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

/**** 
* Classes
****/ 
// Bomb collectible class
var BombCollectible = Container.expand(function () {
	var self = Container.call(this);
	var bombAsset = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Heart collectible class
var HeartCollectible = Container.expand(function () {
	var self = Container.call(this);
	var heartAsset = self.attachAsset('Heart', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obsAsset = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Speed will be set on creation
	self.speed = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Point collectible class
var PointCollectible = Container.expand(function () {
	var self = Container.call(this);
	var pointAsset = self.attachAsset('point', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Speed will be set on creation
	self.speed = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Runner class
var Runner = Container.expand(function () {
	var self = Container.call(this);
	var runnerAsset = self.attachAsset('runner', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For swipe movement
	self.targetX = self.x;
	self.targetY = self.y;
	// For collision flash
	self.flash = function () {
		tween(self, {
			alpha: 0.3
		}, {
			duration: 80,
			onFinish: function onFinish() {
				tween(self, {
					alpha: 1
				}, {
					duration: 120
				});
			}
		});
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x888888
});

/**** 
* Game Code
****/ 
// Game area dimensions
// Runner character: a colorful box
// Obstacle: a red ellipse
// Point collectible: a yellow box
// Play 'Troll' music in a loop as background music
LK.playMusic('Troll', {
	loop: true
});
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
// Runner start position
var runnerStartX = GAME_WIDTH / 2;
var runnerStartY = GAME_HEIGHT - 400;
// Create runner
var runner = new Runner();
runner.x = runnerStartX;
runner.y = runnerStartY;
runner.targetX = runner.x;
runner.targetY = runner.y;
game.addChild(runner);
// Score
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0x222222
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Lives and Money
var lives = 3;
var livesMoneyTxt = new Text2('♥ ' + lives + '   $' + money, {
	size: 100,
	fill: 0xff3b30
});
livesMoneyTxt.anchor.set(0, 0);
livesMoneyTxt.x = 120;
livesMoneyTxt.y = 40;
LK.gui.top.addChild(livesMoneyTxt);
// Arrays for obstacles and points
var obstacles = [];
var points = [];
var hearts = [];
var bombs = [];
var money = 0;
// Difficulty progression
var baseSpeed = 14;
var speedIncrease = 0.012; // per tick
var spawnInterval = 60; // ticks between spawns
var minSpawnInterval = 24;
var tickCount = 0;
// Swipe handling
var swipeStartX = null;
var swipeStartY = null;
var isSwiping = false;
// Helper: clamp value
function clamp(val, min, max) {
	return Math.max(min, Math.min(max, val));
}
// Touch/drag events for swipe
game.down = function (x, y, obj) {
	// Only start swipe if touch is not in top left 100x100
	if (x < 100 && y < 100) return;
	swipeStartX = x;
	swipeStartY = y;
	runnerStartX = runner.x; // Save runner's current X as the base for delta
	isSwiping = true;
};
game.move = function (x, y, obj) {
	// Only move runner if swipe is active
	if (isSwiping && swipeStartX !== null) {
		// Move runner by the same delta as finger movement
		var deltaX = x - swipeStartX;
		var newX = clamp(runnerStartX + deltaX, 100 + runner.width / 2, GAME_WIDTH - runner.width / 2 - 100);
		runner.x = newX;
		runner.y = runnerStartY;
	}
};
game.up = function (x, y, obj) {
	isSwiping = false;
	swipeStartX = null;
	swipeStartY = null;
	// Optionally, snap runner back to base Y
	tween(runner, {
		y: runnerStartY
	}, {
		duration: 180,
		easing: tween.cubicOut
	});
};
// Main game update loop
game.update = function () {
	tickCount++;
	// Increase speed over time
	var currentSpeed = baseSpeed + speedIncrease * tickCount;
	// Spawn obstacles, points, hearts, and bombs
	if (tickCount % spawnInterval === 0) {
		// Randomly decide: obstacle, point, heart, or bomb
		// 60% obstacle, 25% point, 8% heart, 7% bomb
		var rand = Math.random();
		var spawnType = 'obstacle';
		if (rand < 0.6) spawnType = 'obstacle';else if (rand < 0.85) spawnType = 'point';else if (rand < 0.93) spawnType = 'heart';else spawnType = 'bomb';
		var laneCount = 5;
		var laneWidth = (GAME_WIDTH - 400) / laneCount;
		var lane = Math.floor(Math.random() * laneCount);
		var spawnX = 200 + laneWidth / 2 + lane * laneWidth;
		var spawnY = -120;
		if (spawnType === 'obstacle') {
			var obs = new Obstacle();
			obs.x = spawnX;
			obs.y = spawnY;
			obs.speed = currentSpeed;
			obstacles.push(obs);
			game.addChild(obs);
		} else if (spawnType === 'point') {
			var pt = new PointCollectible();
			pt.x = spawnX;
			pt.y = spawnY;
			// Reduce coin (point) speed
			pt.speed = currentSpeed * 0.55;
			points.push(pt);
			game.addChild(pt);
		} else if (spawnType === 'heart') {
			var heart = new HeartCollectible();
			heart.x = spawnX;
			heart.y = spawnY;
			// Reduce heart speed
			heart.speed = currentSpeed * 0.55;
			hearts.push(heart);
			game.addChild(heart);
		} else if (spawnType === 'bomb') {
			var bomb = new BombCollectible();
			bomb.x = spawnX;
			bomb.y = spawnY;
			// Reduce bomb speed
			bomb.speed = currentSpeed * 0.55;
			bombs.push(bomb);
			game.addChild(bomb);
		}
		// Gradually decrease spawn interval to increase difficulty
		if (spawnInterval > minSpawnInterval && tickCount % 600 === 0) {
			spawnInterval -= 4;
			if (spawnInterval < minSpawnInterval) spawnInterval = minSpawnInterval;
		}
	}
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obs = obstacles[i];
		obs.update();
		// Remove if off screen
		if (obs.y - obs.height / 2 > GAME_HEIGHT + 100) {
			obs.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision with runner
		if (obs.intersects(runner)) {
			// Flash runner
			runner.flash();
			// Flash screen
			LK.effects.flashScreen(0xff3b30, 600);
			// Decrease lives
			lives -= 1;
			if (lives < 0) lives = 0;
			livesMoneyTxt.setText('♥ ' + lives + '   $' + money);
			// Remove obstacle so it doesn't hit again
			obs.destroy();
			obstacles.splice(i, 1);
			// Game over if no lives left
			if (lives <= 0) {
				LK.showGameOver();
				return;
			}
			continue;
		}
	}
	// Update points
	for (var j = points.length - 1; j >= 0; j--) {
		var pt = points[j];
		pt.update();
		// Remove if off screen
		if (pt.y - pt.height / 2 > GAME_HEIGHT + 100) {
			pt.destroy();
			points.splice(j, 1);
			continue;
		}
		// Collectible collision
		if (pt.intersects(runner)) {
			// Play coin collect sound
			LK.getSound('Meterial').play();
			// Add score and money
			score += 1;
			money += 1;
			LK.setScore(score);
			scoreTxt.setText(score);
			livesMoneyTxt.setText('♥ ' + lives + '   $' + money);
			// Flash screen yellow, similar to bomb's effect (darker, longer, more solid)
			LK.effects.flashScreen(0xffc800, 600);
			pt.destroy();
			points.splice(j, 1);
			continue;
		}
	}
	// Update hearts
	for (var h = hearts.length - 1; h >= 0; h--) {
		var heart = hearts[h];
		heart.update();
		// Remove if off screen
		if (heart.y - heart.height / 2 > GAME_HEIGHT + 100) {
			heart.destroy();
			hearts.splice(h, 1);
			continue;
		}
		// Collectible collision
		if (heart.intersects(runner)) {
			// Play "ohh" sound
			LK.getSound('ohh').play();
			// Add life
			lives += 1;
			livesMoneyTxt.setText('♥ ' + lives + '   $' + money);
			// No runner tint flash on heart collect; runner always stays default color
			heart.destroy();
			hearts.splice(h, 1);
			continue;
		}
	}
	// Update bombs
	for (var b = bombs.length - 1; b >= 0; b--) {
		var bomb = bombs[b];
		bomb.update();
		// Remove if off screen
		if (bomb.y - bomb.height / 2 > GAME_HEIGHT + 100) {
			bomb.destroy();
			bombs.splice(b, 1);
			continue;
		}
		// Bomb collision
		if (bomb.intersects(runner)) {
			// Play explosion and 'Ahh' sound together
			LK.getSound('Meterial').play();
			LK.getSound('Ahh').play();
			// Play troll music on bomb collision
			LK.playMusic('Troll', {
				loop: false
			});
			// Lose a life
			lives -= 1;
			if (lives < 0) lives = 0;
			livesMoneyTxt.setText('♥ ' + lives + '   $' + money);
			// No runner tint flash on bomb collect; runner always stays default color
			LK.effects.flashScreen(0x222222, 600);
			bomb.destroy();
			bombs.splice(b, 1);
			// Game over if no lives left
			if (lives <= 0) {
				LK.showGameOver();
				return;
			}
			continue;
		}
	}
};
// Center score text at top, avoid top left 100x100
scoreTxt.x = 1024;
scoreTxt.y = 40;

===================================================================
--- original.js
+++ change.js
@@ -97,12 +97,16 @@
 
 /**** 
 * Game Code
 ****/ 
-// Point collectible: a yellow box
-// Obstacle: a red ellipse
-// Runner character: a colorful box
 // Game area dimensions
+// Runner character: a colorful box
+// Obstacle: a red ellipse
+// Point collectible: a yellow box
+// Play 'Troll' music in a loop as background music
+LK.playMusic('Troll', {
+	loop: true
+});
 var GAME_WIDTH = 2048;
 var GAME_HEIGHT = 2732;
 // Runner start position
 var runnerStartX = GAME_WIDTH / 2;