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

/**** 
* Classes
****/ 
// Candy class
var Candy = Container.expand(function () {
	var self = Container.call(this);
	// Properties
	self.type = getRandomCandyType();
	self.special = SPECIAL_NONE;
	self.blocker = BLOCKER_NONE;
	self.row = 0;
	self.col = 0;
	self.isFalling = false;
	self.isMatched = false;
	self.isSelected = false;
	self.asset = null;
	// Attach asset
	function updateAsset() {
		if (self.asset) {
			self.removeChild(self.asset);
			self.asset.destroy();
		}
		var assetId = self.type;
		if (self.special === SPECIAL_STRIPED) assetId = 'candy_striped';
		if (self.special === SPECIAL_BOMB) assetId = 'candy_bomb';
		if (self.special === SPECIAL_RAINBOW) assetId = 'candy_rainbow';
		if (self.blocker === BLOCKER_CHOCOLATE) assetId = 'blocker_chocolate';
		if (self.blocker === BLOCKER_ICE) assetId = 'blocker_ice';
		self.asset = self.attachAsset(assetId, {
			anchorX: 0.5,
			anchorY: 0.5
		});
		if (self.isSelected) {
			self.asset.scaleX = 1.15;
			self.asset.scaleY = 1.15;
		} else {
			self.asset.scaleX = 1;
			self.asset.scaleY = 1;
		}
	}
	// Set type
	self.setType = function (type, special, blocker) {
		self.type = type || getRandomCandyType();
		self.special = special || SPECIAL_NONE;
		self.blocker = blocker || BLOCKER_NONE;
		updateAsset();
	};
	// Set selected
	self.setSelected = function (selected) {
		self.isSelected = selected;
		updateAsset();
	};
	// Animate to position
	self.moveTo = function (x, y, duration, onFinish) {
		tween(self, {
			x: x,
			y: y
		}, {
			duration: duration || 200,
			easing: tween.easeInOut,
			onFinish: onFinish
		});
	};
	// Destroy
	self.destroyCandy = function () {
		if (self.asset) {
			self.removeChild(self.asset);
			self.asset.destroy();
			self.asset = null;
		}
		self.destroy();
	};
	// Init
	updateAsset();
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222244
});

/**** 
* Game Code
****/ 
// Board data
// Candy shapes/colors
// Special candies
// Blockers
// Sounds
// Music
// Candy types
var CANDY_TYPES = ['candy_red', 'candy_green', 'candy_blue', 'candy_yellow', 'candy_purple', 'candy_orange'];
// Special types
var SPECIAL_NONE = 0;
var SPECIAL_STRIPED = 1;
var SPECIAL_BOMB = 2;
var SPECIAL_RAINBOW = 3;
// Blocker types
var BLOCKER_NONE = 0;
var BLOCKER_CHOCOLATE = 1;
var BLOCKER_ICE = 2;
// Board size (BIGGER, fits screen better)
var BOARD_COLS = 7;
var BOARD_ROWS = 9;
var CELL_SIZE = 250; // match asset size so candies are adjacent
var BOARD_OFFSET_X = Math.floor((2048 - BOARD_COLS * CELL_SIZE) / 2);
var BOARD_OFFSET_Y = 120; // move up, fits on tall screens
// Helper: get random candy type
function getRandomCandyType() {
	return CANDY_TYPES[Math.floor(Math.random() * CANDY_TYPES.length)];
}
// Helper: get random int
function randInt(a, b) {
	return a + Math.floor(Math.random() * (b - a + 1));
}
var board = [];
var candies = [];
var selectedCandy = null;
var swapping = false;
var animating = false;
// Level system
// Level design: early levels are easy, later levels are harder and require more skill
// Unique level designs for variety and gameplay changes
var levels = [
// Level 1: Classic match-3, no blockers, easy intro
{
	moves: 20,
	target: 400,
	blockers: [],
	description: "Classic: No blockers, just match candies!"
},
// Level 2: Chocolate row in the middle, must clear to progress
{
	moves: 18,
	target: 600,
	blockers: [{
		row: 4,
		type: BLOCKER_CHOCOLATE
	}],
	description: "Chocolate row blocks the center. Clear it!"
},
// Level 3: Ice on the bottom, candies drop slower (simulate by more blockers)
{
	moves: 16,
	target: 800,
	blockers: [{
		row: 7,
		type: BLOCKER_ICE
	}, {
		row: 8,
		type: BLOCKER_ICE
	}],
	description: "Frozen bottom! Break the ice to win."
},
// Level 4: Alternating chocolate and ice, zig-zag pattern
{
	moves: 15,
	target: 1000,
	blockers: [{
		row: 2,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 3,
		type: BLOCKER_ICE
	}, {
		row: 4,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 5,
		type: BLOCKER_ICE
	}],
	description: "Zig-zag blockers! Plan your matches."
},
// Level 5: Boss - chocolate and ice checkerboard, higher target
{
	moves: 14,
	target: 1400,
	blockers: [{
		row: 2,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 3,
		type: BLOCKER_ICE
	}, {
		row: 4,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 5,
		type: BLOCKER_ICE
	}, {
		row: 6,
		type: BLOCKER_CHOCOLATE
	}],
	description: "Boss: Checkerboard blockers! Big challenge."
},
// Level 6: Cross and diamond of ice, with chocolate corners
{
	moves: 13,
	target: 1700,
	blockers: [{
		row: 0,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 4,
		type: BLOCKER_ICE
	}, {
		row: 8,
		type: BLOCKER_CHOCOLATE
	}],
	description: "Cross & diamond of ice, chocolate corners. Break through!"
},
// Level 7: Chocolate on the sides, ice in the center, U-shape at bottom
{
	moves: 12,
	target: 1900,
	blockers: [{
		row: 0,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 8,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 4,
		type: BLOCKER_ICE
	}, {
		row: 7,
		type: BLOCKER_ICE
	}],
	description: "Sides blocked by chocolate, center by ice, U-shape at bottom."
},
// Level 8: Alternating rows of blockers, vertical stripe in center, random chocolate
{
	moves: 12,
	target: 2100,
	blockers: [{
		row: 1,
		type: BLOCKER_ICE
	}, {
		row: 3,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 5,
		type: BLOCKER_ICE
	}, {
		row: 7,
		type: BLOCKER_CHOCOLATE
	}],
	description: "Alternating blockers, vertical stripe in center, random chocolate."
},
// Level 9: Spiral blockers, spiral arm from bottom right, random ice
{
	moves: 11,
	target: 2400,
	blockers: [{
		row: 0,
		type: BLOCKER_ICE
	}, {
		row: 1,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 2,
		type: BLOCKER_ICE
	}, {
		row: 3,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 4,
		type: BLOCKER_ICE
	}, {
		row: 5,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 6,
		type: BLOCKER_ICE
	}, {
		row: 7,
		type: BLOCKER_CHOCOLATE
	}],
	description: "Spiral blockers! Can you break out? Watch for spiral arms."
},
// Level 10: Boss - nearly every row blocked, zig-zag path open, random blockers
{
	moves: 10,
	target: 3000,
	blockers: [{
		row: 0,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 1,
		type: BLOCKER_ICE
	}, {
		row: 2,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 3,
		type: BLOCKER_ICE
	}, {
		row: 4,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 5,
		type: BLOCKER_ICE
	}, {
		row: 6,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 7,
		type: BLOCKER_ICE
	}, {
		row: 8,
		type: BLOCKER_CHOCOLATE
	}],
	description: "Boss: Nearly full blockers! Survive the gauntlet, zig-zag path open."
},
// Level 11: Hollow square of chocolate, ice in the center
{
	moves: 13,
	target: 3500,
	blockers: [{
		row: 0,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 1,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 2,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 6,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 7,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 8,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 4,
		type: BLOCKER_ICE
	}],
	description: "Hollow chocolate square, ice in the center. Break the fortress!"
},
// Level 12: Diagonal chocolate, anti-diagonal ice
{
	moves: 12,
	target: 4000,
	blockers: [{
		row: 0,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 1,
		type: BLOCKER_ICE
	}, {
		row: 2,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 3,
		type: BLOCKER_ICE
	}, {
		row: 4,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 5,
		type: BLOCKER_ICE
	}, {
		row: 6,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 7,
		type: BLOCKER_ICE
	}, {
		row: 8,
		type: BLOCKER_CHOCOLATE
	}],
	description: "Diagonal chocolate, anti-diagonal ice. Diagonal thinking required!"
},
// Level 13: Center cross of chocolate, outer ring of ice
{
	moves: 11,
	target: 4500,
	blockers: [{
		row: 0,
		type: BLOCKER_ICE
	}, {
		row: 1,
		type: BLOCKER_ICE
	}, {
		row: 2,
		type: BLOCKER_ICE
	}, {
		row: 3,
		type: BLOCKER_ICE
	}, {
		row: 4,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 5,
		type: BLOCKER_ICE
	}, {
		row: 6,
		type: BLOCKER_ICE
	}, {
		row: 7,
		type: BLOCKER_ICE
	}, {
		row: 8,
		type: BLOCKER_ICE
	}],
	description: "Center cross of chocolate, outer ring of ice. Break the cross!"
},
// Level 14: Random blockers, every other column
{
	moves: 10,
	target: 5000,
	blockers: [{
		row: 2,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 4,
		type: BLOCKER_ICE
	}, {
		row: 6,
		type: BLOCKER_CHOCOLATE
	}],
	description: "Random blockers, every other column. Unpredictable fun!"
},
// Level 15: Boss - alternating chocolate and ice, spiral and cross
{
	moves: 9,
	target: 6000,
	blockers: [{
		row: 0,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 1,
		type: BLOCKER_ICE
	}, {
		row: 2,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 3,
		type: BLOCKER_ICE
	}, {
		row: 4,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 5,
		type: BLOCKER_ICE
	}, {
		row: 6,
		type: BLOCKER_CHOCOLATE
	}, {
		row: 7,
		type: BLOCKER_ICE
	}, {
		row: 8,
		type: BLOCKER_CHOCOLATE
	}],
	description: "Boss: Alternating blockers, spiral and cross. The ultimate challenge!"
}];
var currentLevel = typeof storage.currentLevel !== "undefined" ? storage.currentLevel : 0;
var movesLeft = typeof storage.movesLeft !== "undefined" ? storage.movesLeft : levels[currentLevel].moves;
var targetScore = levels[currentLevel].target;
var score = typeof storage.score !== "undefined" ? storage.score : 0;
var scoreTxt = null;
var movesTxt = null;
var targetTxt = null;
var boardContainer = null;
var matchQueue = [];
var refillQueue = [];
var isProcessing = false;
// GUI
scoreTxt = new Text2('Score: 0', {
	size: 90,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
movesTxt = new Text2('Moves: 20', {
	size: 70,
	fill: "#fff"
});
movesTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(movesTxt);
movesTxt.y = 110;
targetTxt = new Text2('Target: 5000', {
	size: 60,
	fill: "#fff"
});
targetTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(targetTxt);
targetTxt.y = 180;
// Board container
boardContainer = new Container();
game.addChild(boardContainer);
boardContainer.x = BOARD_OFFSET_X;
boardContainer.y = BOARD_OFFSET_Y;
// Initialize board
function initBoard() {
	// Change background color for each level for a more enjoyable and dynamic background
	var bgColors = [0x222244,
	// deep blue
	0x2a3d55,
	// blue-gray
	0x3b2a55,
	// purple
	0x2a5544,
	// teal
	0x55442a,
	// brown
	0x44552a,
	// olive
	0x2a5555,
	// cyan
	0x552a3b,
	// magenta
	0x2a2a55,
	// indigo
	0x552a2a,
	// red
	0x2a552a,
	// green
	0x55552a,
	// yellow
	0x2a4455,
	// blue-green
	0x552a44,
	// pink
	0x444444 // gray
	];
	// Pick a color based on currentLevel, cycle if more levels than colors
	game.setBackgroundColor(bgColors[currentLevel % bgColors.length]);
	// Clear previous
	for (var i = 0; i < candies.length; ++i) {
		if (candies[i]) candies[i].destroyCandy();
	}
	candies = [];
	board = [];
	for (var row = 0; row < BOARD_ROWS; ++row) {
		board[row] = [];
		for (var col = 0; col < BOARD_COLS; ++col) {
			var candy = new Candy();
			candy.row = row;
			candy.col = col;
			candy.x = col * CELL_SIZE + CELL_SIZE / 2;
			candy.y = row * CELL_SIZE + CELL_SIZE / 2;
			// Unique blocker logic per level
			var blockers = levels[currentLevel].blockers;
			var placedBlocker = false;
			// Guarantee at least one open path per row for passability
			// We'll use a random openCol for each row, but keep it consistent for the row
			var openCol = -1;
			if (blockers.length > 0) {
				// For each row, pick a random open column (or center for symmetry)
				openCol = Math.floor(BOARD_COLS / 2);
				// For more variety, you could use: openCol = randInt(0, BOARD_COLS - 1);
			}
			for (var b = 0; b < blockers.length; ++b) {
				if (row === blockers[b].row) {
					// Level-specific patterns
					// Level 5/10: checkerboard, but add a diagonal line of blockers for extra challenge
					if ((currentLevel === 4 || currentLevel === 9) && ((row + col) % 2 === 0 || row === col)) {
						// Always leave openCol open
						if (col !== openCol) {
							candy.setType(candy.type, SPECIAL_NONE, blockers[b].type);
							placedBlocker = true;
						}
					}
					// Level 6: cross pattern, but add a diamond shape in the center
					else if (currentLevel === 5 && (col === Math.floor(BOARD_COLS / 2) || row === Math.floor(BOARD_ROWS / 2) || Math.abs(col - Math.floor(BOARD_COLS / 2)) === Math.abs(row - Math.floor(BOARD_ROWS / 2)) && Math.abs(col - Math.floor(BOARD_COLS / 2)) <= 2)) {
						if (col !== openCol) {
							candy.setType(candy.type, SPECIAL_NONE, blockers[b].type);
							placedBlocker = true;
						}
					}
					// Level 7: chocolate on sides, ice in center, but add blockers in a U shape at the bottom
					else if (currentLevel === 6 && ((row === 0 || row === BOARD_ROWS - 1) && blockers[b].type === BLOCKER_CHOCOLATE && (col === 0 || col === BOARD_COLS - 1) || row >= BOARD_ROWS - 3 && (col === 0 || col === BOARD_COLS - 1 || row === BOARD_ROWS - 1 && col > 0 && col < BOARD_COLS - 1))) {
						if (col !== openCol) {
							candy.setType(candy.type, SPECIAL_NONE, blockers[b].type);
							placedBlocker = true;
						}
					}
					// Level 8: alternating rows, but add a vertical stripe in the center
					else if (currentLevel === 7 && (row % 2 === b % 2 || col === Math.floor(BOARD_COLS / 2))) {
						if (col !== openCol) {
							candy.setType(candy.type, SPECIAL_NONE, blockers[b].type);
							placedBlocker = true;
						}
					}
					// Level 9: spiral (simulate with increasing rows), but add a spiral arm from the bottom right
					else if (currentLevel === 8 && (col >= row && col < BOARD_COLS - row || row + col === BOARD_COLS + BOARD_ROWS - 2 - row && row > BOARD_ROWS / 2)) {
						if (col !== openCol) {
							candy.setType(candy.type, SPECIAL_NONE, blockers[b].type);
							placedBlocker = true;
						}
					}
					// Level 10: nearly every row blocked, but leave a zig-zag path open
					else if (currentLevel === 9 && !((row + col) % 2 === 1 && col !== 0 && col !== BOARD_COLS - 1)) {
						if (col !== openCol) {
							candy.setType(candy.type, SPECIAL_NONE, blockers[b].type);
							placedBlocker = true;
						}
					}
					// Default: alternate blockers on even/odd columns for variety, but add a random chance for double blockers
					else if (!placedBlocker && (blockers[b].type === BLOCKER_CHOCOLATE && col % 2 === 0 || blockers[b].type === BLOCKER_ICE && col % 2 === 1 || Math.random() < 0.07)) {
						if (col !== openCol) {
							candy.setType(candy.type, SPECIAL_NONE, blockers[b].type);
							placedBlocker = true;
						}
					}
				}
			}
			boardContainer.addChild(candy);
			candies.push(candy);
			board[row][col] = candy;
		}
	}
	// Remove initial matches
	removeInitialMatches();
}
// Remove initial matches to avoid auto-matches at start
function removeInitialMatches() {
	for (var row = 0; row < BOARD_ROWS; ++row) {
		for (var col = 0; col < BOARD_COLS; ++col) {
			var type = board[row][col].type;
			// Check left
			if (col >= 2 && board[row][col - 1].type === type && board[row][col - 2].type === type) {
				var newType = getRandomCandyType();
				while (newType === type) newType = getRandomCandyType();
				board[row][col].setType(newType);
			}
			// Check up
			if (row >= 2 && board[row - 1][col].type === type && board[row - 2][col].type === type) {
				var newType = getRandomCandyType();
				while (newType === type) newType = getRandomCandyType();
				board[row][col].setType(newType);
			}
		}
	}
}
// Get candy at board position
function getCandyAt(row, col) {
	if (row < 0 || row >= BOARD_ROWS || col < 0 || col >= BOARD_COLS) return null;
	return board[row][col];
}
// Swap two candies
function swapCandies(c1, c2, cb) {
	swapping = true;
	var r1 = c1.row,
		c1c = c1.col,
		r2 = c2.row,
		c2c = c2.col;
	// Swap in board
	board[r1][c1c] = c2;
	board[r2][c2c] = c1;
	// Swap row/col
	var tmpRow = c1.row,
		tmpCol = c1.col;
	c1.row = r2;
	c1.col = c2c;
	c2.row = r1;
	c2.col = c1c;
	// Ensure board and candies are in sync after swap
	board[c1.row][c1.col] = c1;
	board[c2.row][c2.col] = c2;
	// Animate
	var done = 0;
	c1.moveTo(c1.col * CELL_SIZE + CELL_SIZE / 2, c1.row * CELL_SIZE + CELL_SIZE / 2, 180, function () {
		done++;
		if (done === 2 && cb) {
			swapping = false;
			cb();
		}
	});
	c2.moveTo(c2.col * CELL_SIZE + CELL_SIZE / 2, c2.row * CELL_SIZE + CELL_SIZE / 2, 180, function () {
		done++;
		if (done === 2 && cb) {
			swapping = false;
			cb();
		}
	});
	LK.getSound('swap').play();
}
// Check if two candies are adjacent
function areAdjacent(c1, c2) {
	var dr = Math.abs(c1.row - c2.row);
	var dc = Math.abs(c1.col - c2.col);
	// Allow swapping in all four directions (up, down, left, right)
	return dr === 1 && dc === 0 || dr === 0 && dc === 1;
}
// Find all matches on the board, including special candy creation
function findMatches() {
	var matches = [];
	var matchGroups = []; // For special candy creation
	// Horizontal
	for (var row = 0; row < BOARD_ROWS; ++row) {
		var count = 1;
		var startCol = 0;
		for (var col = 1; col < BOARD_COLS; ++col) {
			var prev = board[row][col - 1];
			var curr = board[row][col];
			if (curr.type === prev.type && curr.blocker === BLOCKER_NONE && prev.blocker === BLOCKER_NONE) {
				count++;
			} else {
				if (count >= 3) {
					var group = [];
					for (var k = 0; k < count; ++k) {
						group.push(board[row][col - 1 - k]);
					}
					matches = matches.concat(group);
					matchGroups.push(group);
				}
				count = 1;
				startCol = col;
			}
		}
		if (count >= 3) {
			var group = [];
			for (var k = 0; k < count; ++k) {
				group.push(board[row][BOARD_COLS - 1 - k]);
			}
			matches = matches.concat(group);
			matchGroups.push(group);
		}
	}
	// Vertical
	for (var col = 0; col < BOARD_COLS; ++col) {
		var count = 1;
		var startRow = 0;
		for (var row = 1; row < BOARD_ROWS; ++row) {
			var prev = board[row - 1][col];
			var curr = board[row][col];
			if (curr.type === prev.type && curr.blocker === BLOCKER_NONE && prev.blocker === BLOCKER_NONE) {
				count++;
			} else {
				if (count >= 3) {
					var group = [];
					for (var k = 0; k < count; ++k) {
						group.push(board[row - 1 - k][col]);
					}
					matches = matches.concat(group);
					matchGroups.push(group);
				}
				count = 1;
				startRow = row;
			}
		}
		if (count >= 3) {
			var group = [];
			for (var k = 0; k < count; ++k) {
				group.push(board[BOARD_ROWS - 1 - k][col]);
			}
			matches = matches.concat(group);
			matchGroups.push(group);
		}
	}
	// Detect 2x2 square matches and mark for bomb
	for (var row = 0; row < BOARD_ROWS - 1; ++row) {
		for (var col = 0; col < BOARD_COLS - 1; ++col) {
			var c1 = board[row][col];
			var c2 = board[row][col + 1];
			var c3 = board[row + 1][col];
			var c4 = board[row + 1][col + 1];
			if (c1.type === c2.type && c1.type === c3.type && c1.type === c4.type && c1.blocker === BLOCKER_NONE && c2.blocker === BLOCKER_NONE && c3.blocker === BLOCKER_NONE && c4.blocker === BLOCKER_NONE) {
				// Only add if not already in a match group for this square
				var alreadyMatched = false;
				for (var mg = 0; mg < matchGroups.length; ++mg) {
					var g = matchGroups[mg];
					if (g.indexOf(c1) !== -1 && g.indexOf(c2) !== -1 && g.indexOf(c3) !== -1 && g.indexOf(c4) !== -1) {
						alreadyMatched = true;
						break;
					}
				}
				if (!alreadyMatched) {
					// Mark the top-left as bomb, others as normal
					c1.special = SPECIAL_BOMB;
					c1.setType(c1.type, SPECIAL_BOMB, c1.blocker);
					// Remove c1 from matches so it is not destroyed, but destroy the other 3
					var group = [c2, c3, c4];
					matches = matches.concat(group);
					matchGroups.push([c1, c2, c3, c4]);
					// Store a flag for c1 to trigger a special 2x2 bomb explosion in removeMatches
					c1._pendingSquareBomb = true;
				}
			}
		}
	}
	// Remove duplicates
	var unique = [];
	for (var i = 0; i < matches.length; ++i) {
		if (unique.indexOf(matches[i]) === -1) unique.push(matches[i]);
	}
	// Mark special candy creation (striped, bomb, rainbow)
	for (var g = 0; g < matchGroups.length; ++g) {
		var group = matchGroups[g];
		if (group.length === 4) {
			// Striped candy: horizontal or vertical
			var isHorizontal = group[0].row === group[1].row;
			var specialCandy = group[1]; // Place special at second in group
			if (specialCandy.special === SPECIAL_NONE) {
				specialCandy.special = SPECIAL_STRIPED;
				specialCandy.setType(specialCandy.type, SPECIAL_STRIPED, specialCandy.blocker);
				// Mark orientation for correct effect
				specialCandy._stripedOrientation = isHorizontal ? "horizontal" : "vertical";
			}
			// Remove the special candy from the group so it is not destroyed
			for (var i = 0; i < group.length; ++i) {
				if (group[i] === specialCandy) {
					group.splice(i, 1);
					break;
				}
			}
		}
		if (group.length === 5) {
			// Color bomb (rainbow) only for exactly 5-in-a-row
			var specialCandy = group[Math.floor(group.length / 2)]; // Place in the middle
			if (specialCandy.special === SPECIAL_NONE) {
				specialCandy.special = SPECIAL_RAINBOW;
				specialCandy.setType(specialCandy.type, SPECIAL_RAINBOW, specialCandy.blocker);
			}
			// Remove the special candy from the group so it is not destroyed
			for (var i = 0; i < group.length; ++i) {
				if (group[i] === specialCandy) {
					group.splice(i, 1);
					break;
				}
			}
		}
	}
	// Bomb candy for T or L shape
	// Find intersections of horizontal and vertical matches
	for (var i = 0; i < matchGroups.length; ++i) {
		var groupA = matchGroups[i];
		if (groupA.length !== 3) continue;
		for (var j = i + 1; j < matchGroups.length; ++j) {
			var groupB = matchGroups[j];
			if (groupB.length !== 3) continue;
			// Check for intersection
			for (var a = 0; a < 3; ++a) {
				for (var b = 0; b < 3; ++b) {
					if (groupA[a] === groupB[b]) {
						// Place bomb at intersection
						var bombCandy = groupA[a];
						if (bombCandy.special === SPECIAL_NONE) {
							bombCandy.special = SPECIAL_BOMB;
							bombCandy.setType(bombCandy.type, SPECIAL_BOMB, bombCandy.blocker);
						}
					}
				}
			}
		}
	}
	return unique;
}
// Remove matched candies and animate, including special candy activation and blockers
function removeMatches(matches, cb) {
	if (!matches || matches.length === 0) {
		if (cb) cb();
		return;
	}
	LK.getSound('match').play();
	var done = 0;
	var toRemove = [];
	// Activate special candies in matches
	for (var i = 0; i < matches.length; ++i) {
		var candy = matches[i];
		if (candy.special === SPECIAL_STRIPED) {
			// Striped candy: clear row if created from horizontal match, column if from vertical
			// Determine orientation by checking if the special was created from a horizontal or vertical match
			// We'll use a property set during match detection, or fallback to random if not set (legacy)
			var isHorizontal = false;
			if (typeof candy._stripedOrientation !== "undefined") {
				isHorizontal = candy._stripedOrientation === "horizontal";
			} else {
				// Fallback: random (legacy, but should not happen with new match logic)
				isHorizontal = Math.random() < 0.5;
			}
			if (isHorizontal) {
				// Clear row
				for (var c = 0; c < BOARD_COLS; ++c) {
					var target = board[candy.row][c];
					if (toRemove.indexOf(target) === -1) toRemove.push(target);
				}
			} else {
				// Clear column
				for (var r = 0; r < BOARD_ROWS; ++r) {
					var target = board[r][candy.col];
					if (toRemove.indexOf(target) === -1) toRemove.push(target);
				}
			}
		} else if (candy.special === SPECIAL_RAINBOW) {
			// Clear all candies of a random type on board
			var colorType = getRandomCandyType();
			for (var r = 0; r < BOARD_ROWS; ++r) {
				for (var c = 0; c < BOARD_COLS; ++c) {
					var target = board[r][c];
					if (target.type === colorType && toRemove.indexOf(target) === -1) toRemove.push(target);
				}
			}
		} else if (candy.special === SPECIAL_BOMB) {
			// If this bomb was created by a 2x2 square match, do a shine and destroy 8 neighbors
			if (candy._pendingSquareBomb) {
				// Shine effect: flash the bomb candy
				LK.effects.flashObject(candy, 0xffff00, 400);
				// Destroy 8 neighbors (not self)
				for (var dr = -1; dr <= 1; ++dr) {
					for (var dc = -1; dc <= 1; ++dc) {
						var rr = candy.row + dr,
							cc = candy.col + dc;
						if (rr >= 0 && rr < BOARD_ROWS && cc >= 0 && cc < BOARD_COLS) {
							if (rr === candy.row && cc === candy.col) continue; // skip self
							var target = board[rr][cc];
							if (toRemove.indexOf(target) === -1) toRemove.push(target);
						}
					}
				}
				// Remove the flag so it doesn't trigger again
				delete candy._pendingSquareBomb;
			} else {
				// Default bomb: Clear 3x3 area (including self)
				for (var dr = -1; dr <= 1; ++dr) {
					for (var dc = -1; dc <= 1; ++dc) {
						var rr = candy.row + dr,
							cc = candy.col + dc;
						if (rr >= 0 && rr < BOARD_ROWS && cc >= 0 && cc < BOARD_COLS) {
							var target = board[rr][cc];
							if (toRemove.indexOf(target) === -1) toRemove.push(target);
						}
					}
				}
			}
		} else {
			if (toRemove.indexOf(candy) === -1) toRemove.push(candy);
		}
	}
	// Remove blockers if matched
	for (var i = 0; i < toRemove.length; ++i) {
		var candy = toRemove[i];
		if (candy.blocker === BLOCKER_CHOCOLATE) {
			// Remove chocolate in one match
			candy.blocker = BLOCKER_NONE;
			candy.setType(candy.type, candy.special, BLOCKER_NONE);
			continue;
		}
		if (candy.blocker === BLOCKER_ICE) {
			// Remove ice in two matches: first match cracks, second removes
			if (!candy._iceCracked) {
				candy._iceCracked = true;
				// Tint or visually indicate cracked ice (optional)
				candy.setType(candy.type, candy.special, BLOCKER_ICE);
				continue;
			} else {
				candy.blocker = BLOCKER_NONE;
				candy.setType(candy.type, candy.special, BLOCKER_NONE);
				continue;
			}
		}
		candy.isMatched = true;
		// Animate scale down and fade
		tween(candy, {
			scaleX: 0,
			scaleY: 0,
			alpha: 0
		}, {
			duration: 200,
			easing: tween.easeIn,
			onFinish: function (candy) {
				return function () {
					if (candy.asset) {
						candy.removeChild(candy.asset);
						candy.asset.destroy();
						candy.asset = null;
					}
					candy.visible = false;
					done++;
					if (done === toRemove.length && cb) cb();
				};
			}(candy)
		});
		// Add score
		score += 100;
	}
}
// Drop candies to fill empty spaces
function dropCandies(cb) {
	var moved = false;
	for (var col = 0; col < BOARD_COLS; ++col) {
		for (var row = BOARD_ROWS - 1; row >= 0; --row) {
			var candy = board[row][col];
			if (!candy.isMatched && candy.visible) continue;
			// Find nearest above
			for (var above = row - 1; above >= 0; --above) {
				var aboveCandy = board[above][col];
				if (!aboveCandy.isMatched && aboveCandy.visible) {
					// Move aboveCandy down
					board[row][col] = aboveCandy;
					aboveCandy.row = row;
					aboveCandy.col = col;
					aboveCandy.moveTo(col * CELL_SIZE + CELL_SIZE / 2, row * CELL_SIZE + CELL_SIZE / 2, 180);
					board[above][col] = candy;
					moved = true;
					break;
				}
			}
		}
	}
	if (cb) LK.setTimeout(cb, moved ? 200 : 0);
}
// Fill empty spaces with new candies
function refillBoard(cb) {
	var created = false;
	for (var col = 0; col < BOARD_COLS; ++col) {
		for (var row = 0; row < BOARD_ROWS; ++row) {
			var candy = board[row][col];
			if (!candy.isMatched && candy.visible) continue;
			// Create new candy
			var newCandy = new Candy();
			newCandy.row = row;
			newCandy.col = col;
			newCandy.x = col * CELL_SIZE + CELL_SIZE / 2;
			newCandy.y = -CELL_SIZE + CELL_SIZE / 2;
			boardContainer.addChild(newCandy);
			candies.push(newCandy);
			board[row][col] = newCandy;
			newCandy.moveTo(col * CELL_SIZE + CELL_SIZE / 2, row * CELL_SIZE + CELL_SIZE / 2, 220);
			created = true;
		}
	}
	if (cb) LK.setTimeout(cb, created ? 220 : 0);
}
// Remove matched candies from board
function clearMatchedCandies() {
	for (var row = 0; row < BOARD_ROWS; ++row) {
		for (var col = 0; col < BOARD_COLS; ++col) {
			var candy = board[row][col];
			if (candy.isMatched) {
				candy.destroyCandy();
				// Remove from candies array
				for (var i = 0; i < candies.length; ++i) {
					if (candies[i] === candy) {
						candies.splice(i, 1);
						break;
					}
				}
				// Replace with dummy invisible candy for drop logic
				var dummy = new Candy();
				dummy.row = row;
				dummy.col = col;
				dummy.visible = false;
				board[row][col] = dummy;
			}
		}
	}
}
// Deselect all candies
function deselectAll() {
	for (var i = 0; i < candies.length; ++i) {
		candies[i].setSelected(false);
	}
	selectedCandy = null;
}
// Handle user tap
function handleTap(x, y, obj) {
	if (swapping || animating || isProcessing) return;
	// Convert to board coordinates, ensuring correct offset and boundaries
	// Remove any offset miscalculations: boardContainer.x/y is already set, so local is relative to grid origin
	// For touch/click, always use the event's x/y relative to the game, then subtract boardContainer.x/y to get local grid coordinates
	var localX = x - boardContainer.x;
	var localY = y - boardContainer.y;
	// Clamp localX/localY to be within the grid area
	if (localX < 0 || localY < 0) return;
	var col = Math.floor(localX / CELL_SIZE);
	var row = Math.floor(localY / CELL_SIZE);
	// Clamp to grid bounds
	// Boundary check
	if (col < 0 || col >= BOARD_COLS || row < 0 || row >= BOARD_ROWS) return;
	var candy = board[row][col];
	// Debug: Draw a highlight rectangle over the selected cell
	if (typeof handleTap._debugRect !== "undefined" && handleTap._debugRect) {
		boardContainer.removeChild(handleTap._debugRect);
		handleTap._debugRect.destroy();
		handleTap._debugRect = null;
	}
	var debugRect = LK.getAsset('blocker_ice', {
		anchorX: 0,
		anchorY: 0,
		x: col * CELL_SIZE,
		y: row * CELL_SIZE,
		width: CELL_SIZE,
		height: CELL_SIZE,
		alpha: 0.25
	});
	// Insert debugRect at the bottom of boardContainer's children so it doesn't block candy input
	if (boardContainer.children && boardContainer.children.length > 0) {
		boardContainer.addChildAt(debugRect, 0);
	} else {
		boardContainer.addChild(debugRect);
	}
	handleTap._debugRect = debugRect;
	if (!candy || candy.blocker !== BLOCKER_NONE) return;
	// If nothing selected, select this candy
	if (!selectedCandy) {
		deselectAll();
		selectedCandy = candy;
		candy.setSelected(true);
		return;
	}
	// If clicking the same candy, deselect
	if (selectedCandy === candy) {
		deselectAll();
		return;
	}
	// If adjacent, try to swap
	if (areAdjacent(selectedCandy, candy)) {
		swapping = true;
		selectedCandy.setSelected(false);
		candy.setSelected(false);
		// Lock input during animation
		var c1 = selectedCandy;
		var c2 = candy;
		deselectAll();
		swapCandies(c1, c2, function () {
			// Special candy swap logic
			var specialActivated = false;
			// Rainbow (color bomb) swap
			if (c1.special === SPECIAL_RAINBOW || c2.special === SPECIAL_RAINBOW) {
				var colorType = c1.special === SPECIAL_RAINBOW ? c2.type : c1.type;
				var toRemove = [];
				for (var r = 0; r < BOARD_ROWS; ++r) {
					for (var c = 0; c < BOARD_COLS; ++c) {
						var target = board[r][c];
						if (target.type === colorType) toRemove.push(target);
					}
				}
				removeMatches(toRemove, function () {
					clearMatchedCandies();
					dropCandies(function () {
						refillBoard(function () {
							processMatches();
						});
					});
				});
				movesLeft--;
				updateGUI();
				// Animate the level description section to slide up from bottom, pause, then disappear at game start
				if (window.levelDescTxt && window.levelDescBg) {
					// Start off-screen (y = 200, below visible area)
					window.levelDescTxt.y = 200;
					window.levelDescBg.y = 200;
					// Make sure both are visible
					window.levelDescTxt.visible = true;
					window.levelDescBg.visible = true;
					// Slide up to visible position (-220) over 700ms
					tween(window.levelDescTxt, {
						y: -220
					}, {
						duration: 700,
						easing: tween.cubicOut
					});
					tween(window.levelDescBg, {
						y: -220
					}, {
						duration: 700,
						easing: tween.cubicOut,
						onFinish: function onFinish() {
							// Pause for 2.2s, then slide out and hide
							LK.setTimeout(function () {
								tween(window.levelDescTxt, {
									y: -600,
									alpha: 0
								}, {
									duration: 500,
									easing: tween.cubicIn,
									onFinish: function onFinish() {
										window.levelDescTxt.visible = false;
										window.levelDescTxt.alpha = 1;
										window.levelDescTxt.y = -220;
									}
								});
								tween(window.levelDescBg, {
									y: -600,
									alpha: 0
								}, {
									duration: 500,
									easing: tween.cubicIn,
									onFinish: function onFinish() {
										window.levelDescBg.visible = false;
										window.levelDescBg.alpha = 0.18;
										window.levelDescBg.y = -220;
									}
								});
							}, 2200);
						}
					});
				}
				swapping = false;
				specialActivated = true;
			}
			// Striped + striped: clear row and col
			else if (c1.special === SPECIAL_STRIPED && c2.special === SPECIAL_STRIPED) {
				var toRemove = [];
				for (var c = 0; c < BOARD_COLS; ++c) {
					var t1 = board[c1.row][c];
					if (toRemove.indexOf(t1) === -1) toRemove.push(t1);
				}
				for (var r = 0; r < BOARD_ROWS; ++r) {
					var t2 = board[r][c2.col];
					if (toRemove.indexOf(t2) === -1) toRemove.push(t2);
				}
				removeMatches(toRemove, function () {
					clearMatchedCandies();
					dropCandies(function () {
						refillBoard(function () {
							processMatches();
						});
					});
				});
				movesLeft--;
				updateGUI();
				swapping = false;
				specialActivated = true;
			}
			// Bomb + any: clear 3x3 around both
			else if (c1.special === SPECIAL_BOMB || c2.special === SPECIAL_BOMB) {
				var toRemove = [];
				var bombCandies = [c1, c2];
				for (var b = 0; b < 2; ++b) {
					if (bombCandies[b].special === SPECIAL_BOMB) {
						for (var dr = -1; dr <= 1; ++dr) {
							for (var dc = -1; dc <= 1; ++dc) {
								var rr = bombCandies[b].row + dr,
									cc = bombCandies[b].col + dc;
								if (rr >= 0 && rr < BOARD_ROWS && cc >= 0 && cc < BOARD_COLS) {
									var target = board[rr][cc];
									if (toRemove.indexOf(target) === -1) toRemove.push(target);
								}
							}
						}
					}
				}
				removeMatches(toRemove, function () {
					clearMatchedCandies();
					dropCandies(function () {
						refillBoard(function () {
							processMatches();
						});
					});
				});
				movesLeft--;
				updateGUI();
				swapping = false;
				specialActivated = true;
			}
			if (!specialActivated) {
				// After swap, check for matches
				var matches = findMatches();
				if (matches.length > 0) {
					processMatches();
					movesLeft--;
					updateGUI();
					swapping = false;
				} else {
					// No match, swap back
					LK.getSound('fail').play();
					// Animate a quick shake for both candies
					var origX1 = c1.col * CELL_SIZE + CELL_SIZE / 2;
					var origY1 = c1.row * CELL_SIZE + CELL_SIZE / 2;
					var origX2 = c2.col * CELL_SIZE + CELL_SIZE / 2;
					var origY2 = c2.row * CELL_SIZE + CELL_SIZE / 2;
					tween(c1, {
						x: origX1 + 20
					}, {
						duration: 60,
						onFinish: function onFinish() {
							tween(c1, {
								x: origX1
							}, {
								duration: 60
							});
						}
					});
					tween(c2, {
						x: origX2 - 20
					}, {
						duration: 60,
						onFinish: function onFinish() {
							tween(c2, {
								x: origX2
							}, {
								duration: 60
							});
						}
					});
					// Actually swap back the candies to their original positions in the board and update their row/col
					swapCandies(c1, c2, function () {
						swapping = false;
						deselectAll();
						// Re-select the original candy for user feedback
						selectedCandy = c1;
						c1.setSelected(true);
					});
					movesLeft--;
					updateGUI();
				}
			}
		});
		return;
	}
	// Not adjacent, select new candy
	deselectAll();
	selectedCandy = candy;
	candy.setSelected(true);
}
// Process matches and refill
function processMatches() {
	isProcessing = true;
	var matches = findMatches();
	if (matches.length === 0) {
		swapping = false;
		isProcessing = false;
		deselectAll();
		// Save progress after move
		storage.currentLevel = currentLevel;
		storage.score = score;
		storage.movesLeft = movesLeft;
		checkGameEnd();
		return;
	}
	removeMatches(matches, function () {
		clearMatchedCandies();
		dropCandies(function () {
			refillBoard(function () {
				// Chocolate spread: after all moves, if any chocolate exists, spread to adjacent
				var chocolateList = [];
				for (var row = 0; row < BOARD_ROWS; ++row) {
					for (var col = 0; col < BOARD_COLS; ++col) {
						var c = board[row][col];
						if (c.blocker === BLOCKER_CHOCOLATE) chocolateList.push(c);
					}
				}
				if (chocolateList.length > 0) {
					// Try to spread chocolate to adjacent non-blocker, non-special, non-chocolate
					for (var i = 0; i < chocolateList.length; ++i) {
						var c = chocolateList[i];
						var dirs = [[0, 1], [1, 0], [0, -1], [-1, 0]];
						for (var d = 0; d < dirs.length; ++d) {
							var rr = c.row + dirs[d][0],
								cc = c.col + dirs[d][1];
							if (rr >= 0 && rr < BOARD_ROWS && cc >= 0 && cc < BOARD_COLS) {
								var target = board[rr][cc];
								if (target.blocker === BLOCKER_NONE && target.special === SPECIAL_NONE) {
									target.blocker = BLOCKER_CHOCOLATE;
									target.setType(target.type, target.special, BLOCKER_CHOCOLATE);
									break;
								}
							}
						}
					}
				}
				// After all refills, check for new matches
				var newMatches = findMatches();
				if (newMatches.length > 0) {
					processMatches();
				} else {
					swapping = false;
					isProcessing = false;
					deselectAll();
					// Save progress after move
					storage.currentLevel = currentLevel;
					storage.score = score;
					storage.movesLeft = movesLeft;
					checkGameEnd();
				}
			});
		});
	});
}
// Update GUI
function updateGUI() {
	scoreTxt.setText('Score: ' + score);
	movesTxt.setText('Moves: ' + movesLeft);
	targetTxt.setText('Target: ' + targetScore);
	// Show "Boss" for every 5th level (level 5, 10, 15, ...)
	var levelNum = currentLevel + 1;
	if (levelNum % 5 === 0) {
		levelTxt.setText('Level: ' + levelNum + ' (Boss!)');
	} else {
		levelTxt.setText('Level: ' + levelNum);
	}
	// Show level description at the bottom center, styled for clarity and visibility on large screens
	if (!window.levelDescTxt) {
		// Reduce font size for phone screens, and background height
		window.levelDescTxt = new Text2('', {
			size: 54,
			// was 90, now fits on phone
			fill: "#fff",
			font: "Impact, 'Arial Black', Tahoma"
		});
		window.levelDescTxt.anchor.set(0.5, 1);
		LK.gui.bottom.addChild(window.levelDescTxt);
		window.levelDescTxt.y = -120; // less offset, fits above bottom buttons
		// Add a subtle background for readability, smaller height for phone
		window.levelDescBg = LK.getAsset('blocker_ice', {
			anchorX: 0.5,
			anchorY: 1,
			x: 0,
			y: -120,
			width: 900,
			// default, will be resized below
			height: 90,
			// was 160, now fits phone
			alpha: 0.18
		});
		// Insert background behind text
		LK.gui.bottom.addChildAt(window.levelDescBg, Math.max(0, LK.gui.bottom.children.indexOf(window.levelDescTxt)));
	}
	// Split the description into 3 lines (if possible), or pad with empty lines
	var desc = levels[currentLevel].description || '';
	var descLines = desc.split('\n');
	if (descLines.length < 3) {
		// Try to split by ". " or ": " or "! " or "."
		if (descLines.length === 1) {
			var autoSplit = descLines[0].replace(/([.!?])\s+/g, "$1\n").replace(/: /g, ":\n").split('\n');
			descLines = autoSplit;
		}
	}
	while (descLines.length < 3) descLines.push('');
	descLines = descLines.slice(0, 3);
	window.levelDescTxt.setText(descLines.join('\n'));
	// Keep background width in sync with text width (defensive: min 400, max 1200 for phone)
	if (window.levelDescBg && window.levelDescTxt) {
		var txtW = window.levelDescTxt.width + 60;
		if (txtW < 400) txtW = 400;
		if (txtW > 1200) txtW = 1200;
		window.levelDescBg.width = txtW;
		window.levelDescBg.x = 0;
	}
}
// Check for win/lose
function checkGameEnd() {
	if (score >= targetScore) {
		// Next level if available, else show win
		if (currentLevel < levels.length - 1) {
			// Flash the episode score
			LK.effects.flashScreen(0xffff00, 800);
			// Show a big score text in the center
			if (!window.episodeScoreTxt) {
				window.episodeScoreTxt = new Text2('', {
					size: 180,
					fill: "#fff"
				});
				window.episodeScoreTxt.anchor.set(0.5, 0.5);
				LK.gui.center.addChild(window.episodeScoreTxt);
			}
			window.episodeScoreTxt.setText('Score: ' + score);
			window.episodeScoreTxt.visible = true;
			// Hide any previous next level frame and score text to prevent overlap
			if (window.episodeScoreTxt) window.episodeScoreTxt.visible = false;
			if (window.nextLevelBtnBig) window.nextLevelBtnBig.visible = false;
			// Show next level button in the center below the score, as a button with asset background and text label
			if (!window.nextLevelBtnBig) {
				// Create a container for the button
				window.nextLevelBtnBig = new Container();
				// Add a button background asset (replace 'prism_button' with your asset id)
				var btnBg = LK.getAsset('prism_button', {
					anchorX: 0.5,
					anchorY: 0.5,
					x: 0,
					y: 0,
					width: 500,
					height: 160
				});
				window.nextLevelBtnBig.addChild(btnBg);
				// Add the text label on top
				var btnLabel = new Text2('Next Level', {
					size: 120,
					fill: 0xFFFFFF,
					font: "Impact, 'Arial Black', Tahoma"
				});
				btnLabel.anchor.set(0.5, 0.5);
				btnLabel.x = 0;
				btnLabel.y = 0;
				window.nextLevelBtnBig.addChild(btnLabel);
				window.nextLevelBtnBig.anchorX = 0.5;
				window.nextLevelBtnBig.anchorY = 0.5;
				window.nextLevelBtnBig.x = 0;
				window.nextLevelBtnBig.y = 200;
				LK.gui.center.addChild(window.nextLevelBtnBig);
				window.nextLevelBtnBig.interactive = true;
				window.nextLevelBtnBig.buttonMode = true;
				window.nextLevelBtnBig.down = function (x, y, obj) {
					if (window.episodeScoreTxt) window.episodeScoreTxt.visible = false;
					if (window.nextLevelBtnBig) window.nextLevelBtnBig.visible = false;
					currentLevel++;
					score = 0;
					movesLeft = levels[currentLevel].moves;
					targetScore = levels[currentLevel].target;
					// Save progress
					storage.currentLevel = currentLevel;
					storage.score = score;
					storage.movesLeft = movesLeft;
					updateGUI();
					initBoard();
				};
			}
			window.nextLevelBtnBig.visible = true;
			if (window.episodeScoreTxt) window.episodeScoreTxt.visible = true;
			// Hide after 2 seconds if user doesn't tap
			LK.setTimeout(function () {
				if (window.episodeScoreTxt) window.episodeScoreTxt.visible = false;
				if (window.nextLevelBtnBig) window.nextLevelBtnBig.visible = false;
				if (window.nextLevelBtnBig && window.nextLevelBtnBig.visible) {
					// If still visible, auto-advance
					window.nextLevelBtnBig.down();
				}
			}, 4000);
		} else {
			LK.showYouWin();
		}
	} else if (movesLeft <= 0) {
		LK.showGameOver();
	}
}
// Game event handlers
game.down = function (x, y, obj) {
	// Don't allow tap in top left 100x100
	if (x < 100 && y < 100) return;
	handleTap(x, y, obj);
};
// Drag-to-swap logic
var dragStartCandy = null;
var dragCurrentCandy = null;
var dragActive = false;
// Helper: get candy at pixel position (returns null if not valid)
function getCandyAtPixel(x, y) {
	var localX = x - boardContainer.x;
	var localY = y - boardContainer.y;
	if (localX < 0 || localY < 0) return null;
	var col = Math.floor(localX / CELL_SIZE);
	var row = Math.floor(localY / CELL_SIZE);
	if (col < 0 || col >= BOARD_COLS || row < 0 || row >= BOARD_ROWS) return null;
	return board[row][col];
}
// Override game.down for drag start
game.down = function (x, y, obj) {
	// Don't allow tap in top left 100x100
	if (x < 100 && y < 100) return;
	if (swapping || animating || isProcessing) return;
	var candy = getCandyAtPixel(x, y);
	if (!candy || candy.blocker !== BLOCKER_NONE) return;
	dragStartCandy = candy;
	dragCurrentCandy = candy;
	dragActive = true;
	deselectAll();
	candy.setSelected(true);
	selectedCandy = candy;
};
// Drag move handler
game.move = function (x, y, obj) {
	if (!dragActive || swapping || animating || isProcessing) return;
	var candy = getCandyAtPixel(x, y);
	if (!candy || candy.blocker !== BLOCKER_NONE) return;
	if (candy === dragStartCandy) return;
	// Only allow swap with adjacent
	if (areAdjacent(dragStartCandy, candy)) {
		// Lock drag
		dragActive = false;
		dragStartCandy.setSelected(false);
		candy.setSelected(false);
		var c1 = dragStartCandy;
		var c2 = candy;
		deselectAll();
		swapCandies(c1, c2, function () {
			// Special candy swap logic (same as tap)
			var specialActivated = false;
			if (c1.special === SPECIAL_RAINBOW || c2.special === SPECIAL_RAINBOW) {
				var colorType = c1.special === SPECIAL_RAINBOW ? c2.type : c1.type;
				var toRemove = [];
				for (var r = 0; r < BOARD_ROWS; ++r) {
					for (var c = 0; c < BOARD_COLS; ++c) {
						var target = board[r][c];
						if (target.type === colorType) toRemove.push(target);
					}
				}
				removeMatches(toRemove, function () {
					clearMatchedCandies();
					dropCandies(function () {
						refillBoard(function () {
							processMatches();
						});
					});
				});
				movesLeft--;
				updateGUI();
				swapping = false;
				specialActivated = true;
			} else if (c1.special === SPECIAL_STRIPED && c2.special === SPECIAL_STRIPED) {
				var toRemove = [];
				for (var c = 0; c < BOARD_COLS; ++c) {
					var t1 = board[c1.row][c];
					if (toRemove.indexOf(t1) === -1) toRemove.push(t1);
				}
				for (var r = 0; r < BOARD_ROWS; ++r) {
					var t2 = board[r][c2.col];
					if (toRemove.indexOf(t2) === -1) toRemove.push(t2);
				}
				removeMatches(toRemove, function () {
					clearMatchedCandies();
					dropCandies(function () {
						refillBoard(function () {
							processMatches();
						});
					});
				});
				movesLeft--;
				updateGUI();
				swapping = false;
				specialActivated = true;
			} else if (c1.special === SPECIAL_BOMB || c2.special === SPECIAL_BOMB) {
				var toRemove = [];
				var bombCandies = [c1, c2];
				for (var b = 0; b < 2; ++b) {
					if (bombCandies[b].special === SPECIAL_BOMB) {
						for (var dr = -1; dr <= 1; ++dr) {
							for (var dc = -1; dc <= 1; ++dc) {
								var rr = bombCandies[b].row + dr,
									cc = bombCandies[b].col + dc;
								if (rr >= 0 && rr < BOARD_ROWS && cc >= 0 && cc < BOARD_COLS) {
									var target = board[rr][cc];
									if (toRemove.indexOf(target) === -1) toRemove.push(target);
								}
							}
						}
					}
				}
				removeMatches(toRemove, function () {
					clearMatchedCandies();
					dropCandies(function () {
						refillBoard(function () {
							processMatches();
						});
					});
				});
				movesLeft--;
				updateGUI();
				swapping = false;
				specialActivated = true;
			}
			if (!specialActivated) {
				var matches = findMatches();
				if (matches.length > 0) {
					processMatches();
					movesLeft--;
					updateGUI();
					swapping = false;
				} else {
					// No match, swap back
					LK.getSound('fail').play();
					var origX1 = c1.col * CELL_SIZE + CELL_SIZE / 2;
					var origY1 = c1.row * CELL_SIZE + CELL_SIZE / 2;
					var origX2 = c2.col * CELL_SIZE + CELL_SIZE / 2;
					var origY2 = c2.row * CELL_SIZE + CELL_SIZE / 2;
					tween(c1, {
						x: origX1 + 20
					}, {
						duration: 60,
						onFinish: function onFinish() {
							tween(c1, {
								x: origX1
							}, {
								duration: 60
							});
						}
					});
					tween(c2, {
						x: origX2 - 20
					}, {
						duration: 60,
						onFinish: function onFinish() {
							tween(c2, {
								x: origX2
							}, {
								duration: 60
							});
						}
					});
					// Actually swap back the candies to their original positions in the board and update their row/col
					swapCandies(c1, c2, function () {
						swapping = false;
						deselectAll();
						// Re-select the original candy for user feedback
						selectedCandy = c1;
						c1.setSelected(true);
					});
					movesLeft--;
					updateGUI();
				}
			}
		});
	}
};
// Drag end handler
game.up = function (x, y, obj) {
	dragActive = false;
	dragStartCandy = null;
	dragCurrentCandy = null;
	// Deselect all if not swapping
	if (!swapping && !animating && !isProcessing) {
		deselectAll();
	}
};
// Game update
game.update = function () {
	// No per-frame logic needed for MVP
};
// Start music
LK.playMusic('bgmusic', {
	fade: {
		start: 0,
		end: 0.7,
		duration: 1000
	}
});
// Level label at bottom left
var levelTxt = new Text2('Level: 1', {
	size: 70,
	fill: "#fff"
});
levelTxt.anchor.set(0, 1);
LK.gui.bottomLeft.addChild(levelTxt);
levelTxt.x = 0;
levelTxt.y = 0;
// Add previous level button at the bottom left (but not in the top left 100x100 area)
var prevLevelBtn = new Text2('Prev', {
	size: 90,
	fill: "#fff"
});
prevLevelBtn.anchor.set(0, 1);
LK.gui.bottomLeft.addChild(prevLevelBtn);
prevLevelBtn.x = 120; // avoid top left menu area
prevLevelBtn.y = 0;
prevLevelBtn.interactive = true;
prevLevelBtn.buttonMode = true;
prevLevelBtn.down = function (x, y, obj) {
	if (currentLevel > 0) {
		currentLevel--;
		score = 0;
		movesLeft = levels[currentLevel].moves;
		targetScore = levels[currentLevel].target;
		// Save progress
		storage.currentLevel = currentLevel;
		storage.score = score;
		storage.movesLeft = movesLeft;
		updateGUI();
		initBoard();
	}
};
// Add reset button at the bottom center
var resetBtn = new Text2('Reset', {
	size: 90,
	fill: "#fff"
});
resetBtn.anchor.set(0.5, 1);
LK.gui.bottom.addChild(resetBtn);
resetBtn.y = 0; // flush to bottom
resetBtn.interactive = true;
resetBtn.buttonMode = true;
resetBtn.down = function (x, y, obj) {
	// Reset current level: reset score, moves, board
	score = 0;
	movesLeft = levels[currentLevel].moves;
	targetScore = levels[currentLevel].target;
	// Save progress
	storage.currentLevel = currentLevel;
	storage.score = score;
	storage.movesLeft = movesLeft;
	updateGUI();
	initBoard();
};
// Add next level button at the bottom right
var nextLevelBtn = new Text2('Next', {
	size: 90,
	fill: "#fff"
});
nextLevelBtn.anchor.set(1, 1);
LK.gui.bottomRight.addChild(nextLevelBtn);
nextLevelBtn.x = 0;
nextLevelBtn.y = 0;
nextLevelBtn.interactive = true;
nextLevelBtn.buttonMode = true;
nextLevelBtn.down = function (x, y, obj) {
	if (currentLevel < levels.length - 1) {
		currentLevel++;
		score = 0;
		movesLeft = levels[currentLevel].moves;
		targetScore = levels[currentLevel].target;
		// Save progress
		storage.currentLevel = currentLevel;
		storage.score = score;
		storage.movesLeft = movesLeft;
		updateGUI();
		initBoard();
	}
};
// Start game
initBoard();
updateGUI();

===================================================================
--- original.js
+++ change.js
@@ -110,9 +110,9 @@
 var BLOCKER_ICE = 2;
 // Board size (BIGGER, fits screen better)
 var BOARD_COLS = 7;
 var BOARD_ROWS = 9;
-var CELL_SIZE = 260; // was 200, now 260 for bigger candies and board
+var CELL_SIZE = 250; // match asset size so candies are adjacent
 var BOARD_OFFSET_X = Math.floor((2048 - BOARD_COLS * CELL_SIZE) / 2);
 var BOARD_OFFSET_Y = 120; // move up, fits on tall screens
 // Helper: get random candy type
 function getRandomCandyType() {