/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	level: 1,
	stars: 0
});

/**** 
* Classes
****/ 
// Exit (level goal) class
var Exit = Container.expand(function () {
	var self = Container.call(this);
	var exit = self.attachAsset('exit', {
		anchorX: 0.5,
		anchorY: 1
	});
	return self;
});
// Parallax background layer class
var ParallaxLayer = Container.expand(function () {
	var self = Container.call(this);
	self.speed = 0;
	self.sprite = null;
	self.setLayer = function (id, speed) {
		self.sprite = self.attachAsset(id, {
			anchorX: 0,
			anchorY: 0
		});
		self.speed = speed;
	};
	self.update = function (dx) {
		if (self.sprite) {
			self.x -= dx * self.speed;
			if (self.x < -2048) self.x += 2048;
			if (self.x > 2048) self.x -= 2048;
		}
	};
	return self;
});
// Platform class
var Platform = Container.expand(function () {
	var self = Container.call(this);
	var plat = self.attachAsset('platform', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});
// Runner (player) class
var Runner = Container.expand(function () {
	var self = Container.call(this);
	var runnerSprite = self.attachAsset('runner', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Physics
	self.vx = 0;
	self.vy = 0;
	self.onGround = false;
	self.doubleJumped = false;
	self.wallJumped = false;
	self.facing = 1; // 1: right, -1: left
	self.isSliding = false;
	self.slideTimer = 0;
	self.jumpBuffer = 0;
	self.dead = false;
	// Movement constants
	self.speed = 16;
	self.jumpPower = 48;
	self.gravity = 4;
	self.maxFall = 48;
	self.slideDuration = 18;
	self.slideSpeed = 24;
	self.wallJumpPower = 44;
	self.wallJumpH = 18;
	// For wall jump detection
	self.touchingWall = 0; // -1: left, 1: right, 0: none
	// Update per frame
	self.update = function () {
		if (self.dead) return;
		// Horizontal movement (auto-run)
		self.vx = self.isSliding ? self.slideSpeed * self.facing : self.speed * self.facing;
		// Gravity
		self.vy += self.gravity;
		if (self.vy > self.maxFall) self.vy = self.maxFall;
		// Slide timer
		if (self.isSliding) {
			self.slideTimer--;
			if (self.slideTimer <= 0) {
				self.isSliding = false;
				runnerSprite.height = 180;
				runnerSprite.y = 0;
			}
		}
		// Apply movement
		self.x += self.vx;
		self.y += self.vy;
		// Clamp to world bounds
		if (self.x < 60) self.x = 60;
		if (self.x > 2048 - 60) self.x = 2048 - 60;
		if (self.y > 2732 - 60) {
			self.y = 2732 - 60;
			self.vy = 0;
			self.onGround = true;
			self.doubleJumped = false;
			self.wallJumped = false;
		}
	};
	// Jump
	self.jump = function () {
		if (self.dead) return;
		if (self.onGround) {
			self.vy = -self.jumpPower;
			self.onGround = false;
			self.doubleJumped = false;
			LK.getSound('jump').play();
		} else if (!self.doubleJumped) {
			self.vy = -self.jumpPower * 0.9;
			self.doubleJumped = true;
			LK.getSound('jump').play();
		} else if (self.touchingWall !== 0 && !self.wallJumped) {
			self.vy = -self.wallJumpPower;
			self.vx = self.wallJumpH * -self.touchingWall;
			self.wallJumped = true;
			self.facing = -self.touchingWall;
			LK.getSound('jump').play();
		}
	};
	// Slide
	self.slide = function () {
		if (self.dead) return;
		if (self.onGround && !self.isSliding) {
			self.isSliding = true;
			self.slideTimer = self.slideDuration;
			runnerSprite.height = 90;
			runnerSprite.y = 90;
		}
	};
	// Die
	self.die = function () {
		if (self.dead) return;
		self.dead = true;
		LK.getSound('death').play();
		tween(self, {
			alpha: 0
		}, {
			duration: 400,
			easing: tween.linear,
			onFinish: function onFinish() {
				LK.effects.flashScreen(0xff0000, 600);
				LK.showGameOver();
			}
		});
	};
	return self;
});
// Spike (obstacle) class
var Spike = Container.expand(function () {
	var self = Container.call(this);
	var spike = self.attachAsset('spike', {
		anchorX: 0.5,
		anchorY: 1
	});
	return self;
});
// Star collectible class
var Star = Container.expand(function () {
	var self = Container.call(this);
	var star = self.attachAsset('star', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.collected = false;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222a38
});

/**** 
* Game Code
****/ 
// Music
// Sound effects
// Parallax background layers
// Level exit
// Star collectible
// Obstacle (spike)
// Ground platform
// Silhouette runner (player)
// --- Level Data (MVP: 1 level, can expand later) ---
var levelData = {
	platforms: [{
		x: 1024,
		y: 2600,
		w: 1200
	},
	// ground
	{
		x: 600,
		y: 2200,
		w: 400
	}, {
		x: 1400,
		y: 2000,
		w: 400
	}, {
		x: 900,
		y: 1700,
		w: 300
	}, {
		x: 400,
		y: 1400,
		w: 300
	}, {
		x: 1200,
		y: 1200,
		w: 400
	}, {
		x: 1800,
		y: 900,
		w: 300
	}],
	spikes: [{
		x: 800,
		y: 2540
	}, {
		x: 1300,
		y: 2540
	}, {
		x: 1400,
		y: 1940
	}, {
		x: 1200,
		y: 1140
	}],
	stars: [{
		x: 600,
		y: 2100
	}, {
		x: 900,
		y: 1600
	}, {
		x: 1800,
		y: 800
	}],
	exit: {
		x: 1800,
		y: 740
	}
};
// --- Parallax Background ---
var bg_far = new ParallaxLayer();
bg_far.setLayer('bg_far', 0.1);
game.addChild(bg_far);
var bg_mid = new ParallaxLayer();
bg_mid.setLayer('bg_mid', 0.2);
game.addChild(bg_mid);
var bg_near = new ParallaxLayer();
bg_near.setLayer('bg_near', 0.3);
game.addChild(bg_near);
// --- Platforms ---
var platforms = [];
for (var i = 0; i < levelData.platforms.length; i++) {
	var p = new Platform();
	p.x = levelData.platforms[i].x;
	p.y = levelData.platforms[i].y;
	p.width = levelData.platforms[i].w;
	p.children[0].width = levelData.platforms[i].w;
	platforms.push(p);
	game.addChild(p);
}
// --- Spikes ---
var spikes = [];
for (var i = 0; i < levelData.spikes.length; i++) {
	var s = new Spike();
	s.x = levelData.spikes[i].x;
	s.y = levelData.spikes[i].y;
	spikes.push(s);
	game.addChild(s);
}
// --- Stars ---
var stars = [];
for (var i = 0; i < levelData.stars.length; i++) {
	var st = new Star();
	st.x = levelData.stars[i].x;
	st.y = levelData.stars[i].y;
	stars.push(st);
	game.addChild(st);
}
// --- Exit ---
var exit = new Exit();
exit.x = levelData.exit.x;
exit.y = levelData.exit.y;
game.addChild(exit);
// --- Runner (Player) ---
var runner = new Runner();
runner.x = 200;
runner.y = 2500;
game.addChild(runner);
// --- Camera ---
var cameraY = 0;
// --- Score/Stars UI ---
var starTxt = new Text2('0', {
	size: 100,
	fill: 0xFFE066
});
starTxt.anchor.set(0, 0);
LK.gui.top.addChild(starTxt);
starTxt.x = 120;
starTxt.y = 10;
// --- Level UI ---
var levelTxt = new Text2('Level 1', {
	size: 80,
	fill: 0xFFFFFF
});
levelTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(levelTxt);
levelTxt.x = 1024;
levelTxt.y = 10;
// --- Touch Controls (Jump/Slide/Left/Right) ---
// Left Arrow Button
var leftBtn = new Text2('←', {
	size: 120,
	fill: 0xFFFFFF
});
leftBtn.anchor.set(0.5, 1);
LK.gui.bottomLeft.addChild(leftBtn);
leftBtn.x = 80;
leftBtn.y = -40;
// Right Arrow Button
var rightBtn = new Text2('→', {
	size: 120,
	fill: 0xFFFFFF
});
rightBtn.anchor.set(0.5, 1);
LK.gui.bottomLeft.addChild(rightBtn);
rightBtn.x = 320;
rightBtn.y = -40;
// Jump Button
var jumpBtn = new Text2('JUMP', {
	size: 80,
	fill: 0xFFFFFF
});
jumpBtn.anchor.set(0.5, 1);
LK.gui.bottomLeft.addChild(jumpBtn);
jumpBtn.x = 560;
jumpBtn.y = -40;
// Slide Button
var slideBtn = new Text2('SLIDE', {
	size: 80,
	fill: 0xFFFFFF
});
slideBtn.anchor.set(0.5, 1);
LK.gui.bottomRight.addChild(slideBtn);
slideBtn.x = -200;
slideBtn.y = -40;
// --- Touch Controls State for Arrows ---
var leftPressed = false;
var rightPressed = false;
// --- Arrow Button Events ---
leftBtn.down = function () {
	leftPressed = true;
	rightPressed = false;
	runner.facing = -1;
};
leftBtn.up = function () {
	leftPressed = false;
};
rightBtn.down = function () {
	rightPressed = true;
	leftPressed = false;
	runner.facing = 1;
};
rightBtn.up = function () {
	rightPressed = false;
};
// --- State ---
var collectedStars = 0;
var levelComplete = false;
// --- Helper: AABB collision ---
function aabb(a, b) {
	return a.x - a.width / 2 < b.x + b.width / 2 && a.x + a.width / 2 > b.x - b.width / 2 && a.y - a.height < b.y && a.y > b.y - b.height;
}
// --- Game Update ---
game.update = function () {
	// Camera follows runner
	var targetY = runner.y - 1800;
	cameraY += (targetY - cameraY) * 0.15;
	game.y = -cameraY;
	// Parallax backgrounds
	bg_far.update(runner.vx * 0.5);
	bg_mid.update(runner.vx * 0.7);
	bg_near.update(runner.vx);
	// Runner physics
	runner.onGround = false;
	runner.touchingWall = 0;
	// --- Arrow Button Direction Control ---
	if (leftPressed && !rightPressed) {
		runner.facing = -1;
	} else if (rightPressed && !leftPressed) {
		runner.facing = 1;
	}
	// Platform collision
	for (var i = 0; i < platforms.length; i++) {
		var p = platforms[i];
		// Only check if close
		if (Math.abs(runner.x - p.x) < p.width / 2 + 80 && Math.abs(runner.y - p.y) < 200) {
			// Vertical collision (landing)
			if (runner.y + runner.vy >= p.y - 30 && runner.y < p.y && runner.x > p.x - p.width / 2 + 30 && runner.x < p.x + p.width / 2 - 30 && runner.vy >= 0) {
				runner.y = p.y - 30;
				runner.vy = 0;
				runner.onGround = true;
				runner.doubleJumped = false;
				runner.wallJumped = false;
			}
			// Wall collision (left)
			if (runner.x + runner.vx > p.x - p.width / 2 - 60 && runner.x < p.x - p.width / 2 && runner.y > p.y - 120 && runner.y < p.y + 30) {
				runner.x = p.x - p.width / 2 - 60;
				runner.vx = 0;
				runner.touchingWall = -1;
			}
			// Wall collision (right)
			if (runner.x + runner.vx < p.x + p.width / 2 + 60 && runner.x > p.x + p.width / 2 && runner.y > p.y - 120 && runner.y < p.y + 30) {
				runner.x = p.x + p.width / 2 + 60;
				runner.vx = 0;
				runner.touchingWall = 1;
			}
		}
	}
	// Spikes collision
	for (var i = 0; i < spikes.length; i++) {
		var s = spikes[i];
		if (!runner.dead && Math.abs(runner.x - s.x) < 60 && Math.abs(runner.y - s.y) < 60) {
			runner.die();
		}
	}
	// Star collection
	for (var i = 0; i < stars.length; i++) {
		var st = stars[i];
		if (!st.collected && Math.abs(runner.x - st.x) < 60 && Math.abs(runner.y - st.y) < 80) {
			st.collected = true;
			tween(st, {
				alpha: 0,
				y: st.y - 80
			}, {
				duration: 400,
				onFinish: function onFinish() {
					st.destroy();
				}
			});
			collectedStars++;
			LK.getSound('star').play();
			starTxt.setText(collectedStars);
		}
	}
	// Exit collision
	if (!levelComplete && Math.abs(runner.x - exit.x) < 80 && Math.abs(runner.y - exit.y) < 160) {
		levelComplete = true;
		LK.getSound('exit').play();
		tween(runner, {
			alpha: 0
		}, {
			duration: 400,
			onFinish: function onFinish() {
				// Save progress
				storage.level = Math.max(storage.level, 2);
				storage.stars = (storage.stars || 0) + collectedStars;
				LK.setScore(collectedStars);
				LK.showYouWin();
			}
		});
	}
};
// --- Touch Controls ---
jumpBtn.down = function () {
	runner.jump();
};
slideBtn.down = function () {
	runner.slide();
};
// --- Swipe Controls (for mobile) ---
var swipeStartY = null;
game.down = function (x, y, obj) {
	swipeStartY = y;
};
game.up = function (x, y, obj) {
	if (swipeStartY !== null) {
		var dy = y - swipeStartY;
		if (dy < -80) {
			runner.jump();
		} else if (dy > 80) {
			runner.slide();
		}
	}
	swipeStartY = null;
};
// --- Music ---
LK.playMusic('bgm1');
// --- Init UI ---
starTxt.setText(collectedStars);
levelTxt.setText('Level 1');

===================================================================
--- original.js
+++ change.js
@@ -324,25 +324,65 @@
 levelTxt.anchor.set(0.5, 0);
 LK.gui.top.addChild(levelTxt);
 levelTxt.x = 1024;
 levelTxt.y = 10;
-// --- Touch Controls (Jump/Slide) ---
+// --- Touch Controls (Jump/Slide/Left/Right) ---
+// Left Arrow Button
+var leftBtn = new Text2('←', {
+	size: 120,
+	fill: 0xFFFFFF
+});
+leftBtn.anchor.set(0.5, 1);
+LK.gui.bottomLeft.addChild(leftBtn);
+leftBtn.x = 80;
+leftBtn.y = -40;
+// Right Arrow Button
+var rightBtn = new Text2('→', {
+	size: 120,
+	fill: 0xFFFFFF
+});
+rightBtn.anchor.set(0.5, 1);
+LK.gui.bottomLeft.addChild(rightBtn);
+rightBtn.x = 320;
+rightBtn.y = -40;
+// Jump Button
 var jumpBtn = new Text2('JUMP', {
 	size: 80,
 	fill: 0xFFFFFF
 });
 jumpBtn.anchor.set(0.5, 1);
 LK.gui.bottomLeft.addChild(jumpBtn);
-jumpBtn.x = 200;
+jumpBtn.x = 560;
 jumpBtn.y = -40;
+// Slide Button
 var slideBtn = new Text2('SLIDE', {
 	size: 80,
 	fill: 0xFFFFFF
 });
 slideBtn.anchor.set(0.5, 1);
 LK.gui.bottomRight.addChild(slideBtn);
 slideBtn.x = -200;
 slideBtn.y = -40;
+// --- Touch Controls State for Arrows ---
+var leftPressed = false;
+var rightPressed = false;
+// --- Arrow Button Events ---
+leftBtn.down = function () {
+	leftPressed = true;
+	rightPressed = false;
+	runner.facing = -1;
+};
+leftBtn.up = function () {
+	leftPressed = false;
+};
+rightBtn.down = function () {
+	rightPressed = true;
+	leftPressed = false;
+	runner.facing = 1;
+};
+rightBtn.up = function () {
+	rightPressed = false;
+};
 // --- State ---
 var collectedStars = 0;
 var levelComplete = false;
 // --- Helper: AABB collision ---
@@ -361,8 +401,14 @@
 	bg_near.update(runner.vx);
 	// Runner physics
 	runner.onGround = false;
 	runner.touchingWall = 0;
+	// --- Arrow Button Direction Control ---
+	if (leftPressed && !rightPressed) {
+		runner.facing = -1;
+	} else if (rightPressed && !leftPressed) {
+		runner.facing = 1;
+	}
 	// Platform collision
 	for (var i = 0; i < platforms.length; i++) {
 		var p = platforms[i];
 		// Only check if close