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

/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 80;
	self.direction = {
		x: 0,
		y: 0
	};
	self.update = function () {
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
	};
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.health = 1;
	self.direction = {
		x: 0,
		y: 0
	};
	self.update = function () {
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.canShoot = false;
	return self;
});
var RhythmIndicator = Container.expand(function () {
	var self = Container.call(this);
	var rhythmBar = self.attachAsset('rhythmBar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var perfectZone = self.attachAsset('perfectZone', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	perfectZone.alpha = 0.7;
	var indicator = self.attachAsset('rhythmIndicator', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	indicator.x = -200;
	self.beatDuration = 1000;
	self.startTime = 0;
	self.update = function () {
		var elapsed = LK.ticks * (1000 / 60) - self.startTime;
		var progress = elapsed % self.beatDuration / self.beatDuration;
		indicator.x = -200 + progress * 400;
		var perfectZoneStart = 180;
		var perfectZoneEnd = 220;
		var indicatorPos = 200 + indicator.x;
		if (indicatorPos >= perfectZoneStart && indicatorPos <= perfectZoneEnd) {
			player.canShoot = true;
			perfectZone.tint = 0x27AE60;
		} else {
			player.canShoot = false;
			perfectZone.tint = 0xE67E22;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1A1A2E
});

/**** 
* Game Code
****/ 
var player = game.addChild(new Player());
player.x = 1024;
player.y = 2000;
var rhythmIndicator = game.addChild(new RhythmIndicator());
rhythmIndicator.x = 1024;
rhythmIndicator.y = 200;
rhythmIndicator.startTime = LK.ticks * (1000 / 60);
var enemies = [];
var bullets = [];
var spawnTimer = 0;
var gameSpeed = 1;
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var rhythmTxt = new Text2('Hit the beat!', {
	size: 40,
	fill: 0x27AE60
});
rhythmTxt.anchor.set(0.5, 0);
rhythmTxt.y = 80;
LK.gui.top.addChild(rhythmTxt);
function spawnEnemy() {
	var enemy = new Enemy();
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			enemy.x = Math.random() * 2048;
			enemy.y = -50;
			enemy.direction.x = (player.x - enemy.x) / 100;
			enemy.direction.y = 1;
			break;
		case 1:
			// Right
			enemy.x = 2098;
			enemy.y = Math.random() * 2732;
			enemy.direction.x = -1;
			enemy.direction.y = (player.y - enemy.y) / 100;
			break;
		case 2:
			// Bottom
			enemy.x = Math.random() * 2048;
			enemy.y = 2782;
			enemy.direction.x = (player.x - enemy.x) / 100;
			enemy.direction.y = -1;
			break;
		case 3:
			// Left
			enemy.x = -50;
			enemy.y = Math.random() * 2732;
			enemy.direction.x = 1;
			enemy.direction.y = (player.y - enemy.y) / 100;
			break;
	}
	var length = Math.sqrt(enemy.direction.x * enemy.direction.x + enemy.direction.y * enemy.direction.y);
	enemy.direction.x /= length;
	enemy.direction.y /= length;
	enemies.push(enemy);
	game.addChild(enemy);
}
function shootBullet(targetX, targetY) {
	if (!player.canShoot) {
		rhythmTxt.setText('Wrong timing!');
		rhythmTxt.tint = 0xE74C3C;
		return;
	}
	rhythmTxt.setText('Perfect!');
	rhythmTxt.tint = 0x27AE60;
	var bullet = new Bullet();
	bullet.x = player.x;
	bullet.y = player.y;
	var dx = targetX - bullet.x;
	var dy = targetY - bullet.y;
	var length = Math.sqrt(dx * dx + dy * dy);
	bullet.direction.x = dx / length;
	bullet.direction.y = dy / length;
	bullets.push(bullet);
	game.addChild(bullet);
	LK.getSound('shoot').play();
}
game.down = function (x, y, obj) {
	shootBullet(x, y);
};
game.update = function () {
	spawnTimer++;
	if (spawnTimer >= 120 / gameSpeed) {
		spawnEnemy();
		spawnTimer = 0;
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check bullet-enemy collisions
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				LK.setScore(LK.getScore() + 10);
				scoreTxt.setText('Score: ' + LK.getScore());
				LK.getSound('hit').play();
				LK.effects.flashObject(enemy, 0xFFFFFF, 200);
				bullet.destroy();
				bullets.splice(i, 1);
				enemy.destroy();
				enemies.splice(j, 1);
				break;
			}
		}
	}
	// Update enemies
	for (var k = enemies.length - 1; k >= 0; k--) {
		var enemy = enemies[k];
		if (enemy.intersects(player)) {
			LK.effects.flashScreen(0xFF0000, 1000);
			LK.showGameOver();
			return;
		}
		if (enemy.x < -100 || enemy.x > 2148 || enemy.y < -100 || enemy.y > 2832) {
			enemy.destroy();
			enemies.splice(k, 1);
		}
	}
	// Increase difficulty over time
	if (LK.getScore() > 0 && LK.getScore() % 100 === 0 && LK.ticks % 60 === 0) {
		gameSpeed += 0.1;
		rhythmIndicator.beatDuration = Math.max(600, rhythmIndicator.beatDuration - 50);
	}
};
LK.playMusic('bgmusic');

===================================================================
--- original.js
+++ change.js
@@ -11,9 +11,9 @@
 	var bulletGraphics = self.attachAsset('bullet', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.speed = 8;
+	self.speed = 80;
 	self.direction = {
 		x: 0,
 		y: 0
 	};
@@ -22,17 +22,8 @@
 		self.y += self.direction.y * self.speed;
 	};
 	return self;
 });
-var Crosshair = Container.expand(function () {
-	var self = Container.call(this);
-	var crosshairGraphics = self.attachAsset('crosshair', {
-		anchorX: 0.5,
-		anchorY: 0.5
-	});
-	crosshairGraphics.alpha = 0.7;
-	return self;
-});
 var Enemy = Container.expand(function () {
 	var self = Container.call(this);
 	var enemyGraphics = self.attachAsset('enemy', {
 		anchorX: 0.5,
@@ -107,11 +98,8 @@
 ****/ 
 var player = game.addChild(new Player());
 player.x = 1024;
 player.y = 2000;
-var crosshair = game.addChild(new Crosshair());
-crosshair.x = 1024;
-crosshair.y = 1366;
 var rhythmIndicator = game.addChild(new RhythmIndicator());
 rhythmIndicator.x = 1024;
 rhythmIndicator.y = 200;
 rhythmIndicator.startTime = LK.ticks * (1000 / 60);
@@ -190,14 +178,10 @@
 	bullets.push(bullet);
 	game.addChild(bullet);
 	LK.getSound('shoot').play();
 }
-game.move = function (x, y, obj) {
-	crosshair.x = x;
-	crosshair.y = y;
-};
 game.down = function (x, y, obj) {
-	shootBullet(crosshair.x, crosshair.y);
+	shootBullet(x, y);
 };
 game.update = function () {
 	spawnTimer++;
 	if (spawnTimer >= 120 / gameSpeed) {