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

/**** 
* Classes
****/ 
// Ball (player) class
var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ballGfx = self.attachAsset('ball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = ballGfx.width / 2;
	self.vx = 0;
	self.vy = 0;
	self.launched = false;
	self.resting = true; // true if waiting for launch
	self.bounceCooldown = 0; // prevent double bounces
	self.update = function () {
		if (self.launched) {
			// Gravity
			self.vy += 1.2;
			// Move
			self.x += self.vx;
			self.y += self.vy;
			// Friction (air)
			self.vx *= 0.995;
			// Clamp to game area
			if (self.x < self.radius) self.x = self.radius;
			if (self.x > 2048 - self.radius) self.x = 2048 - self.radius;
			// If falls below screen, game over
			if (self.y > 2732 + 200) {
				LK.effects.flashScreen(0xff0000, 800);
				LK.showGameOver();
			}
		}
	};
	// Reset ball to start
	self.reset = function () {
		self.x = 2048 / 2;
		self.y = typeof ballStartY !== "undefined" ? ballStartY : 2732 - 180;
		self.vx = 0;
		self.vy = 0;
		self.launched = false;
		self.resting = true;
		self.bounceCooldown = 0;
	};
	// Bounce up (from bouncy car)
	self.bounce = function (strength) {
		self.vy = -Math.abs(strength || 38 + Math.random() * 8);
		self.launched = true;
		self.resting = false;
		self.bounceCooldown = 10;
	};
	return self;
});
// BouncyCar (bouncy vehicle) class
var BouncyCar = Container.expand(function () {
	var self = Container.call(this);
	var bouncyGfx = self.attachAsset('bouncycar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = bouncyGfx.width;
	self.height = bouncyGfx.height;
	self.speed = 0;
	self.lane = 0;
	self.type = 'bouncycar';
	self.bouncePhase = Math.random() * Math.PI * 2;
	self.update = function () {
		self.x += self.speed;
		// Bouncy up-down
		self.y0 = self.y0 || self.y;
		self.y = self.y0 + Math.sin(LK.ticks / 12 + self.bouncePhase) * 38;
		if (self.speed > 0 && self.x > 2048 + 200) self.destroyed = true;
		if (self.speed < 0 && self.x < -200) self.destroyed = true;
	};
	return self;
});
// Car (normal) class
var Car = Container.expand(function () {
	var self = Container.call(this);
	var carGfx = self.attachAsset('car', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = carGfx.width;
	self.height = carGfx.height;
	self.speed = 0;
	self.lane = 0;
	self.type = 'car';
	self.update = function () {
		self.x += self.speed;
		// Remove if out of screen
		if (self.speed > 0 && self.x > 2048 + 200) self.destroyed = true;
		if (self.speed < 0 && self.x < -200) self.destroyed = true;
	};
	return self;
});
// Truck (long vehicle) class
var Truck = Container.expand(function () {
	var self = Container.call(this);
	var truckGfx = self.attachAsset('truck', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = truckGfx.width;
	self.height = truckGfx.height;
	self.speed = 0;
	self.lane = 0;
	self.type = 'truck';
	self.update = function () {
		self.x += self.speed;
		if (self.speed > 0 && self.x > 2048 + 300) self.destroyed = true;
		if (self.speed < 0 && self.x < -300) self.destroyed = true;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222222
});

/**** 
* Game Code
****/ 
// Slingshot band
// Bouncy car
// Truck
// Car
// Lane divider
// Road background
// Stop (target)
// Ball (player)
// --- Game variables ---
var lanes = [0, 1, 2, 3, 4, 5];
var laneYs = [];
var laneCount = 6;
var roadTop = 600;
var roadHeight = 1536;
var laneGap = roadHeight / laneCount;
for (var i = 0; i < laneCount; ++i) {
	laneYs[i] = roadTop + laneGap / 2 + i * laneGap;
}
// Place stop (target) at the top of the road, centered horizontally
var stopY = roadTop + 90;
var stopX = 2048 / 2;
var stopRadius = 90;
var level = 1;
var vehicles = [];
var ball = null;
var stop = null;
var slingshotBand = null;
var isDragging = false;
// Place the ball higher up (not at the very bottom)
var ballStartY = roadTop + roadHeight + 120;
var dragStart = {
	x: 0,
	y: 0
};
var dragCurrent = {
	x: 0,
	y: 0
};
var launchPower = 0;
var launchAngle = 0;
var canLaunch = true;
var scoreTxt = null;
var levelTxt = null;
var winTimeout = null;
// --- Draw road and lanes ---
var road = LK.getAsset('road', {
	x: 0,
	y: roadTop,
	width: 2048,
	height: roadHeight
});
game.addChild(road);
// Lane dividers
for (var i = 1; i < laneCount; ++i) {
	var divider = LK.getAsset('divider', {
		x: 0,
		y: roadTop + i * laneGap - 12,
		width: 2048,
		height: 24
	});
	game.addChild(divider);
}
// --- Stop (target) ---
stop = LK.getAsset('stop', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: stopX,
	y: stopY
});
game.addChild(stop);
// --- Ball (player) ---
ball = new Ball();
game.addChild(ball);
ball.reset();
// --- Slingshot band (visual) ---
slingshotBand = LK.getAsset('band', {
	anchorX: 0.5,
	anchorY: 1,
	x: ball.x,
	y: ball.y
});
slingshotBand.visible = false;
game.addChild(slingshotBand);
// --- GUI: Score and Level ---
scoreTxt = new Text2('0', {
	size: 110,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
levelTxt = new Text2('1', {
	size: 70,
	fill: "#fff"
});
levelTxt.anchor.set(0.5, 0);
LK.gui.topRight.addChild(levelTxt);
// --- Game state ---
function resetGameState() {
	// Remove vehicles
	for (var i = 0; i < vehicles.length; ++i) {
		vehicles[i].destroy();
	}
	vehicles = [];
	// Reset ball
	ball.reset();
	// Reset slingshot
	slingshotBand.visible = false;
	isDragging = false;
	canLaunch = true;
	// Reset score/level
	LK.setScore(0);
	scoreTxt.setText('0');
	level = 1;
	levelTxt.setText('1');
}
resetGameState();
// --- Vehicle spawner ---
function spawnVehicle() {
	// Randomly pick lane
	var lane = Math.floor(Math.random() * laneCount);
	var y = laneYs[lane];
	// Randomly pick type
	var t = Math.random();
	var v, dir, speed;
	if (t < 0.6) {
		v = new Car();
		speed = 12 + level * 1.2 + Math.random() * 2;
	} else if (t < 0.85) {
		v = new Truck();
		speed = 8 + level * 1.1 + Math.random() * 2;
	} else {
		v = new BouncyCar();
		speed = 10 + level * 1.3 + Math.random() * 2;
	}
	// Direction: even lanes left->right, odd right->left
	dir = lane % 2 === 0 ? 1 : -1;
	v.lane = lane;
	v.y = y;
	v.y0 = y;
	v.speed = speed * dir;
	if (dir > 0) v.x = -200;else v.x = 2048 + 200;
	vehicles.push(v);
	game.addChild(v);
}
// --- Level progression ---
function nextLevel() {
	level += 1;
	levelTxt.setText(level + '');
	// Remove all vehicles
	for (var i = 0; i < vehicles.length; ++i) vehicles[i].destroy();
	vehicles = [];
	// Reset ball
	ball.reset();
	canLaunch = true;
	slingshotBand.visible = false;
}
// --- Game update ---
game.update = function () {
	// Ball update
	ball.update();
	// Vehicles update
	for (var i = vehicles.length - 1; i >= 0; --i) {
		var v = vehicles[i];
		v.update();
		// Remove destroyed
		if (v.destroyed) {
			v.destroy();
			vehicles.splice(i, 1);
			continue;
		}
	}
	// Ball-vehicle collision
	if (ball.launched && ball.bounceCooldown <= 0) {
		for (var i = 0; i < vehicles.length; ++i) {
			var v = vehicles[i];
			// AABB collision
			var dx = Math.abs(ball.x - v.x);
			var dy = Math.abs(ball.y - v.y);
			var overlapX = dx < ball.radius + v.width / 2 - 10;
			var overlapY = dy < ball.radius + v.height / 2 - 10;
			if (overlapX && overlapY) {
				if (v.type === 'bouncycar') {
					// Bounce up
					ball.bounce();
					ball.bounceCooldown = 12;
					LK.effects.flashObject(v, 0xffff00, 400);
				} else {
					// Crash: game over
					LK.effects.flashScreen(0xff0000, 800);
					LK.showGameOver();
					return;
				}
			}
		}
	}
	if (ball.bounceCooldown > 0) ball.bounceCooldown--;
	// Ball-stop (target) collision
	if (ball.launched && !ball.resting) {
		var dx = ball.x - stop.x;
		var dy = ball.y - stop.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < stopRadius + ball.radius - 10 && Math.abs(ball.vy) < 18) {
			// Win!
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore() + '');
			LK.effects.flashObject(stop, 0x00ff00, 600);
			canLaunch = false;
			ball.launched = false;
			ball.resting = true;
			// Next level after short delay
			if (winTimeout) LK.clearTimeout(winTimeout);
			winTimeout = LK.setTimeout(function () {
				nextLevel();
			}, 1200);
		}
	}
	// Vehicle spawn logic
	if (LK.ticks % Math.max(38 - Math.min(level * 2, 30), 10) === 0) {
		spawnVehicle();
	}
};
// --- Slingshot controls ---
function getDragVector() {
	var dx = dragCurrent.x - dragStart.x;
	var dy = dragCurrent.y - dragStart.y;
	return {
		dx: dx,
		dy: dy
	};
}
function updateSlingshotBand() {
	if (!isDragging) {
		slingshotBand.visible = false;
		return;
	}
	var vec = getDragVector();
	var len = Math.sqrt(vec.dx * vec.dx + vec.dy * vec.dy);
	var maxLen = 420;
	if (len > maxLen) {
		vec.dx *= maxLen / len;
		vec.dy *= maxLen / len;
		len = maxLen;
	}
	// Band position: from ball center to drag point
	slingshotBand.visible = true;
	slingshotBand.x = ball.x;
	slingshotBand.y = ball.y;
	slingshotBand.height = len;
	slingshotBand.rotation = Math.atan2(vec.dy, vec.dx) + Math.PI / 2;
}
// --- Input handlers ---
game.down = function (x, y, obj) {
	// Only allow drag if ball is at rest and not in win state
	if (!canLaunch || !ball.resting) return;
	// Only allow drag if touch is near ball
	var dx = x - ball.x;
	var dy = y - ball.y;
	if (dx * dx + dy * dy < ball.radius * ball.radius * 2.2) {
		isDragging = true;
		dragStart.x = ball.x;
		dragStart.y = ball.y;
		dragCurrent.x = x;
		dragCurrent.y = y;
		updateSlingshotBand();
	}
};
game.move = function (x, y, obj) {
	if (!isDragging) return;
	dragCurrent.x = x;
	dragCurrent.y = y;
	updateSlingshotBand();
};
game.up = function (x, y, obj) {
	if (!isDragging) return;
	isDragging = false;
	slingshotBand.visible = false;
	// Launch!
	var vec = getDragVector();
	var len = Math.sqrt(vec.dx * vec.dx + vec.dy * vec.dy);
	if (len < 60) return; // too short
	var maxLen = 420;
	if (len > maxLen) {
		vec.dx *= maxLen / len;
		vec.dy *= maxLen / len;
		len = maxLen;
	}
	// Only allow upward launches
	if (vec.dy > -30) return;
	// Set velocity (scaled)
	ball.vx = -vec.dx * 0.055;
	ball.vy = -vec.dy * 0.055;
	ball.launched = true;
	ball.resting = false;
	canLaunch = false;
};
// --- Game over/win handling ---
LK.on('gameover', function () {
	resetGameState();
});
LK.on('youwin', function () {
	resetGameState();
});

===================================================================
--- original.js
+++ change.js
@@ -40,9 +40,9 @@
 	};
 	// Reset ball to start
 	self.reset = function () {
 		self.x = 2048 / 2;
-		self.y = 2732 - 180;
+		self.y = typeof ballStartY !== "undefined" ? ballStartY : 2732 - 180;
 		self.vx = 0;
 		self.vy = 0;
 		self.launched = false;
 		self.resting = true;
@@ -138,26 +138,29 @@
 // Road background
 // Stop (target)
 // Ball (player)
 // --- Game variables ---
-var lanes = [0, 1, 2, 3];
+var lanes = [0, 1, 2, 3, 4, 5];
 var laneYs = [];
-var laneCount = 4;
-var roadTop = 800;
-var roadHeight = 1200;
+var laneCount = 6;
+var roadTop = 600;
+var roadHeight = 1536;
 var laneGap = roadHeight / laneCount;
 for (var i = 0; i < laneCount; ++i) {
 	laneYs[i] = roadTop + laneGap / 2 + i * laneGap;
 }
-var stopY = roadTop + roadHeight / 2;
+// Place stop (target) at the top of the road, centered horizontally
+var stopY = roadTop + 90;
 var stopX = 2048 / 2;
 var stopRadius = 90;
 var level = 1;
 var vehicles = [];
 var ball = null;
 var stop = null;
 var slingshotBand = null;
 var isDragging = false;
+// Place the ball higher up (not at the very bottom)
+var ballStartY = roadTop + roadHeight + 120;
 var dragStart = {
 	x: 0,
 	y: 0
 };