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

/**** 
* Classes
****/ 
// --- Enemy Class ---
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	// Enemy asset: red ellipse
	var enemyAsset = self.attachAsset('enemy', {
		width: 100,
		height: 100,
		color: 0xd83318,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = 50;
	self.speed = 4 + Math.random() * 2; // randomize speed a bit
	self.state = 'idle'; // 'idle' or 'chase'
	self.radarRadius = 400; // detection radius
	self.target = null; // player
	// For hit flash
	self.flashTicks = 0;
	self.update = function () {
		if (!self.target) return;
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		// Radar detection
		if (self.state === 'idle' && dist < self.radarRadius) {
			self.state = 'chase';
		}
		// Move if chasing
		if (self.state === 'chase') {
			if (dist > 5) {
				var moveX = dx / dist * self.speed;
				var moveY = dy / dist * self.speed;
				self.x += moveX;
				self.y += moveY;
			}
		}
		// Flash on hit
		if (self.flashTicks > 0) {
			self.flashTicks--;
			enemyAsset.tint = 0xffff00;
		} else {
			enemyAsset.tint = 0xd83318;
		}
	};
	// Called when hit by sword
	self.hit = function () {
		self.flashTicks = 6;
	};
	return self;
});
// --- Player Class ---
var Player = Container.expand(function () {
	var self = Container.call(this);
	// Player asset: a colored ellipse (body)
	var body = self.attachAsset('player', {
		width: 120,
		height: 120,
		color: 0x2e86de,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Sword child
	self.sword = new Sword();
	self.addChild(self.sword);
	self.sword.x = 0;
	self.sword.y = 0;
	self.radius = 60; // for collision
	// For dragging
	self.isDragging = false;
	// For invulnerability after hit
	self.invulnTicks = 0;
	// Called every tick
	self.update = function () {
		if (self.invulnTicks > 0) {
			self.invulnTicks--;
			body.alpha = LK.ticks % 10 < 5 ? 0.5 : 1;
		} else {
			body.alpha = 1;
		}
		// Make sword(s) rotate much faster and support multiple swords
		if (!self.sword.swinging) {
			// Sword speed multiplier (default 0.18, can be upgraded)
			if (typeof self.swordSpeed === "undefined") self.swordSpeed = 0.18;
			// Number of swords (default 1, can be upgraded)
			if (typeof self.swordCount === "undefined") self.swordCount = 1;
			for (var i = 0; i < self.swordCount; i++) {
				var angle = (LK.ticks * self.swordSpeed + Math.PI * 2 * i / self.swordCount) % (Math.PI * 2);
				if (i === 0) {
					self.sword.rotation = angle;
				} else {
					// Add extra swords if not already present
					if (!self.extraSwords) self.extraSwords = [];
					if (!self.extraSwords[i - 1]) {
						var newSword = new Sword();
						self.addChild(newSword);
						newSword.x = 0;
						newSword.y = 0;
						self.extraSwords[i - 1] = newSword;
					}
					self.extraSwords[i - 1].rotation = angle;
				}
			}
			// Remove extra swords if swordCount decreased
			if (self.extraSwords && self.extraSwords.length > self.swordCount - 1) {
				for (var j = self.swordCount - 1; j < self.extraSwords.length; j++) {
					self.extraSwords[j].destroy();
				}
				self.extraSwords.length = self.swordCount - 1;
			}
		}
	};
	// Start sword swing
	self.attack = function (onFinish) {
		self.sword.swing(onFinish);
	};
	return self;
});
// --- Sword Class ---
var Sword = Container.expand(function () {
	var self = Container.call(this);
	// Sword asset: a long, thin rectangle (box)
	var swordAsset = self.attachAsset('sword', {
		width: 40,
		height: 220,
		color: 0xffffff,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.9 // handle is at bottom
	});
	self.swinging = false;
	self.swingAngle = 0; // in radians
	// Called every tick
	self.update = function () {
		// If swinging, animate the sword
		if (self.swinging) {
			self.rotation = self.swingAngle;
		}
	};
	// Start a sword swing animation
	self.swing = function (_onFinish) {
		// Sword is always rotating, so swing does nothing
		if (_onFinish) _onFinish();
	};
	return self;
});
// --- Upgrader Class ---
var Upgrader = Container.expand(function () {
	var self = Container.call(this);
	// Randomly choose upgrade type
	var types = [{
		type: "speed",
		color: 0x00ffcc
	}, {
		type: "multi",
		color: 0xffcc00
	}];
	var chosen = types[Math.floor(Math.random() * types.length)];
	self.upgradeType = chosen.type;
	// Visual: colored ellipse
	var asset = self.attachAsset('centerCircle', {
		width: 90,
		height: 90,
		color: chosen.color,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Animate (pulse)
	tween(asset, {
		scaleX: 1.2,
		scaleY: 1.2
	}, {
		duration: 600,
		easing: tween.linear,
		onFinish: function onFinish() {
			// Reverse pulse for yoyo effect
			tween(asset, {
				scaleX: 1.0,
				scaleY: 1.0
			}, {
				duration: 600,
				easing: tween.linear,
				onFinish: function onFinish() {
					// Repeat indefinitely
					if (asset && asset.parent) {
						// Only repeat if still in scene
						// Use setTimeout to avoid call stack overflow
						LK.setTimeout(function () {
							if (asset && asset.parent) {
								// Restart pulse
								tween(asset, {
									scaleX: 1.2,
									scaleY: 1.2
								}, {
									duration: 600,
									easing: tween.linear,
									onFinish: arguments.callee
								});
							}
						}, 0);
					}
				}
			});
		}
	});
	asset.scaleX = 1.0;
	asset.scaleY = 1.0;
	// For collision
	self.radius = 45;
	// Lifetime (10s default)
	self.lifetime = 600 + Math.floor(Math.random() * 600); // 10-20s
	self.update = function () {
		self.lifetime--;
		if (self.lifetime <= 0) {
			self.destroy();
			if (typeof upgraders !== "undefined") {
				var idx = upgraders.indexOf(self);
				if (idx !== -1) upgraders.splice(idx, 1);
			}
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// --- Game Variables ---
var player;
var enemies = [];
var upgraders = [];
var maxEnemies = 6;
var spawnAreaMargin = 200;
var score = 0;
var lives = 3;
var scoreTxt, livesTxt;
var dragNode = null;
var lastTouch = {
	x: 0,
	y: 0
};
var swordHitCooldown = 0;
// Upgrader spawn timer
var nextUpgraderTick = LK.ticks + 60 * (2 + Math.random() * 28); // 2-30s
// --- UI Setup ---
scoreTxt = new Text2('Skor: 0', {
	size: 100,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
livesTxt = new Text2('Can: 3', {
	size: 80,
	fill: "#fff"
});
livesTxt.anchor.set(1, 0);
livesTxt.x = -40; // right margin
LK.gui.topRight.addChild(livesTxt);
// --- Player Setup ---
player = new Player();
player.x = 2048 / 2;
player.y = 2732 * 0.7;
game.addChild(player);
// --- Enemy Spawning ---
function spawnEnemy() {
	var enemy = new Enemy();
	enemy.target = player;
	// Spawn at random edge
	var edge = Math.floor(Math.random() * 4);
	var x, y;
	if (edge === 0) {
		// top
		x = spawnAreaMargin + Math.random() * (2048 - 2 * spawnAreaMargin);
		y = spawnAreaMargin;
	} else if (edge === 1) {
		// bottom
		x = spawnAreaMargin + Math.random() * (2048 - 2 * spawnAreaMargin);
		y = 2732 - spawnAreaMargin;
	} else if (edge === 2) {
		// left
		x = spawnAreaMargin;
		y = spawnAreaMargin + Math.random() * (2732 - 2 * spawnAreaMargin);
	} else {
		// right
		x = 2048 - spawnAreaMargin;
		y = spawnAreaMargin + Math.random() * (2732 - 2 * spawnAreaMargin);
	}
	enemy.x = x;
	enemy.y = y;
	enemies.push(enemy);
	game.addChild(enemy);
}
// Initial enemies
for (var i = 0; i < maxEnemies; i++) {
	spawnEnemy();
}
// --- Touch/Drag Controls ---
game.down = function (x, y, obj) {
	// Only drag if touch is on player
	var dx = x - player.x;
	var dy = y - player.y;
	if (dx * dx + dy * dy < player.radius * player.radius) {
		dragNode = player;
		lastTouch.x = x;
		lastTouch.y = y;
	}
};
game.move = function (x, y, obj) {
	if (dragNode === player) {
		// Clamp to game area
		var nx = Math.max(player.radius, Math.min(2048 - player.radius, x));
		var ny = Math.max(player.radius, Math.min(2732 - player.radius, y));
		player.x = nx;
		player.y = ny;
		lastTouch.x = x;
		lastTouch.y = y;
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// --- Sword Attack (Tap anywhere except player) ---
game.tapCooldown = 0;
game.downSword = function (x, y, obj) {
	// If not dragging player, swing sword
	var dx = x - player.x;
	var dy = y - player.y;
	// Sword now rotates automatically; manual swing disabled
};
// Listen for down events for sword attack
game.on('down', function (x, y, obj) {
	game.downSword(x, y, obj);
});
// --- Game Update Loop ---
game.update = function () {
	player.update();
	// --- Upgrader spawn logic ---
	if (LK.ticks >= nextUpgraderTick) {
		// Spawn upgrader at random position (not too close to player)
		var tries = 0;
		var ux, uy;
		do {
			ux = 200 + Math.random() * (2048 - 400);
			uy = 200 + Math.random() * (2732 - 400);
			tries++;
		} while (tries < 10 && Math.sqrt((ux - player.x) * (ux - player.x) + (uy - player.y) * (uy - player.y)) < 300);
		var upgrader = new Upgrader();
		upgrader.x = ux;
		upgrader.y = uy;
		upgraders.push(upgrader);
		game.addChild(upgrader);
		// Next spawn in 2-30s
		nextUpgraderTick = LK.ticks + 60 * (2 + Math.random() * 28);
	}
	// --- Upgrader update and collision ---
	for (var u = upgraders.length - 1; u >= 0; u--) {
		var upgrader = upgraders[u];
		if (upgrader.update) upgrader.update();
		// Check collision with player
		var dxu = upgrader.x - player.x;
		var dyu = upgrader.y - player.y;
		var distu = Math.sqrt(dxu * dxu + dyu * dyu);
		if (distu < player.radius + upgrader.radius) {
			// Apply upgrade
			if (upgrader.upgradeType === "speed") {
				if (typeof player.swordSpeed === "undefined") player.swordSpeed = 0.18;
				player.swordSpeed *= 1.4;
				LK.effects.flashObject(player.sword, 0x00ffcc, 400);
			} else if (upgrader.upgradeType === "multi") {
				if (typeof player.swordCount === "undefined") player.swordCount = 1;
				player.swordCount = Math.min(player.swordCount + 1, 5);
				LK.effects.flashObject(player.sword, 0xffcc00, 400);
			}
			// Remove upgrader
			upgrader.destroy();
			upgraders.splice(u, 1);
		}
	}
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		enemy.update();
		// Check collision: enemy with player
		var dx = enemy.x - player.x;
		var dy = enemy.y - player.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < enemy.radius + player.radius - 10) {
			// Only if not invulnerable
			if (player.invulnTicks === 0) {
				lives--;
				livesTxt.setText('Can: ' + lives);
				player.invulnTicks = 60;
				LK.effects.flashObject(player, 0xff0000, 600);
				if (lives <= 0) {
					LK.effects.flashScreen(0xff0000, 1000);
					LK.showGameOver();
					return;
				}
			}
		}
		// Check collision: enemy with sword(s)
		var swordLen = player.sword.height * 0.9;
		var hit = false;
		// Check all swords
		var swordAngles = [player.sword.rotation];
		if (player.extraSwords) {
			for (var si = 0; si < player.extraSwords.length; si++) {
				swordAngles.push(player.extraSwords[si].rotation);
			}
		}
		for (var sa = 0; sa < swordAngles.length; sa++) {
			var angle = swordAngles[sa];
			var tipX = player.x + Math.sin(angle) * swordLen;
			var tipY = player.y - Math.cos(angle) * swordLen;
			var sdx = enemy.x - tipX;
			var sdy = enemy.y - tipY;
			var sdist = Math.sqrt(sdx * sdx + sdy * sdy);
			if (sdist < enemy.radius + 30) {
				hit = true;
				break;
			}
		}
		if (hit) {
			// Enemy hit!
			score++;
			scoreTxt.setText('Skor: ' + score);
			enemy.hit();
			LK.effects.flashObject(enemy, 0xffff00, 200);
			// --- Upgrader spawn on every 2 kills ---
			if (typeof killsSinceLastUpgrader === "undefined") killsSinceLastUpgrader = 0;
			killsSinceLastUpgrader++;
			if (killsSinceLastUpgrader >= 2) {
				killsSinceLastUpgrader = 0;
				// Spawn upgrader at enemy's death position
				var upgrader = new Upgrader();
				upgrader.x = enemy.x;
				upgrader.y = enemy.y;
				upgraders.push(upgrader);
				game.addChild(upgrader);
			}
			enemy.destroy();
			enemies.splice(i, 1);
			// Spawn new enemy
			LK.setTimeout(function () {
				if (enemies.length < maxEnemies) spawnEnemy();
			}, 400);
			// Win condition
			if (score >= 30) {
				LK.showYouWin();
				return;
			}
		}
	}
	// Sword cooldown removed; sword rotates automatically
	// Keep enemy count
	if (enemies.length < maxEnemies && LK.ticks % 90 === 0) {
		spawnEnemy();
	}
};
// --- Prevent UI Overlap (top left 100x100) ---
player.x = Math.max(player.x, 160);
player.y = Math.max(player.y, 160);

===================================================================
--- original.js
+++ change.js
@@ -441,8 +441,20 @@
 			score++;
 			scoreTxt.setText('Skor: ' + score);
 			enemy.hit();
 			LK.effects.flashObject(enemy, 0xffff00, 200);
+			// --- Upgrader spawn on every 2 kills ---
+			if (typeof killsSinceLastUpgrader === "undefined") killsSinceLastUpgrader = 0;
+			killsSinceLastUpgrader++;
+			if (killsSinceLastUpgrader >= 2) {
+				killsSinceLastUpgrader = 0;
+				// Spawn upgrader at enemy's death position
+				var upgrader = new Upgrader();
+				upgrader.x = enemy.x;
+				upgrader.y = enemy.y;
+				upgraders.push(upgrader);
+				game.addChild(upgrader);
+			}
 			enemy.destroy();
 			enemies.splice(i, 1);
 			// Spawn new enemy
 			LK.setTimeout(function () {