.shootCooldown > 0) self.shootCooldown--;
	};
	return self;
});
// Hero bullet class
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletSprite = self.attachAsset('heroBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -32;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Shield item class
var ShieldItem = Container.expand(function () {
	var self = Container.call(this);
	var shieldSprite = self.attachAsset('enemy2', {
		anchorX: 0.5,
		anchorY: 0.5,
		tint: 0x80eaff // light blue
	});
	shieldSprite.width = 90;
	shieldSprite.height = 90;
	self.update = function () {
		self.y += 12;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181818
});

/**** 
* Game Code
****/ 
// Play background music
// Hero asset: blue box
// Hero bullet: yellow ellipse
// Enemy type 1: red box
// Enemy type 2: green ellipse
// Enemy bullet: orange ellipse
// Sound for shooting
// Music
LK.playMusic('bgmusic');
// Score display
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Game variables
var hero = new Hero();
game.addChild(hero);
hero.x = 2048 / 2;
hero.y = 2732 - 350;
// Ulti button UI and state
var ultiReady = true;
var ultiCooldown = 0;
var ultiCooldownMax = 1800; // 30 seconds at 60fps
// Create ulti button
var ultiBtn = new Text2("ULTI", {
	size: 90,
	fill: 0x00EAFF,
	fontWeight: "bold"
});
ultiBtn.anchor.set(0.5, 0.5);
ultiBtn.x = 2048 - 200;
ultiBtn.y = 2732 - 200;
ultiBtn.bg = LK.getAsset('enemy2', {
	anchorX: 0.5,
	anchorY: 0.5,
	tint: 0x00eaff
});
ultiBtn.bg.width = 220;
ultiBtn.bg.height = 140;
ultiBtn.bg.alpha = 0.25;
ultiBtn.bg.x = ultiBtn.x;
ultiBtn.bg.y = ultiBtn.y;
game.addChild(ultiBtn.bg);
game.addChild(ultiBtn);
// Ulti button cooldown overlay
var ultiBtnOverlay = LK.getAsset('enemy2', {
	anchorX: 0.5,
	anchorY: 0.5,
	tint: 0x222222
});
ultiBtnOverlay.width = 220;
ultiBtnOverlay.height = 140;
ultiBtnOverlay.alpha = 0.55;
ultiBtnOverlay.x = ultiBtn.x;
ultiBtnOverlay.y = ultiBtn.y;
ultiBtnOverlay.visible = false;
game.addChild(ultiBtnOverlay);
// Armor visual overlay for shield
var heroArmor = LK.getAsset('enemy2', {
	anchorX: 0.5,
	anchorY: 0.5,
	tint: 0x80eaff // light blue
});
heroArmor.width = hero.width * 1.35;
heroArmor.height = hero.height * 1.35;
heroArmor.alpha = 0.55;
heroArmor.visible = false;
game.addChild(heroArmor);
var heroBullets = [];
var enemies = [];
var enemyBullets = [];
var items = [];
var dragNode = null;
var lastHeroIntersecting = false;
var score = 0;
var spawnTick = 0;
var enemyShootTick = 0;
// Powerup state
var shieldActive = false;
var shieldTimer = 0;
var beamActive = false;
var beamTimer = 0;
// Helper: spawn item
function spawnItem() {
	var itemType = Math.random() < 0.5 ? "shield" : "beam";
	var item;
	if (itemType === "shield") {
		item = new ShieldItem();
	} else {
		item = new BeamItem();
	}
	item.x = 200 + Math.random() * (2048 - 400);
	item.y = -80;
	items.push(item);
	game.addChild(item);
}
// Helper: spawn enemy
function spawnEnemy() {
	var type = Math.random() < 0.5 ? 1 : 2;
	var enemy;
	if (type === 1) {
		enemy = new Enemy1();
		enemy.x = 200 + Math.random() * (2048 - 400);
		enemy.y = -80;
	} else {
		enemy = new Enemy2();
		enemy.baseX = 200 + Math.random() * (2048 - 400);
		enemy.x = enemy.baseX;
		enemy.y = -80;
		enemy.t = Math.random() * 2;
	}
	enemies.push(enemy);
	game.addChild(enemy);
}
// Helper: spawn enemy bullet
function spawnEnemyBullet(enemy, targetX, targetY) {
	var bullet = new EnemyBullet();
	bullet.x = enemy.x;
	bullet.y = enemy.y + 60;
	// Aim at hero
	var dx = targetX - bullet.x;
	var dy = targetY - bullet.y;
	var len = Math.sqrt(dx * dx + dy * dy);
	if (len > 0) {
		bullet.speedX = dx / len * 18;
		bullet.speedY = dy / len * 18;
	}
	enemyBullets.push(bullet);
	game.addChild(bullet);
	LK.getSound('enemyShoot').play();
}
// Move handler for dragging hero
function handleMove(x, y, obj) {
	if (dragNode) {
		// Clamp hero inside screen
		var hw = dragNode.width / 2;
		var hh = dragNode.height / 2;
		var nx = Math.max(hw, Math.min(2048 - hw, x));
		var ny = Math.max(hh + 100, Math.min(2732 - hh, y));
		dragNode.x = nx;
		dragNode.y = ny;
	}
}
// Touch down: start dragging hero
game.down = function (x, y, obj) {
	// Only allow drag if touch is on hero
	var local = hero.toLocal(game.toGlobal({
		x: x,
		y: y
	}));
	if (Math.abs(local.x) <= hero.width / 2 && Math.abs(local.y) <= hero.height / 2) {
		dragNode = hero;
	}
};
// Touch up: stop dragging
game.up = function (x, y, obj) {
	dragNode = null;
};
// Touch move: move hero
game.move = function (x, y, obj) {
	handleMove(x, y, obj);
	// Handle ulti button press (touch/click)
	if (ultiReady) {
		// Check if touch is inside ulti button area
		var dx = x - ultiBtn.x;
		var dy = y - ultiBtn.y;
		if (Math.abs(dx) <= ultiBtn.bg.width / 2 && Math.abs(dy) <= ultiBtn.bg.height / 2) {
			// Activate ulti
			ultiReady = false;
			ultiCooldown = ultiCooldownMax;
			ultiBtnOverlay.visible = true;
			// Ulti effect: clear all enemies and enemy bullets
			for (var i = enemies.length - 1; i >= 0; i--) {
				enemies[i].destroy();
				enemies.splice(i, 1);
			}
			for (var i = enemyBullets.length - 1; i >= 0; i--) {
				enemyBullets[i].destroy();
				enemyBullets.splice(i, 1);
			}
			LK.effects.flashScreen(0x00eaff, 600);
		}
	}
};
// Main game update
game.update = function () {
	// Update hero
	hero.update();
	// Ulti cooldown logic
	if (!ultiReady) {
		ultiCooldown--;
		if (ultiCooldown <= 0) {
			ultiReady = true;
			ultiBtnOverlay.visible = false;
		} else {
			// Show overlay and update text to show seconds left
			ultiBtnOverlay.visible = true;
			ultiBtn.text = "ULTI\n" + Math.ceil(ultiCooldown / 60) + "s";
		}
	}
	if (ultiReady) {
		ultiBtn.text = "ULTI";
		ultiBtnOverlay.visible = false;
	}
	// Update armor overlay position and visibility
	heroArmor.x = hero.x;
	heroArmor.y = hero.y;
	heroArmor.visible = shieldActive;
	// Update shield/beam timers
	if (shieldActive) {
		shieldTimer--;
		if (shieldTimer <= 0) {
			shieldActive = false;
		}
	}
	if (beamActive) {
		beamTimer--;
		if (beamTimer <= 0) {
			beamActive = false;
		}
	}
	// Update items (powerups)
	for (var i = items.length - 1; i >= 0; i--) {
		var item = items[i];
		item.update();
		// Remove if off screen
		if (item.y > 2732 + 100) {
			item.destroy();
			items.splice(i, 1);
			continue;
		}
		// Pickup by hero
		if (item.intersects(hero)) {
			if (item instanceof ShieldItem) {
				shieldActive = true;
				shieldTimer = 360; // 6 seconds at 60fps
				LK.effects.flashObject(hero, 0x00ffff, 400);
			} else if (item instanceof BeamItem) {
				beamActive = true;
				beamTimer = 180; // 3 seconds at 60fps
				LK.effects.flashObject(hero, 0xff00ff, 400);
			}
			item.destroy();
			items.splice(i, 1);
			continue;
		}
	}
	// Hero shooting (auto-fire)
	if (hero.shootCooldown <= 0) {
		if (beamActive) {
			// Beam: fire 3 bullets in spread
			for (var bdir = -1; bdir <= 1; bdir++) {
				var bullet = new HeroBullet();
				bullet.x = hero.x + bdir * 40;
				bullet.y = hero.y - hero.height / 2 - 20;
				bullet.spread = bdir * 0.18; // radians
				bullet.update = function (origUpdate, spread) {
					return function () {
						this.y += this.speed;
						this.x += Math.sin(spread) * 18;
					};
				}(bullet.update, bullet.spread);
				heroBullets.push(bullet);
				game.addChild(bullet);
			}
			hero.shootCooldown = 6;
			LK.getSound('shoot').play();
		} else {
			var bullet = new HeroBullet();
			bullet.x = hero.x;
			bullet.y = hero.y - hero.height / 2 - 20;
			heroBullets.push(bullet);
			game.addChild(bullet);
			hero.shootCooldown = 10;
			LK.getSound('shoot').play();
		}
	}
	// Update hero bullets
	for (var i = heroBullets.length - 1; i >= 0; i--) {
		var b = heroBullets[i];
		b.update();
		// Remove if off screen
		if (b.y < -60) {
			b.destroy();
			heroBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var e = enemies[j];
			if (b.intersects(e)) {
				// Enemy hit
				LK.getSound('enemyHit').play();
				score += 1;
				scoreTxt.setText(score);
				// Flash enemy
				LK.effects.flashObject(e, 0xffffff, 200);
				// Remove both
				b.destroy();
				heroBullets.splice(i, 1);
				e.destroy();
				enemies.splice(j, 1);
				break;
			}
		}
	}
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var e = enemies[i];
		e.update();
		// Remove if off screen
		if (e.y > 2732 + 100) {
			e.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Enemy shoots randomly
		if (Math.random() < 0.008) {
			spawnEnemyBullet(e, hero.x, hero.y);
		}
		// Check collision with hero
		if (e.intersects(hero)) {
			if (!shieldActive) {
				// Hero hit
				LK.getSound('heroHit').play();
				LK.effects.flashScreen(0xff0000, 800);
				LK.showGameOver();
				return;
			} else {
				// Shield absorbs hit, destroy enemy
				LK.effects.flashObject(hero, 0x00ffff, 200);
				e.destroy();
				enemies.splice(i, 1);
				continue;
			}
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var b = enemyBullets[i];
		b.update();
		// Remove if off screen
		if (b.y < -60 || b.y > 2732 + 60 || b.x < -60 || b.x > 2048 + 60) {
			b.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with hero
		if (b.intersects(hero)) {
			if (!shieldActive) {
				LK.getSound('heroHit').play();
				LK.effects.flashScreen(0xff0000, 800);
				LK.showGameOver();
				return;
			} else {
				// Shield absorbs bullet
				LK.effects.flashObject(hero, 0x00ffff, 120);
				b.destroy();
				enemyBullets.splice(i, 1);
				continue;
			}
		}
	}
	// Spawn enemies
	spawnTick++;
	var spawnInterval = Math.max(18, 60 - Math.floor(score / 10) * 4); // Faster as score increases
	if (spawnTick >= spawnInterval) {
		// Calculate how many enemies to spawn based on score (1 + 1 per 50 score)
		var numEnemies = 1 + Math.floor(score / 50);
		for (var i = 0; i < numEnemies; i++) {
			spawnEnemy();
		}
		// 1 in 8 chance to spawn an item
		if (Math.random() < 0.125) {
			spawnItem();
		}
		spawnTick = 0;
	}
};

===================================================================
--- original.js
+++ change.js
@@ -141,8 +141,46 @@
 var hero = new Hero();
 game.addChild(hero);
 hero.x = 2048 / 2;
 hero.y = 2732 - 350;
+// Ulti button UI and state
+var ultiReady = true;
+var ultiCooldown = 0;
+var ultiCooldownMax = 1800; // 30 seconds at 60fps
+// Create ulti button
+var ultiBtn = new Text2("ULTI", {
+	size: 90,
+	fill: 0x00EAFF,
+	fontWeight: "bold"
+});
+ultiBtn.anchor.set(0.5, 0.5);
+ultiBtn.x = 2048 - 200;
+ultiBtn.y = 2732 - 200;
+ultiBtn.bg = LK.getAsset('enemy2', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	tint: 0x00eaff
+});
+ultiBtn.bg.width = 220;
+ultiBtn.bg.height = 140;
+ultiBtn.bg.alpha = 0.25;
+ultiBtn.bg.x = ultiBtn.x;
+ultiBtn.bg.y = ultiBtn.y;
+game.addChild(ultiBtn.bg);
+game.addChild(ultiBtn);
+// Ulti button cooldown overlay
+var ultiBtnOverlay = LK.getAsset('enemy2', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	tint: 0x222222
+});
+ultiBtnOverlay.width = 220;
+ultiBtnOverlay.height = 140;
+ultiBtnOverlay.alpha = 0.55;
+ultiBtnOverlay.x = ultiBtn.x;
+ultiBtnOverlay.y = ultiBtn.y;
+ultiBtnOverlay.visible = false;
+game.addChild(ultiBtnOverlay);
 // Armor visual overlay for shield
 var heroArmor = LK.getAsset('enemy2', {
 	anchorX: 0.5,
 	anchorY: 0.5,
@@ -245,13 +283,51 @@
 };
 // Touch move: move hero
 game.move = function (x, y, obj) {
 	handleMove(x, y, obj);
+	// Handle ulti button press (touch/click)
+	if (ultiReady) {
+		// Check if touch is inside ulti button area
+		var dx = x - ultiBtn.x;
+		var dy = y - ultiBtn.y;
+		if (Math.abs(dx) <= ultiBtn.bg.width / 2 && Math.abs(dy) <= ultiBtn.bg.height / 2) {
+			// Activate ulti
+			ultiReady = false;
+			ultiCooldown = ultiCooldownMax;
+			ultiBtnOverlay.visible = true;
+			// Ulti effect: clear all enemies and enemy bullets
+			for (var i = enemies.length - 1; i >= 0; i--) {
+				enemies[i].destroy();
+				enemies.splice(i, 1);
+			}
+			for (var i = enemyBullets.length - 1; i >= 0; i--) {
+				enemyBullets[i].destroy();
+				enemyBullets.splice(i, 1);
+			}
+			LK.effects.flashScreen(0x00eaff, 600);
+		}
+	}
 };
 // Main game update
 game.update = function () {
 	// Update hero
 	hero.update();
+	// Ulti cooldown logic
+	if (!ultiReady) {
+		ultiCooldown--;
+		if (ultiCooldown <= 0) {
+			ultiReady = true;
+			ultiBtnOverlay.visible = false;
+		} else {
+			// Show overlay and update text to show seconds left
+			ultiBtnOverlay.visible = true;
+			ultiBtn.text = "ULTI\n" + Math.ceil(ultiCooldown / 60) + "s";
+		}
+	}
+	if (ultiReady) {
+		ultiBtn.text = "ULTI";
+		ultiBtnOverlay.visible = false;
+	}
 	// Update armor overlay position and visibility
 	heroArmor.x = hero.x;
 	heroArmor.y = hero.y;
 	heroArmor.visible = shieldActive;