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

/**** 
* Classes
****/ 
// Ball class
var GolfBall = Container.expand(function () {
	var self = Container.call(this);
	var ball = self.attachAsset('golfBall', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = ball.width / 2;
	self.vx = 0;
	self.vy = 0;
	self.moving = false;
	// For drag aiming
	self.aimArrow = null;
	// For tracking drag
	self.isAiming = false;
	self.aimStartX = 0;
	self.aimStartY = 0;
	self.aimEndX = 0;
	self.aimEndY = 0;
	// Show aim arrow
	self.showArrow = function (dx, dy) {
		if (!self.aimArrow) {
			self.aimArrow = LK.getAsset('golfArrow', {
				anchorX: 0.5,
				anchorY: 1
			});
			self.addChild(self.aimArrow);
		}
		var len = Math.sqrt(dx * dx + dy * dy);
		// Clamp arrow length for visual
		var maxLen = 300;
		var arrowLen = Math.min(len, maxLen);
		self.aimArrow.height = arrowLen;
		self.aimArrow.rotation = Math.atan2(dy, dx) + Math.PI / 2;
		self.aimArrow.visible = true;
	};
	self.hideArrow = function () {
		if (self.aimArrow) {
			self.aimArrow.visible = false;
		}
	};
	// Update ball physics
	self.update = function () {
		if (self.moving) {
			// Move ball
			self.x += self.vx;
			self.y += self.vy;
			// Friction
			var speed = Math.sqrt(self.vx * self.vx + self.vy * self.vy);
			if (speed > 0) {
				var friction = 0.98;
				self.vx *= friction;
				self.vy *= friction;
				// Stop if very slow
				if (Math.sqrt(self.vx * self.vx + self.vy * self.vy) < 1.2) {
					self.vx = 0;
					self.vy = 0;
					self.moving = false;
				}
			}
		}
	};
	return self;
});
// Hole class
var GolfHole = Container.expand(function () {
	var self = Container.call(this);
	var hole = self.attachAsset('golfHole', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = hole.width / 2;
	return self;
});
// Wall class
var GolfWall = Container.expand(function () {
	var self = Container.call(this);
	var wall = self.attachAsset('golfWall', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = wall.width;
	self.height = wall.height;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x6abf4b // green grass
});

/**** 
* Game Code
****/ 
// Arrow: yellow rectangle (for aiming indicator)
// Wall: green rectangle
// Hole: black circle
// Ball: white circle
// --- MENU SYSTEM ---
// Menu overlay container
var menuOverlay = new Container();
// Menu background (semi-transparent)
var menuBg = LK.getAsset('golfWall', {
	anchorX: 0.5,
	anchorY: 0.5,
	width: 1200,
	height: 1200
});
menuBg.alpha = 0.92;
menuBg.tint = 0x222222;
menuOverlay.addChild(menuBg);
menuBg.x = 2048 / 2;
menuBg.y = 2732 / 2;
// Menu title
var menuTitle = new Text2('SELECT MODE', {
	size: 140,
	fill: 0xFFFFFF
});
menuTitle.anchor.set(0.5, 0.5);
menuTitle.x = 2048 / 2;
menuTitle.y = 2732 / 2 - 400;
menuOverlay.addChild(menuTitle);
// Menu options
var menuOptions = [{
	label: "SANDBOX",
	desc: "NO TIME LIMIT",
	timer: null,
	increment: 0
}, {
	label: "BEGINNER",
	desc: "START: 30s, +5s/hole",
	timer: 30,
	increment: 5
}, {
	label: "PRO",
	desc: "START: 10s, +3s/hole",
	timer: 10,
	increment: 3
}, {
	label: "EXPERT",
	desc: "START: 3s, +2s/hole",
	timer: 3,
	increment: 2
}];
var menuButtons = [];
var menuDescLabels = [];
var menuButtonYStart = 2732 / 2 - 180;
var menuButtonSpacing = 220;
for (var i = 0; i < menuOptions.length; i++) {
	// Button
	var btn = new Text2(menuOptions[i].label, {
		size: 120,
		fill: 0xFFFF00
	});
	btn.anchor.set(0.5, 0.5);
	btn.x = 2048 / 2;
	btn.y = menuButtonYStart + i * menuButtonSpacing;
	btn.interactive = true;
	btn.buttonMode = true;
	menuOverlay.addChild(btn);
	menuButtons.push(btn);
	// Description
	var desc = new Text2(menuOptions[i].desc, {
		size: 60,
		fill: 0xFFFFFF
	});
	desc.anchor.set(0.5, 0.5);
	desc.x = 2048 / 2;
	desc.y = btn.y + 80;
	menuOverlay.addChild(desc);
	menuDescLabels.push(desc);
}
// Add menu overlay to game
game.addChild(menuOverlay);
// Hide game elements until menu is dismissed
var margin = 120;
var courseWidth = 2048 - margin * 2;
var courseHeight = 2732 - margin * 2;
var walls = [];
var topWall, bottomWall, leftWall, rightWall;
var hole, ball;
var strokes = 0;
var score = 0;
var scoreLabel, scoreTxt, timerDuration, timerValue, timerInterval, timerTxt;
var timeIncrement = 0;
var sandboxMode = false;
// Helper to show/hide game elements
function setGameElementsVisible(visible) {
	if (topWall) topWall.visible = visible;
	if (bottomWall) bottomWall.visible = visible;
	if (leftWall) leftWall.visible = visible;
	if (rightWall) rightWall.visible = visible;
	if (hole) hole.visible = visible;
	if (ball) ball.visible = visible;
	if (scoreLabel) scoreLabel.visible = visible;
	if (scoreTxt) scoreTxt.visible = visible;
	if (timerTxt) timerTxt.visible = visible;
}
// Remove menu and start game with selected mode
function startGameWithMode(modeIdx) {
	// Remove menu overlay
	if (menuOverlay.parent) menuOverlay.parent.removeChild(menuOverlay);
	// Set timer and increment
	var opt = menuOptions[modeIdx];
	sandboxMode = opt.timer === null;
	timerDuration = opt.timer === null ? 0 : opt.timer;
	timeIncrement = opt.increment;
	// Create walls
	topWall = new GolfWall();
	topWall.width = courseWidth;
	topWall.height = 300;
	topWall.x = 2048 / 2;
	topWall.y = margin - 200;
	topWall.children[0].width = courseWidth;
	topWall.children[0].height = 120;
	walls.push(topWall);
	game.addChild(topWall);
	bottomWall = new GolfWall();
	bottomWall.width = courseWidth;
	bottomWall.height = 300;
	bottomWall.x = 2048 / 2;
	bottomWall.y = 2732 - margin + 200;
	bottomWall.children[0].width = courseWidth;
	bottomWall.children[0].height = 120;
	walls.push(bottomWall);
	game.addChild(bottomWall);
	leftWall = new GolfWall();
	leftWall.width = 125;
	leftWall.height = courseHeight;
	leftWall.x = margin - 75;
	leftWall.y = 2732 / 2;
	leftWall.children[0].width = 120;
	leftWall.children[0].height = courseHeight;
	walls.push(leftWall);
	game.addChild(leftWall);
	rightWall = new GolfWall();
	rightWall.width = 125;
	rightWall.height = courseHeight;
	rightWall.x = 2048 - margin + 75;
	rightWall.y = 2732 / 2;
	rightWall.children[0].width = 120;
	rightWall.children[0].height = courseHeight;
	walls.push(rightWall);
	game.addChild(rightWall);
	// Create hole
	hole = new GolfHole();
	hole.x = 2048 - margin - 200;
	hole.y = 2732 - margin - 200;
	game.addChild(hole);
	// Create ball
	ball = new GolfBall();
	ball.x = margin + 200;
	ball.y = 2732 - margin - 400;
	game.addChild(ball);
	// Strokes and score
	strokes = 0;
	score = 0;
	// Score label (number of holes) at the center of the screen
	scoreLabel = new Text2('Score: ' + score, {
		size: 100,
		fill: 0xFFFFFF
	});
	scoreLabel.anchor.set(0.5, 0.5);
	game.addChild(scoreLabel);
	scoreLabel.x = 2048 / 2;
	scoreLabel.y = 2732 / 2 - 1100;
	// Score text (Strokes) at the top center
	scoreTxt = new Text2('Strokes: ' + strokes, {
		size: 100,
		fill: 0xFFFFFF
	});
	scoreTxt.anchor.set(0.5, 0);
	LK.gui.top.addChild(scoreTxt);
	scoreTxt.x = 2048 / 2;
	// Timer variables
	timerValue = timerDuration;
	timerInterval = null;
	// Timer text
	timerTxt = new Text2('Time: ' + (sandboxMode ? '∞' : timerValue), {
		size: 100,
		fill: 0xFFFFFF
	});
	timerTxt.anchor.set(0.5, 0.5);
	game.addChild(timerTxt);
	timerTxt.x = 2048 / 2;
	timerTxt.y = 2732 / 2;
	// Remove the pause button from the GUI overlay if it exists
	if (LK.gui.pause) {
		LK.gui.pause.visible = false;
		if (LK.gui.pause.parent) {
			LK.gui.pause.parent.removeChild(LK.gui.pause);
		}
	}
	// Start timer if not sandbox
	if (!sandboxMode) {
		startTimer();
	} else {
		timerTxt.setText('Time: ∞');
	}
	setGameElementsVisible(true);
}
// Attach menu button handlers
for (var i = 0; i < menuButtons.length; i++) {
	(function (idx) {
		menuButtons[idx].down = function (x, y, obj) {
			setGameElementsVisible(false);
			startGameWithMode(idx);
		};
	})(i);
}
// Hide game elements until menu is dismissed
setGameElementsVisible(false);
// --- END MENU SYSTEM ---
// Function to start/reset timer
function startTimer() {
	timerValue = timerDuration;
	timerTxt.setText('Time: ' + timerValue);
	if (timerInterval) {
		LK.clearInterval(timerInterval);
	}
	timerInterval = LK.setInterval(function () {
		timerValue -= 1;
		if (timerValue < 0) timerValue = 0;
		timerTxt.setText('Time: ' + timerValue);
		if (timerValue <= 0) {
			LK.clearInterval(timerInterval);
			LK.showGameOver();
		}
	}, 1000);
}
// Drag/aim state
var isDragging = false;
var dragStartX = 0;
var dragStartY = 0;
// Helper: clamp ball inside course
function clampBallPosition() {
	// No clamping to invisible walls; allow ball to go to the very edge of the course.
}
// Helper: ball-wall collision
function handleWallCollisions() {
	for (var i = 0; i < walls.length; i++) {
		var w = walls[i];
		// Axis-aligned rectangle collision
		var wx = w.x;
		var wy = w.y;
		var ww = w.width;
		var wh = w.height;
		var bx = ball.x;
		var by = ball.y;
		var r = ball.radius;
		// Rectangle bounds
		var left = wx - ww / 2;
		var right = wx + ww / 2;
		var top = wy - wh / 2;
		var bottom = wy + wh / 2;
		// Find closest point on wall to ball
		var closestX = Math.max(left, Math.min(bx, right));
		var closestY = Math.max(top, Math.min(by, bottom));
		var dx = bx - closestX;
		var dy = by - closestY;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < r) {
			// Ball is colliding with wall
			// Push ball out
			var overlap = r - dist + 1;
			if (dist === 0) {
				// Prevent NaN
				dx = 1;
				dy = 0;
				dist = 1;
			}
			// Move ball out of wall
			ball.x += dx / dist * overlap;
			ball.y += dy / dist * overlap;
			// Calculate the normal vector
			var nx = dx / dist;
			var ny = dy / dist;
			// Calculate dot product of velocity and normal
			var dot = ball.vx * nx + ball.vy * ny;
			// Reflect velocity using the normal (like center wall)
			ball.vx = ball.vx - 2 * dot * nx;
			ball.vy = ball.vy - 2 * dot * ny;
			// Dampen speed
			ball.vx *= 0.7;
			ball.vy *= 0.7;
		}
	}
}
// Helper: ball-in-hole detection
function checkHole() {
	var dx = ball.x - hole.x;
	var dy = ball.y - hole.y;
	var dist = Math.sqrt(dx * dx + dy * dy);
	if (dist < hole.radius - ball.radius / 2) {
		// Ball in hole! Instantly hide ball and the hole
		ball.moving = false;
		ball.vx = 0;
		ball.vy = 0;
		ball.visible = false;
		hole.visible = false;
		return true;
	}
	return false;
}
// Helper: reset ball after win (not needed, handled by LK.showYouWin)
// Game move handler (for drag aiming)
function handleMove(x, y, obj) {
	if (isDragging && !ball.moving) {
		// Clamp drag to max length
		var dx = x - dragStartX;
		var dy = y - dragStartY;
		var maxDrag = 400;
		var dragLen = Math.sqrt(dx * dx + dy * dy);
		if (dragLen > maxDrag) {
			var scale = maxDrag / dragLen;
			dx *= scale;
			dy *= scale;
		}
		// Show aim arrow
		ball.showArrow(-dx, -dy);
	}
}
// Game down handler (start drag)
game.down = function (x, y, obj) {
	// Only allow aiming if ball exists, is not moving, and touch is near ball
	if (typeof ball !== "undefined" && ball !== null && !ball.moving) {
		var dx = x - ball.x;
		var dy = y - ball.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < ball.radius + 40) {
			isDragging = true;
			dragStartX = ball.x;
			dragStartY = ball.y;
			ball.aimStartX = x;
			ball.aimStartY = y;
			ball.showArrow(0, 0);
		}
	}
};
// Game move handler
game.move = function (x, y, obj) {
	if (isDragging && !ball.moving) {
		// Update aim arrow
		var dx = x - dragStartX;
		var dy = y - dragStartY;
		var maxDrag = 400;
		var dragLen = Math.sqrt(dx * dx + dy * dy);
		if (dragLen > maxDrag) {
			var scale = maxDrag / dragLen;
			dx *= scale;
			dy *= scale;
		}
		ball.showArrow(-dx, -dy);
	}
};
// Game up handler (release drag, shoot)
game.up = function (x, y, obj) {
	if (isDragging && !ball.moving) {
		var dx = x - dragStartX;
		var dy = y - dragStartY;
		// Power proportional to drag length
		var power = Math.sqrt(dx * dx + dy * dy);
		var maxPower = 38;
		var minPower = 10;
		var shotPower = Math.min(power / 10, maxPower);
		if (shotPower < minPower / 2) {
			// Too short, ignore
			ball.hideArrow();
			isDragging = false;
			return;
		}
		// Set velocity (opposite direction of drag)
		var angle = Math.atan2(dy, dx);
		ball.vx = -Math.cos(angle) * shotPower;
		ball.vy = -Math.sin(angle) * shotPower;
		ball.moving = true;
		ball.hideArrow();
		isDragging = false;
		// Increment strokes
		strokes += 1;
		scoreTxt.setText('Strokes: ' + strokes);
	}
};
// Main game update
game.update = function () {
	// Ball physics
	if (typeof ball !== "undefined" && ball !== null && typeof ball.update === "function") {
		ball.update();
	}
	// Clamp ball inside course
	clampBallPosition();
	// Ball-wall collisions
	handleWallCollisions();
	// Ball-in-hole
	if (typeof hole !== "undefined" && hole !== null && hole.visible && ball && ball.visible) {
		var dx = ball.x - hole.x;
		var dy = ball.y - hole.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < hole.radius + ball.radius / 2) {
			// Ball touched the hole! Instantly hide the hole, but do not dequeue or hide the ball
			if (hole.parent) {
				hole.parent.removeChild(hole);
			}
			hole.visible = false;
			// Increment score and update label
			score += 1;
			scoreLabel.setText('Score: ' + score);
			// Add time increment if not sandbox
			if (!sandboxMode) {
				timerValue = Math.min(timerValue + timeIncrement, 99);
				timerTxt.setText('Time: ' + timerValue);
			} else {
				timerTxt.setText('Time: ∞');
			}
			// Do not stop the ball when it touches the hole; let it keep moving
			// Create a new hole at a random position (not too close to the ball or walls)
			var newHole = new GolfHole();
			var safeMargin = margin + 200;
			var minDistFromBall = 400;
			var placed = false;
			for (var tries = 0; tries < 20 && !placed; tries++) {
				var hx = Math.random() * (2048 - 2 * safeMargin) + safeMargin;
				var hy = Math.random() * (2732 - 2 * safeMargin) + safeMargin;
				var bdx = hx - ball.x;
				var bdy = hy - ball.y;
				var bdist = Math.sqrt(bdx * bdx + bdy * bdy);
				if (bdist > minDistFromBall) {
					newHole.x = hx;
					newHole.y = hy;
					placed = true;
				}
			}
			if (!placed) {
				// fallback: just put it somewhere safe
				newHole.x = 2048 / 2;
				newHole.y = 2732 / 2;
			}
			game.addChild(newHole);
			hole = newHole;
			// No timer reset here, just add time increment above
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -431,10 +431,10 @@
 	}
 }
 // Game down handler (start drag)
 game.down = function (x, y, obj) {
-	// Only allow aiming if ball is not moving and touch is near ball
-	if (!ball.moving) {
+	// Only allow aiming if ball exists, is not moving, and touch is near ball
+	if (typeof ball !== "undefined" && ball !== null && !ball.moving) {
 		var dx = x - ball.x;
 		var dy = y - ball.y;
 		var dist = Math.sqrt(dx * dx + dy * dy);
 		if (dist < ball.radius + 40) {