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

/**** 
* Classes
****/ 
var Block = Container.expand(function () {
	var self = Container.call(this);
	var blockGraphics = self.attachAsset('block', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.hitByBullet = false;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.update = function () {
		self.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
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a2e
});

/**** 
* Game Code
****/ 
// Game variables
var player;
var bullets = [];
var blocks = [];
var beatIndicator;
var scoreMultiplier = 1;
var consecutiveBeats = 0;
var beatTolerance = 200; // milliseconds
var lastBeatTime = 0;
var beatInterval = 600; // milliseconds (100 BPM)
var nextBlockSpawn = 0;
var blockSpawnInterval = 1200;
var gameStartTime;
var beatFlashDuration = 100;
// UI Elements
var scoreText = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0, 0);
scoreText.x = 120;
scoreText.y = 50;
LK.gui.topLeft.addChild(scoreText);
var multiplierText = new Text2('x1', {
	size: 50,
	fill: 0x00FF00
});
multiplierText.anchor.set(1, 0);
multiplierText.x = -120;
multiplierText.y = 50;
LK.gui.topRight.addChild(multiplierText);
// Initialize player
player = game.addChild(new Player());
player.x = 1024;
player.y = 2500;
// Beat indicator
beatIndicator = game.addChild(LK.getAsset('beatIndicator', {
	anchorX: 0.5,
	anchorY: 0.5,
	alpha: 0.3
}));
beatIndicator.x = 1024;
beatIndicator.y = 2600;
// Start music and initialize game timer
LK.playMusic('gameMusic');
gameStartTime = Date.now();
function isOnBeat() {
	var currentTime = Date.now() - gameStartTime;
	var timeSinceLastBeat = currentTime % beatInterval;
	return timeSinceLastBeat < beatTolerance || timeSinceLastBeat > beatInterval - beatTolerance;
}
function flashBeatIndicator() {
	beatIndicator.alpha = 1;
	tween(beatIndicator, {
		alpha: 0.3
	}, {
		duration: beatFlashDuration
	});
	tween(beatIndicator, {
		scaleX: 1.3,
		scaleY: 1.3
	}, {
		duration: beatFlashDuration / 2
	});
	tween(beatIndicator, {
		scaleX: 1,
		scaleY: 1
	}, {
		duration: beatFlashDuration / 2
	});
}
function updateScore(points, onBeat) {
	var finalPoints = points;
	if (onBeat) {
		finalPoints *= 2;
		consecutiveBeats++;
		scoreMultiplier = Math.min(1 + Math.floor(consecutiveBeats / 3), 5);
		multiplierText.setText('x' + scoreMultiplier);
		multiplierText.tint = 0x00ff00;
		tween(multiplierText, {
			tint: 0xffffff
		}, {
			duration: 300
		});
	} else {
		consecutiveBeats = 0;
		scoreMultiplier = 1;
		multiplierText.setText('x1');
	}
	finalPoints *= scoreMultiplier;
	LK.setScore(LK.getScore() + finalPoints);
	scoreText.setText('Score: ' + LK.getScore());
}
function spawnBlock() {
	var block = new Block();
	block.x = Math.random() * 1600 + 224; // Random x position within screen bounds
	block.y = -50;
	blocks.push(block);
	game.addChild(block);
}
function spawnBullet() {
	var bullet = new Bullet();
	bullet.x = player.x;
	bullet.y = player.y - 50;
	bullets.push(bullet);
	game.addChild(bullet);
	LK.getSound('shoot').play();
}
// Beat tracking
game.update = function () {
	var currentTime = Date.now() - gameStartTime;
	var currentBeat = Math.floor(currentTime / beatInterval);
	// Flash beat indicator on beat
	if (currentBeat !== Math.floor((currentTime - 16) / beatInterval)) {
		flashBeatIndicator();
	}
	// Spawn blocks
	if (LK.ticks > nextBlockSpawn) {
		spawnBlock();
		nextBlockSpawn = LK.ticks + blockSpawnInterval;
		// Gradually increase difficulty
		if (blockSpawnInterval > 300) {
			blockSpawnInterval -= 5;
		}
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Remove bullets that go off screen
		if (bullet.lastY >= -50 && bullet.y < -50) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		bullet.lastY = bullet.y;
	}
	// Update blocks and check collisions
	for (var j = blocks.length - 1; j >= 0; j--) {
		var block = blocks[j];
		if (block.lastY === undefined) block.lastY = block.y;
		// Check if block reached bottom (game over condition)
		if (block.lastY < 2732 && block.y >= 2732) {
			LK.showGameOver();
			return;
		}
		// Check bullet-block collisions
		for (var k = bullets.length - 1; k >= 0; k--) {
			var bullet = bullets[k];
			if (bullet.intersects(block) && !block.hitByBullet) {
				block.hitByBullet = true;
				var onBeat = isOnBeat();
				// Visual feedback
				if (onBeat) {
					LK.effects.flashObject(block, 0x00ff00, 200);
					LK.getSound('beatHit').play();
				} else {
					LK.effects.flashObject(block, 0xffffff, 200);
					LK.getSound('hit').play();
				}
				updateScore(10, onBeat);
				// Remove bullet and block
				bullet.destroy();
				bullets.splice(k, 1);
				block.destroy();
				blocks.splice(j, 1);
				break;
			}
		}
		block.lastY = block.y;
	}
};
// Touch controls and dragging
var dragNode = null;
function handleMove(x, y, obj) {
	if (dragNode) {
		dragNode.x = x;
		// Keep player within screen bounds
		if (dragNode.x < 60) dragNode.x = 60;
		if (dragNode.x > 1988) dragNode.x = 1988;
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	// Set drag node to player for dragging
	dragNode = player;
	// Also call move handler right away to make effect instant
	handleMove(x, y, obj);
	// Spawn bullet on touch
	spawnBullet();
};
game.up = function (x, y, obj) {
	dragNode = null;
};

===================================================================
--- original.js
+++ change.js
@@ -221,8 +221,26 @@
 		}
 		block.lastY = block.y;
 	}
 };
-// Touch controls
+// Touch controls and dragging
+var dragNode = null;
+function handleMove(x, y, obj) {
+	if (dragNode) {
+		dragNode.x = x;
+		// Keep player within screen bounds
+		if (dragNode.x < 60) dragNode.x = 60;
+		if (dragNode.x > 1988) dragNode.x = 1988;
+	}
+}
+game.move = handleMove;
 game.down = function (x, y, obj) {
+	// Set drag node to player for dragging
+	dragNode = player;
+	// Also call move handler right away to make effect instant
+	handleMove(x, y, obj);
+	// Spawn bullet on touch
 	spawnBullet();
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
 };
\ No newline at end of file