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

/**** 
* Classes
****/ 
var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ballGraphics = self.attachAsset('ball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.gravity = 0.5;
	self.friction = 0.98;
	self.bounceForce = 0.8;
	self.maxSpeed = 15;
	self.update = function () {
		// Apply gravity
		self.velocityY += self.gravity;
		// Apply friction
		self.velocityX *= self.friction;
		self.velocityY *= self.friction;
		// Limit max speed
		var speed = Math.sqrt(self.velocityX * self.velocityX + self.velocityY * self.velocityY);
		if (speed > self.maxSpeed) {
			self.velocityX = self.velocityX / speed * self.maxSpeed;
			self.velocityY = self.velocityY / speed * self.maxSpeed;
		}
		// Update position
		self.x += self.velocityX;
		self.y += self.velocityY;
		// Check maze boundaries and collisions
		checkBallCollisions();
	};
	self.addForce = function (forceX, forceY) {
		self.velocityX += forceX;
		self.velocityY += forceY;
	};
	return self;
});
var MazeCell = Container.expand(function (cellType) {
	var self = Container.call(this);
	self.cellType = cellType || 'wall';
	var cellGraphics;
	if (self.cellType === 'wall') {
		cellGraphics = self.attachAsset('wall', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (self.cellType === 'path') {
		cellGraphics = self.attachAsset('path', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else if (self.cellType === 'blackhole') {
		cellGraphics = self.attachAsset('blackhole', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	}
	return self;
});

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

/**** 
* Game Code
****/ 
var ball;
var maze = [];
var mazeWidth = 20;
var mazeHeight = 30;
var cellSize = 60;
var mazeContainer;
var blackholeX, blackholeY;
var timeLeft = 60;
var gameWon = false;
// UI Elements
var timerText = new Text2('60', {
	size: 80,
	fill: 0xFFFFFF
});
timerText.anchor.set(0.5, 0);
LK.gui.top.addChild(timerText);
var scoreText = new Text2('Level: 1', {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0, 0);
scoreText.x = 150;
scoreText.y = 20;
LK.gui.topLeft.addChild(scoreText);
// Initialize maze container
mazeContainer = game.addChild(new Container());
mazeContainer.x = (2048 - mazeWidth * cellSize) / 2;
mazeContainer.y = (2732 - mazeHeight * cellSize) / 2;
// Generate initial maze
function generateMaze() {
	// Clear existing maze
	for (var i = 0; i < maze.length; i++) {
		for (var j = 0; j < maze[i].length; j++) {
			if (maze[i][j]) {
				maze[i][j].destroy();
			}
		}
	}
	maze = [];
	// Initialize maze grid (all walls initially)
	var mazeGrid = [];
	for (var y = 0; y < mazeHeight; y++) {
		mazeGrid[y] = [];
		maze[y] = [];
		for (var x = 0; x < mazeWidth; x++) {
			// 0 = wall, 1 = path, 2 = visited
			mazeGrid[y][x] = 0;
			maze[y][x] = null;
		}
	}
	// Recursive backtracking maze generation
	var stack = [];
	var currentX = 1;
	var currentY = 1;
	mazeGrid[currentY][currentX] = 1; // Mark starting cell as path
	stack.push({
		x: currentX,
		y: currentY
	});
	while (stack.length > 0) {
		var neighbors = [];
		var directions = [{
			x: 0,
			y: -2
		},
		// North
		{
			x: 2,
			y: 0
		},
		// East
		{
			x: 0,
			y: 2
		},
		// South
		{
			x: -2,
			y: 0
		} // West
		];
		// Find unvisited neighbors
		for (var i = 0; i < directions.length; i++) {
			var nx = currentX + directions[i].x;
			var ny = currentY + directions[i].y;
			if (nx > 0 && nx < mazeWidth - 1 && ny > 0 && ny < mazeHeight - 1 && mazeGrid[ny][nx] === 0) {
				neighbors.push({
					x: nx,
					y: ny,
					dir: directions[i]
				});
			}
		}
		if (neighbors.length > 0) {
			// Choose random neighbor
			var randomNeighbor = neighbors[Math.floor(Math.random() * neighbors.length)];
			var nextX = randomNeighbor.x;
			var nextY = randomNeighbor.y;
			var wallX = currentX + randomNeighbor.dir.x / 2;
			var wallY = currentY + randomNeighbor.dir.y / 2;
			// Remove wall between current and next cell
			mazeGrid[wallY][wallX] = 1;
			mazeGrid[nextY][nextX] = 1;
			// Move to next cell
			currentX = nextX;
			currentY = nextY;
			stack.push({
				x: currentX,
				y: currentY
			});
		} else {
			// Backtrack
			var prev = stack.pop();
			if (stack.length > 0) {
				currentX = stack[stack.length - 1].x;
				currentY = stack[stack.length - 1].y;
			}
		}
	}
	// Add some random openings for better gameplay
	for (var y = 2; y < mazeHeight - 2; y += 2) {
		for (var x = 2; x < mazeWidth - 2; x += 2) {
			if (Math.random() < 0.15) {
				// Create random opening
				var openingDirs = [{
					x: 1,
					y: 0
				}, {
					x: -1,
					y: 0
				}, {
					x: 0,
					y: 1
				}, {
					x: 0,
					y: -1
				}];
				var randomDir = openingDirs[Math.floor(Math.random() * openingDirs.length)];
				var openX = x + randomDir.x;
				var openY = y + randomDir.y;
				if (openX > 0 && openX < mazeWidth - 1 && openY > 0 && openY < mazeHeight - 1) {
					mazeGrid[openY][openX] = 1;
				}
			}
		}
	}
	// Create visual maze from grid
	for (var y = 0; y < mazeHeight; y++) {
		for (var x = 0; x < mazeWidth; x++) {
			var cellType = mazeGrid[y][x] === 1 ? 'path' : 'wall';
			var cell = new MazeCell(cellType);
			cell.x = x * cellSize + cellSize / 2;
			cell.y = y * cellSize + cellSize / 2;
			maze[y][x] = cell;
			mazeContainer.addChild(cell);
		}
	}
	// Place black hole exit
	placeBlackHole();
}
function placeBlackHole() {
	// Find all path cells in the bottom row only
	var pathCells = [];
	var bottomY = mazeHeight - 2; // Second to last row (avoid the outer wall)
	for (var x = 1; x < mazeWidth - 1; x++) {
		if (maze[bottomY][x].cellType === 'path') {
			pathCells.push({
				x: x,
				y: bottomY,
				neighbors: 1
			});
		}
	}
	// If no path cells found in bottom row, create one by forcing a path
	if (pathCells.length === 0) {
		// Find middle of bottom row and force it to be a path
		var middleX = Math.floor(mazeWidth / 2);
		if (maze[bottomY][middleX]) {
			maze[bottomY][middleX].destroy();
			var pathCell = new MazeCell('path');
			pathCell.x = middleX * cellSize + cellSize / 2;
			pathCell.y = bottomY * cellSize + cellSize / 2;
			maze[bottomY][middleX] = pathCell;
			mazeContainer.addChild(pathCell);
			pathCells.push({
				x: middleX,
				y: bottomY,
				neighbors: 1
			});
		}
	}
	if (pathCells.length > 0) {
		// Choose random path cell from bottom row
		var randomPath = pathCells[Math.floor(Math.random() * pathCells.length)];
		blackholeX = randomPath.x;
		blackholeY = randomPath.y;
		// Replace path with black hole
		maze[blackholeY][blackholeX].destroy();
		var blackhole = new MazeCell('blackhole');
		blackhole.x = blackholeX * cellSize + cellSize / 2;
		blackhole.y = blackholeY * cellSize + cellSize / 2;
		maze[blackholeY][blackholeX] = blackhole;
		mazeContainer.addChild(blackhole);
	}
}
function checkBallCollisions() {
	var ballMazeX = Math.floor((ball.x - mazeContainer.x) / cellSize);
	var ballMazeY = Math.floor((ball.y - mazeContainer.y) / cellSize);
	// Check bounds
	if (ballMazeX < 0 || ballMazeX >= mazeWidth || ballMazeY < 0 || ballMazeY >= mazeHeight) {
		// Bounce off screen edges
		if (ball.x < mazeContainer.x) {
			ball.x = mazeContainer.x;
			ball.velocityX = Math.abs(ball.velocityX) * ball.bounceForce;
		}
		if (ball.x > mazeContainer.x + mazeWidth * cellSize) {
			ball.x = mazeContainer.x + mazeWidth * cellSize;
			ball.velocityX = -Math.abs(ball.velocityX) * ball.bounceForce;
		}
		if (ball.y < mazeContainer.y) {
			ball.y = mazeContainer.y;
			ball.velocityY = Math.abs(ball.velocityY) * ball.bounceForce;
		}
		if (ball.y > mazeContainer.y + mazeHeight * cellSize) {
			ball.y = mazeContainer.y + mazeHeight * cellSize;
			ball.velocityY = -Math.abs(ball.velocityY) * ball.bounceForce;
		}
		return;
	}
	var currentCell = maze[ballMazeY][ballMazeX];
	if (currentCell && currentCell.cellType === 'wall') {
		// Bounce off wall
		var cellCenterX = mazeContainer.x + ballMazeX * cellSize + cellSize / 2;
		var cellCenterY = mazeContainer.y + ballMazeY * cellSize + cellSize / 2;
		var deltaX = ball.x - cellCenterX;
		var deltaY = ball.y - cellCenterY;
		if (Math.abs(deltaX) > Math.abs(deltaY)) {
			ball.velocityX = deltaX > 0 ? Math.abs(ball.velocityX) * ball.bounceForce : -Math.abs(ball.velocityX) * ball.bounceForce;
			ball.x = cellCenterX + (deltaX > 0 ? cellSize / 2 + 20 : -cellSize / 2 - 20);
		} else {
			ball.velocityY = deltaY > 0 ? Math.abs(ball.velocityY) * ball.bounceForce : -Math.abs(ball.velocityY) * ball.bounceForce;
			ball.y = cellCenterY + (deltaY > 0 ? cellSize / 2 + 20 : -cellSize / 2 - 20);
		}
		LK.getSound('bounce').play();
	} else if (currentCell && currentCell.cellType === 'blackhole') {
		// Check if ball is close enough to black hole center
		var blackholeCenterX = mazeContainer.x + blackholeX * cellSize + cellSize / 2;
		var blackholeCenterY = mazeContainer.y + blackholeY * cellSize + cellSize / 2;
		var distance = Math.sqrt(Math.pow(ball.x - blackholeCenterX, 2) + Math.pow(ball.y - blackholeCenterY, 2));
		if (distance < 30 && !gameWon) {
			gameWon = true;
			LK.getSound('win').play();
			LK.setScore(LK.getScore() + 1);
			scoreText.setText('Level: ' + (LK.getScore() + 1));
			// Flash effect
			LK.effects.flashScreen(0x00ff00, 1000);
			// Reset for next level
			LK.setTimeout(function () {
				resetLevel();
			}, 1000);
		}
	}
}
function resetLevel() {
	gameWon = false;
	timeLeft = 60;
	// Reset ball position
	ball.x = mazeContainer.x + cellSize * 1.5;
	ball.y = mazeContainer.y + cellSize * 1.5;
	ball.velocityX = 0;
	ball.velocityY = 0;
	// Generate new maze
	generateMaze();
}
// Initialize ball
ball = game.addChild(new Ball());
ball.x = mazeContainer.x + cellSize * 1.5;
ball.y = mazeContainer.y + cellSize * 1.5;
// Touch controls
game.down = function (x, y, obj) {
	if (gameWon) return;
	// Tap to jump/bounce upward
	var jumpForce = -12; // Negative for upward movement
	ball.addForce(0, jumpForce);
};
// Generate initial maze
generateMaze();
// Timer countdown
var timerInterval = LK.setInterval(function () {
	if (gameWon) return;
	timeLeft--;
	timerText.setText(timeLeft.toString());
	if (timeLeft <= 0) {
		timeLeft = 60;
		generateMaze();
		timerText.setText('60');
		// Flash red to indicate maze change
		LK.effects.flashScreen(0xff0000, 500);
	}
}, 1000);
game.update = function () {
	// Game updates are handled by individual object update methods
};

===================================================================
--- original.js
+++ change.js
@@ -235,70 +235,41 @@
 	// Place black hole exit
 	placeBlackHole();
 }
 function placeBlackHole() {
-	// Find all path cells in bottom third for better challenge
+	// Find all path cells in the bottom row only
 	var pathCells = [];
-	var startY = Math.floor(mazeHeight * 0.6); // Bottom 40% of maze
-	for (var y = startY; y < mazeHeight - 1; y++) {
-		for (var x = 1; x < mazeWidth - 1; x++) {
-			if (maze[y][x].cellType === 'path') {
-				// Check if it's not at a dead end (has multiple path neighbors)
-				var pathNeighbors = 0;
-				var neighbors = [{
-					x: x - 1,
-					y: y
-				}, {
-					x: x + 1,
-					y: y
-				}, {
-					x: x,
-					y: y - 1
-				}, {
-					x: x,
-					y: y + 1
-				}];
-				for (var i = 0; i < neighbors.length; i++) {
-					var nx = neighbors[i].x;
-					var ny = neighbors[i].y;
-					if (nx >= 0 && nx < mazeWidth && ny >= 0 && ny < mazeHeight) {
-						if (maze[ny][nx].cellType === 'path') {
-							pathNeighbors++;
-						}
-					}
-				}
-				// Prefer locations with 2+ path neighbors (not dead ends)
-				if (pathNeighbors >= 2) {
-					pathCells.push({
-						x: x,
-						y: y,
-						neighbors: pathNeighbors
-					});
-				}
-			}
+	var bottomY = mazeHeight - 2; // Second to last row (avoid the outer wall)
+	for (var x = 1; x < mazeWidth - 1; x++) {
+		if (maze[bottomY][x].cellType === 'path') {
+			pathCells.push({
+				x: x,
+				y: bottomY,
+				neighbors: 1
+			});
 		}
 	}
-	// If no good locations found, use any path cell in bottom half
+	// If no path cells found in bottom row, create one by forcing a path
 	if (pathCells.length === 0) {
-		for (var y = Math.floor(mazeHeight / 2); y < mazeHeight - 1; y++) {
-			for (var x = 1; x < mazeWidth - 1; x++) {
-				if (maze[y][x].cellType === 'path') {
-					pathCells.push({
-						x: x,
-						y: y,
-						neighbors: 1
-					});
-				}
-			}
+		// Find middle of bottom row and force it to be a path
+		var middleX = Math.floor(mazeWidth / 2);
+		if (maze[bottomY][middleX]) {
+			maze[bottomY][middleX].destroy();
+			var pathCell = new MazeCell('path');
+			pathCell.x = middleX * cellSize + cellSize / 2;
+			pathCell.y = bottomY * cellSize + cellSize / 2;
+			maze[bottomY][middleX] = pathCell;
+			mazeContainer.addChild(pathCell);
+			pathCells.push({
+				x: middleX,
+				y: bottomY,
+				neighbors: 1
+			});
 		}
 	}
 	if (pathCells.length > 0) {
-		// Prefer locations with more neighbors for better gameplay
-		pathCells.sort(function (a, b) {
-			return b.neighbors - a.neighbors;
-		});
-		var topCandidates = pathCells.slice(0, Math.min(5, pathCells.length));
-		var randomPath = topCandidates[Math.floor(Math.random() * topCandidates.length)];
+		// Choose random path cell from bottom row
+		var randomPath = pathCells[Math.floor(Math.random() * pathCells.length)];
 		blackholeX = randomPath.x;
 		blackholeY = randomPath.y;
 		// Replace path with black hole
 		maze[blackholeY][blackholeX].destroy();