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

/**** 
* Classes
****/ 
// BattleScreen: Handles the turn-based combat
var BattleScreen = Container.expand(function () {
	var self = Container.call(this);
	self.visible = false; // Initially hidden
	self.alpha = 0; // Set alpha to 0 for fade-in animation
	// Background overlay
	self.overlay = self.attachAsset('emptyTileCover', {
		width: 2048,
		height: 2732,
		alpha: 0.8
	});
	// Monster display
	self.monsterDisplay = self.attachAsset('monsterTileMonster', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 - 300,
		// Position near top-right corner within the battle area
		y: 2732 * 0.2 + 200,
		// Position near top-right corner within the battle area
		scaleX: 2,
		scaleY: 2
	});
	// Monster stats text
	self.monsterStatText = new Text2('', {
		size: 60,
		fill: "#fff"
	});
	self.monsterStatText.anchor.set(0.5, 0); // Anchor to top-center
	self.monsterStatText.x = self.monsterDisplay.x;
	self.monsterStatText.y = self.monsterDisplay.y + self.monsterDisplay.height / 2 + 60; // Move further below monster image
	self.addChild(self.monsterStatText);
	// Player stats text (in battle)
	self.playerBattleStatText = new Text2('', {
		size: 60,
		fill: "#fff"
	});
	self.playerDisplay = self.attachAsset('character', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 300,
		// Position near bottom-left corner within the battle area
		y: 2732 * 0.8 - 200,
		// Position near bottom-left corner within the battle area
		scaleX: 2,
		scaleY: 2
	});
	self.playerBattleStatText.anchor.set(0.5, 0); // Anchor to top-center
	// Set stat text position to where hero will appear
	self.playerBattleStatText.x = 300;
	self.playerBattleStatText.y = 2732 * 0.8 - 200 + 100 + 60; // 100 is half hero height at scale 2
	self.addChild(self.playerBattleStatText);
	// Action button (Attack)
	self.attackBtn = new Text2('ATTACK', {
		size: 80,
		fill: "#fff",
		font: "Impact"
	});
	self.attackBtn.anchor.set(0.5, 0.5);
	self.attackBtn.x = 2048 / 2;
	self.attackBtn.y = 2732 - 300; // Position near bottom
	self.addChild(self.attackBtn);
	self.attackBtn.down = function () {
		if (!self.visible) return;
		self.playerTurn();
	};
	self.currentMonster = null; // Reference to the monster tile being fought
	// Start battle
	self.startBattle = function (monsterTile) {
		self.currentMonster = monsterTile;
		self.visible = true;
		self.alpha = 0;
		game.addChild(self); // Add battle screen to game
		// Hide hero/monster and attack button for intro animation
		self.monsterDisplay.visible = false;
		self.playerDisplay.visible = false;
		self.monsterStatText.visible = false;
		self.playerBattleStatText.visible = false;
		self.attackBtn.visible = false;
		// Fade in battle screen
		tween(self, {
			alpha: 1
		}, {
			duration: 300,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				// Show "You encountered a monster!" message
				var encounterText = new Text2('You encountered a monster!', {
					size: 90,
					fill: 0xFFE066
				});
				encounterText.anchor.set(0.5, 0.5);
				encounterText.x = 2048 / 2;
				encounterText.y = 2732 / 2 - 200;
				self.addChild(encounterText);
				tween(encounterText, {
					alpha: 0
				}, {
					duration: 900,
					delay: 900,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						encounterText.destroy();
						// Prepare hero/monster offscreen for slide-in
						// Save original positions
						var heroTargetX = 300;
						var heroTargetY = 2732 * 0.8 - 200;
						var monsterTargetX = 2048 - 300;
						var monsterTargetY = 2732 * 0.2 + 200;
						self.playerDisplay.x = -self.playerDisplay.width; // Offscreen left
						self.playerDisplay.y = heroTargetY;
						self.monsterDisplay.x = 2048 + self.monsterDisplay.width; // Offscreen right
						self.monsterDisplay.y = monsterTargetY;
						self.playerDisplay.visible = true;
						self.monsterDisplay.visible = true;
						self.monsterStatText.visible = false;
						self.playerBattleStatText.visible = false;
						// Slide in hero and monster simultaneously
						var slideInCount = 0;
						function afterSlideIn() {
							slideInCount++;
							if (slideInCount === 2) {
								// Show stats and decide who attacks first
								self.monsterStatText.visible = true;
								self.playerBattleStatText.visible = true;
								self.updateBattleStats();
								// Randomize who attacks first: 0 = player, 1 = monster
								var firstAttacker = Math.random() < 0.5 ? "player" : "monster";
								var firstText = firstAttacker === "monster" ? "Monster strikes first!" : "You start!";
								var firstTextColor = firstAttacker === "monster" ? 0xff0000 : 0xFFE066;
								var whoFirstText = new Text2(firstText, {
									size: 90,
									fill: firstTextColor
								});
								whoFirstText.anchor.set(0.5, 0.5);
								whoFirstText.x = 2048 / 2;
								whoFirstText.y = 2732 / 2;
								self.addChild(whoFirstText);
								tween(whoFirstText, {
									alpha: 0
								}, {
									duration: 900,
									delay: 900,
									easing: tween.easeOut,
									onFinish: function onFinish() {
										whoFirstText.destroy();
										// Show attack button and start the correct turn after a short delay
										self.attackBtn.visible = true;
										if (firstAttacker === "monster") {
											LK.setTimeout(self.monsterTurn, 500);
										}
										// If player starts, do nothing: player must press attackBtn
									}
								});
							}
						}
						tween(self.playerDisplay, {
							x: heroTargetX
						}, {
							duration: 600,
							easing: tween.cubicOut,
							onFinish: afterSlideIn
						});
						tween(self.monsterDisplay, {
							x: monsterTargetX
						}, {
							duration: 600,
							easing: tween.cubicOut,
							onFinish: afterSlideIn
						});
					}
				});
			}
		});
	};
	// End battle
	self.endBattle = function (win) {
		self.visible = false;
		self.alpha = 0; // Reset alpha
		self.attackBtn.visible = false;
		if (win) {
			self.currentMonster.defeat();
			monstersLeft--;
			player.gainExp(self.currentMonster.exp);
			updateGUI();
			if (monstersLeft <= 0) {
				LK.showYouWin();
				gameOver = true;
			}
		} else {
			// Player lost, game over is handled in handleTileDown
		}
		self.currentMonster = null;
		self.parent.removeChild(self); // Remove battle screen from game
	};
	// Update battle stats display
	self.updateBattleStats = function () {
		if (self.currentMonster) {
			self.monsterStatText.setText('HP:' + self.currentMonster.hp + '/' + self.currentMonster.maxHp + '  DMG:' + self.currentMonster.damage);
			self.playerBattleStatText.setText('HP:' + player.hp + '/' + player.maxHp + '  DMG:' + player.damage);
		}
	};
	// Player's turn
	self.playerTurn = function () {
		if (!self.currentMonster) return;
		// Animate player attack: slide playerDisplay forward, then back, then apply damage
		var originalX = self.playerDisplay.x;
		var attackX = originalX + 220;
		self.attackBtn.visible = false; // Hide attack button during animation
		// Show "Player Attacks!" text
		var playerAttackText = new Text2('Player Attacks!', {
			size: 80,
			fill: 0xffe066
		});
		playerAttackText.anchor.set(0.5, 0.5);
		playerAttackText.x = 2048 / 2;
		playerAttackText.y = self.monsterStatText.y - 100;
		self.addChild(playerAttackText);
		function doAttack() {
			// Damage and flash
			self.currentMonster.hp -= player.damage;
			LK.effects.flashObject(self.monsterDisplay, 0xffe066, 300);
			// Show animated -X text above monster in battle
			if (self.currentMonster && self.monsterDisplay) {
				var monsterDmgText = new Text2('-' + player.damage, {
					size: 90,
					fill: 0xff0000
				});
				monsterDmgText.anchor.set(0.5, 1);
				// Position above monster sprite
				monsterDmgText.x = self.monsterDisplay.x;
				monsterDmgText.y = self.monsterDisplay.y - self.monsterDisplay.height / 2 - 20;
				self.addChild(monsterDmgText);
				// Animate: pop up and fade out
				tween(monsterDmgText, {
					y: monsterDmgText.y - 80,
					alpha: 0
				}, {
					duration: 700,
					easing: tween.cubicOut,
					onFinish: function onFinish() {
						monsterDmgText.destroy();
					}
				});
			}
			self.updateBattleStats();
			// Fade out attack text
			tween(playerAttackText, {
				alpha: 0
			}, {
				duration: 600,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					playerAttackText.destroy();
				}
			});
			// If monster dies, animate monster death
			if (self.currentMonster.hp <= 0) {
				// Monster death animation: fade out and scale down
				tween(self.monsterDisplay, {
					alpha: 0,
					scaleX: 0.1,
					scaleY: 0.1
				}, {
					duration: 600,
					easing: tween.cubicIn,
					onFinish: function onFinish() {
						// Show "Victory!" message before closing battle screen
						var victoryText = new Text2('Victory!', {
							size: 120,
							fill: 0xA3E635
						});
						victoryText.anchor.set(0.5, 0.5);
						victoryText.x = 2048 / 2;
						victoryText.y = 2732 / 2;
						self.addChild(victoryText);
						victoryText.alpha = 0;
						// Fade in, hold, then fade out
						tween(victoryText, {
							alpha: 1
						}, {
							duration: 300,
							easing: tween.easeOut,
							onFinish: function onFinish() {
								tween(victoryText, {
									alpha: 0
								}, {
									duration: 500,
									delay: 700,
									easing: tween.easeIn,
									onFinish: function onFinish() {
										victoryText.destroy();
										self.endBattle(true); // Player wins
										// Reset monsterDisplay for next battle
										self.monsterDisplay.alpha = 1;
										self.monsterDisplay.scaleX = 2;
										self.monsterDisplay.scaleY = 2;
									}
								});
							}
						});
					}
				});
			} else {
				// Monster survives, monster's turn after a delay
				LK.setTimeout(self.monsterTurn, 500);
				self.attackBtn.visible = true;
			}
		}
		// Animate player forward, then back, then do attack
		tween(self.playerDisplay, {
			x: attackX
		}, {
			duration: 180,
			easing: tween.cubicOut,
			onFinish: function onFinish() {
				tween(self.playerDisplay, {
					x: originalX
				}, {
					duration: 180,
					easing: tween.cubicIn,
					onFinish: doAttack
				});
			}
		});
	};
	// Monster's turn
	self.monsterTurn = function () {
		if (!self.currentMonster) return;
		// Animate monster attack: slide monsterDisplay forward, then back, then apply damage
		var originalX = self.monsterDisplay.x;
		var attackX = originalX - 220; // Slide left toward player
		self.attackBtn.visible = false; // Hide attack button during animation
		// Show "Monster Attacks!" text
		var monsterAttackText = new Text2('Monster Attacks!', {
			size: 80,
			fill: 0xff0000
		});
		monsterAttackText.anchor.set(0.5, 0.5);
		monsterAttackText.x = 2048 / 2;
		monsterAttackText.y = self.playerBattleStatText.y + 100;
		self.addChild(monsterAttackText);
		function doMonsterAttack() {
			player.takeDamage(self.currentMonster.damage);
			// Flash monster and player
			LK.effects.flashObject(self.monsterDisplay, 0xff0000, 300); // Flash monster indicating it attacked
			LK.effects.flashObject(self.playerDisplay, 0xff0000, 300); // Flash player sprite
			LK.effects.flashObject(self.playerBattleStatText, 0xff0000, 300); // Flash player stats indicating damage
			// Fade out attack text
			tween(monsterAttackText, {
				alpha: 0
			}, {
				duration: 600,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					monsterAttackText.destroy();
					// Show attack button again if player is still alive and battle is ongoing
					if (player.hp > 0 && self.currentMonster && !gameOver) {
						self.attackBtn.visible = true;
					}
				}
			});
			self.updateBattleStats();
			if (player.hp <= 0) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				gameOver = true;
				revealAllMonsters();
				self.endBattle(false); // Player loses
			}
		}
		// Animate monster forward, then back, then do attack
		tween(self.monsterDisplay, {
			x: attackX
		}, {
			duration: 180,
			easing: tween.cubicOut,
			onFinish: function onFinish() {
				tween(self.monsterDisplay, {
					x: originalX
				}, {
					duration: 180,
					easing: tween.cubicIn,
					onFinish: doMonsterAttack
				});
			}
		});
	};
	return self;
});
// ChestScreen: Handles the chest found popup
var ChestScreen = Container.expand(function () {
	var self = Container.call(this);
	self.visible = false;
	self.alpha = 0;
	// Background overlay
	self.overlay = self.attachAsset('emptyTileCover', {
		width: 2048,
		height: 2732,
		alpha: 0.8
	});
	// Chest display (center)
	self.chestDisplay = self.attachAsset('emptyTileBg', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2,
		y: 2732 / 2 - 100,
		scaleX: 2,
		scaleY: 2,
		color: 0xFFD700 // gold for dev
	});
	// "You found a chest!" text
	self.chestText = new Text2('You found a chest!', {
		size: 90,
		fill: 0xFFD700
	});
	self.chestText.anchor.set(0.5, 0.5);
	self.chestText.x = 2048 / 2;
	self.chestText.y = 2732 / 2 - 350;
	self.addChild(self.chestText);
	// Player display (bottom, like battle screen)
	self.playerDisplay = self.attachAsset('character', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2,
		y: 2732 * 0.8,
		scaleX: 2,
		scaleY: 2
	});
	// Start chest screen
	self.startChest = function (chestTile) {
		self.currentChest = chestTile;
		self.visible = true;
		self.alpha = 0;
		game.addChild(self);
		// Fade in
		tween(self, {
			alpha: 1
		}, {
			duration: 300,
			easing: tween.easeOut
		});
	};
	// End chest screen
	self.endChest = function () {
		self.visible = false;
		self.alpha = 0;
		self.currentChest = null;
		if (self.parent) self.parent.removeChild(self);
	};
	return self;
});
// ChestTile: Represents a chest hidden under a tile
var ChestTile = Container.expand(function () {
	var self = Container.call(this);
	self.revealed = false;
	self.opened = false;
	self.cover = self.attachAsset('emptyTileCover', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Use a chest image asset (use a box for now, engine will replace with chest art)
	self.chest = self.attachAsset('emptyTileBg', {
		anchorX: 0.5,
		anchorY: 0.5,
		color: 0xFFD700,
		// gold color for dev
		alpha: 0 // Hidden until revealed
	});
	// Reveal the chest
	self.reveal = function () {
		if (self.revealed) return;
		self.revealed = true;
		self.cover.alpha = 0.2;
		self.chest.alpha = 1;
	};
	// Mark as opened
	self.open = function () {
		self.opened = true;
		// Optionally animate chest opening here
	};
	return self;
});
// EmptyTile: Represents a safe tile (no monster)
var EmptyTile = Container.expand(function () {
	var self = Container.call(this);
	self.revealed = false;
	self.adjacentMonsters = 0;
	self.cover = self.attachAsset('emptyTileCover', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.bg = self.attachAsset('emptyTileBg', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0 // Hidden until revealed
	});
	self.adjText = new Text2('', {
		size: 48,
		fill: "#fff"
	});
	self.adjText.anchor.set(0.5, 0.5);
	self.adjText.alpha = 0;
	self.addChild(self.adjText);
	self.reveal = function () {
		if (self.revealed) return;
		self.revealed = true;
		self.cover.alpha = 0.2;
		self.bg.alpha = 1;
		if (self.adjacentMonsters > 0) {
			self.adjText.setText(self.adjacentMonsters + '');
			self.adjText.alpha = 1;
		}
	};
	return self;
});
// MonsterTile: Represents a monster hidden under a tile
var MonsterTile = Container.expand(function () {
	var self = Container.call(this);
	// Monster stats
	self.hp = 1;
	self.maxHp = 1;
	self.damage = 1;
	self.exp = 1;
	self.revealed = false;
	self.defeated = false;
	// Visuals
	self.cover = self.attachAsset('monsterTileCover', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.monster = self.attachAsset('monsterTileMonster', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0 // Hidden until revealed
	});
	// Show monster stats as text (hidden until revealed)
	self.statText = new Text2('', {
		size: 48,
		fill: "#fff"
	});
	self.statText.anchor.set(0.5, 0.5);
	self.statText.alpha = 0;
	self.addChild(self.statText);
	// Reveal the monster
	self.reveal = function () {
		if (self.revealed) return;
		self.revealed = true;
		self.cover.alpha = 0.2;
		self.monster.alpha = 1;
		self.statText.setText('');
		self.statText.alpha = 0;
	};
	// Mark as defeated
	self.defeat = function () {
		self.defeated = true;
		self.monster.alpha = 0.3;
		self.cover.alpha = 0.1;
		self.statText.setText('');
		self.statText.alpha = 0;
	};
	return self;
});
// Player: Holds player stats and methods
var Player = Container.expand(function () {
	var self = Container.call(this);
	self.maxHp = 10;
	self.hp = 10;
	self.damage = 1;
	self.exp = 0;
	self.level = 1;
	self.expToLevel = 5;
	// Level up: spend exp to increase stats or heal
	self.levelUp = function (choice) {
		if (self.exp < self.expToLevel) return false;
		self.exp -= self.expToLevel;
		self.level += 1;
		self.expToLevel = Math.floor(self.expToLevel * 1.5);
		if (choice === 'hp') {
			self.maxHp += 3;
			self.hp = self.maxHp;
		} else if (choice === 'damage') {
			self.damage += 1;
		} else if (choice === 'heal') {
			self.hp = self.maxHp;
		}
		return true;
	};
	// Take damage
	self.takeDamage = function (amount) {
		self.hp -= amount;
		if (self.hp < 0) self.hp = 0;
		// Show animated -X text above player in battle
		if (battleScreen && battleScreen.visible && battleScreen.playerDisplay) {
			var dmgText = new Text2('-' + amount, {
				size: 90,
				fill: 0xff0000
			});
			dmgText.anchor.set(0.5, 1);
			// Position above player sprite
			dmgText.x = battleScreen.playerDisplay.x;
			dmgText.y = battleScreen.playerDisplay.y - battleScreen.playerDisplay.height / 2 - 20;
			battleScreen.addChild(dmgText);
			// Animate: pop up and fade out
			tween(dmgText, {
				y: dmgText.y - 80,
				alpha: 0
			}, {
				duration: 700,
				easing: tween.cubicOut,
				onFinish: function onFinish() {
					dmgText.destroy();
				}
			});
		}
	};
	// Gain exp
	self.gainExp = function (amount) {
		self.exp += amount;
	};
	// Heal
	self.heal = function (amount) {
		self.hp += amount;
		if (self.hp > self.maxHp) self.hp = self.maxHp;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x22223a
});

/**** 
* Game Code
****/ 
// --- Game Constants ---
function _slicedToArray(r, e) {
	return _arrayWithHoles(r) || _iterableToArrayLimit(r, e) || _unsupportedIterableToArray(r, e) || _nonIterableRest();
}
function _nonIterableRest() {
	throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
function _unsupportedIterableToArray(r, a) {
	if (r) {
		if ("string" == typeof r) return _arrayLikeToArray(r, a);
		var t = {}.toString.call(r).slice(8, -1);
		return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0;
	}
}
function _arrayLikeToArray(r, a) {
	(null == a || a > r.length) && (a = r.length);
	for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e];
	return n;
}
function _iterableToArrayLimit(r, l) {
	var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
	if (null != t) {
		var e,
			n,
			i,
			u,
			a = [],
			f = !0,
			o = !1;
		try {
			if (i = (t = t.call(r)).next, 0 === l) {
				if (Object(t) !== t) return;
				f = !1;
			} else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0);
		} catch (r) {
			o = !0, n = r;
		} finally {
			try {
				if (!f && null != t["return"] && (u = t["return"](), Object(u) !== u)) return;
			} finally {
				if (o) throw n;
			}
		}
		return a;
	}
}
function _arrayWithHoles(r) {
	if (Array.isArray(r)) return r;
}
var GRID_COLS = 8;
var GRID_ROWS = 8;
var TILE_SIZE = 180;
var GRID_OFFSET_X = Math.floor((2048 - GRID_COLS * TILE_SIZE) / 2);
var GRID_OFFSET_Y = Math.floor(2732 * 0.2 + (2732 * 0.6 - GRID_ROWS * TILE_SIZE) / 2); // Center the grid vertically within the middle 60%
var MONSTER_COUNT = 12;
// --- Asset Initialization ---
// --- Game State ---
var player = new Player();
var grid = []; // 2D array [row][col]
var tileObjs = []; // Flat array of all tile objects for easy iteration
var monstersLeft = MONSTER_COUNT;
var revealedTiles = 0;
var totalSafeTiles = GRID_COLS * GRID_ROWS - MONSTER_COUNT;
var gameOver = false;
var battleScreen = new BattleScreen();
var chestScreen = new ChestScreen();
// --- GUI Elements ---
var hpText = new Text2('', {
	size: 40,
	fill: 0xFF6666
});
hpText.anchor.set(0.5, 1); // Anchor to bottom-center
LK.gui.bottom.addChild(hpText);
var dmgText = new Text2('', {
	size: 40,
	fill: "#fff"
});
dmgText.anchor.set(0.5, 1); // Anchor to bottom-center
LK.gui.bottom.addChild(dmgText);
var expText = new Text2('', {
	size: 40,
	fill: 0xFFE066
});
expText.anchor.set(0.5, 1); // Anchor to bottom-center
LK.gui.bottom.addChild(expText);
var levelText = new Text2('', {
	size: 40,
	fill: 0xA3E635
});
levelText.anchor.set(0, 0.5); // Anchor to left-middle
LK.gui.top.addChild(levelText);
var monstersLeftText = new Text2('', {
	size: 40,
	fill: "#fff"
});
monstersLeftText.anchor.set(0, 0.5); // Anchor to left-middle
LK.gui.top.addChild(monstersLeftText);
var levelUpBtn = new Text2('LEVEL UP', {
	size: 70,
	fill: "#fff",
	font: "Impact"
});
levelUpBtn.anchor.set(0.5, 0.5);
levelUpBtn.alpha = 0.7;
levelUpBtn.visible = false;
levelUpBtn.down = function () {
	if (!this.visible) return;
	showLevelUpChoices();
};
LK.gui.top.addChild(levelUpBtn);
var levelUpChoiceBtns = [];
var levelUpChoices = [{
	label: "Max HP +3 & Heal",
	value: "hp"
}, {
	label: "Damage +1",
	value: "damage"
}, {
	label: "Heal to Max",
	value: "heal"
}];
for (var i = 0; i < levelUpChoices.length; i++) {
	var btn = new Text2(levelUpChoices[i].label, {
		size: 60,
		fill: "#fff",
		font: "Impact"
	});
	btn.anchor.set(0.5, 0.5);
	btn.visible = false;
	btn.alpha = 0.9;
	// Capture the current choice for this button's event handler
	var currentChoice = levelUpChoices[i];
	btn.down = function () {
		if (!this.visible) return;
		player.levelUp(currentChoice.value);
		hideLevelUpChoices();
		updateGUI();
		// If player still has enough EXP, show the level up button again
		if (!gameOver && player.exp >= player.expToLevel) {
			levelUpBtn.visible = true;
			levelUpBtn.alpha = 1;
		}
	};
	LK.gui.bottom.addChild(btn);
	levelUpChoiceBtns.push(btn);
}
// --- Helper Functions ---
function updateGUI() {
	if (battleScreen.visible) {
		hpText.visible = false;
		dmgText.visible = false;
		expText.visible = false;
		levelText.visible = false;
		monstersLeftText.visible = false;
		levelUpBtn.visible = false;
		for (var i = 0; i < levelUpChoiceBtns.length; i++) {
			levelUpChoiceBtns[i].visible = false;
		}
		battleScreen.updateBattleStats(); // Update battle screen stats when visible
		return;
	} else {
		hpText.visible = true;
		dmgText.visible = true;
		expText.visible = true;
		levelText.visible = true;
		monstersLeftText.visible = true;
	}
	hpText.setText('HP: ' + player.hp + '/' + player.maxHp);
	hpText.x = -200; // Position to the left of center
	hpText.y = -40; // Position near the bottom edge
	dmgText.setText('DMG: ' + player.damage);
	dmgText.x = 0; // Center horizontally
	dmgText.y = -40; // Position near the bottom edge
	expText.setText('EXP: ' + player.exp + '/' + player.expToLevel);
	expText.x = 200; // Position to the right of center
	expText.y = -40; // Position near the bottom edge
	// Position levelText and monstersLeftText side-by-side at the top-center, accounting for 100x100 top-left area
	levelText.setText('LVL: ' + player.level);
	levelText.x = -100; // Position to the left of center (adjusted for safe area)
	levelText.y = 60; // Position near the top edge
	monstersLeftText.setText('Monsters: ' + monstersLeft);
	monstersLeftText.x = 100; // Position to the right of center
	monstersLeftText.y = 60; // Position near the top edge
	// Show level up button if enough exp
	if (!gameOver && player.exp >= player.expToLevel && !levelUpChoiceBtns.some(function (btn) {
		return btn.visible;
	})) {
		levelUpBtn.visible = true;
		levelUpBtn.alpha = 1;
	} else {
		levelUpBtn.visible = false;
	}
}
// Returns true if (row, col) is inside grid
function inBounds(row, col) {
	return row >= 0 && row < GRID_ROWS && col >= 0 && col < GRID_COLS;
}
// Get all adjacent tile positions
function getAdjacent(row, col) {
	var adj = [];
	for (var dr = -1; dr <= 1; dr++) {
		for (var dc = -1; dc <= 1; dc++) {
			if (dr === 0 && dc === 0) continue;
			var nr = row + dr,
				nc = col + dc;
			if (inBounds(nr, nc)) adj.push([nr, nc]);
		}
	}
	return adj;
}
// Reveal empty tiles recursively (flood fill)
function revealEmptyTiles(row, col) {
	var tile = grid[row][col];
	if (tile.revealed) return;
	tile.reveal();
	revealedTiles++;
	if (tile.adjacentMonsters === 0) {
		var adj = getAdjacent(row, col);
		for (var i = 0; i < adj.length; i++) {
			var _adj$i = _slicedToArray(adj[i], 2),
				nr = _adj$i[0],
				nc = _adj$i[1];
			var t = grid[nr][nc];
			if (t instanceof EmptyTile && !t.revealed) {
				revealEmptyTiles(nr, nc);
			}
		}
	}
}
// Reveal all monsters (on game over)
function revealAllMonsters() {
	for (var i = 0; i < tileObjs.length; i++) {
		var t = tileObjs[i];
		if (t instanceof MonsterTile && !t.revealed) {
			t.reveal();
		}
	}
}
// --- Board Generation ---
function generateBoard() {
	// Clear previous
	for (var i = 0; i < tileObjs.length; i++) {
		tileObjs[i].destroy();
	}
	grid = [];
	tileObjs = [];
	monstersLeft = MONSTER_COUNT;
	revealedTiles = 0;
	totalSafeTiles = GRID_COLS * GRID_ROWS - MONSTER_COUNT;
	gameOver = false;
	// Place monsters
	var monsterPositions = [];
	while (monsterPositions.length < MONSTER_COUNT) {
		var r = Math.floor(Math.random() * GRID_ROWS);
		var c = Math.floor(Math.random() * GRID_COLS);
		var key = r + ',' + c;
		var found = false;
		for (var i = 0; i < monsterPositions.length; i++) {
			if (monsterPositions[i][0] === r && monsterPositions[i][1] === c) {
				found = true;
				break;
			}
		}
		if (!found) monsterPositions.push([r, c]);
	}
	// Build grid
	for (var row = 0; row < GRID_ROWS; row++) {
		grid[row] = [];
		for (var col = 0; col < GRID_COLS; col++) {
			var isMonster = false;
			for (var i = 0; i < monsterPositions.length; i++) {
				if (monsterPositions[i][0] === row && monsterPositions[i][1] === col) {
					isMonster = true;
					break;
				}
			}
			var tile;
			// Always place a chest at (0,0) for dev
			if (row === 0 && col === 0) {
				tile = new ChestTile();
			} else if (isMonster) {
				tile = new MonsterTile();
				// Randomize monster stats a bit
				tile.maxHp = tile.hp = 1 + Math.floor(Math.random() * (1 + player.level));
				tile.damage = 1 + Math.floor(Math.random() * (1 + Math.floor(player.level / 2)));
				tile.exp = 1 + Math.floor(Math.random() * 2);
			} else {
				tile = new EmptyTile();
			}
			tile.x = GRID_OFFSET_X + col * TILE_SIZE + TILE_SIZE / 2;
			tile.y = GRID_OFFSET_Y + row * TILE_SIZE + TILE_SIZE / 2;
			game.addChild(tile);
			grid[row][col] = tile;
			tileObjs.push(tile);
		}
	}
	// Set adjacent monster counts for empty tiles
	for (var row = 0; row < GRID_ROWS; row++) {
		for (var col = 0; col < GRID_COLS; col++) {
			var tile = grid[row][col];
			if (tile instanceof EmptyTile) {
				var adj = getAdjacent(row, col);
				var count = 0;
				for (var i = 0; i < adj.length; i++) {
					var _adj$i2 = _slicedToArray(adj[i], 2),
						nr = _adj$i2[0],
						nc = _adj$i2[1];
					if (grid[nr][nc] instanceof MonsterTile) count++;
				}
				tile.adjacentMonsters = count;
			}
		}
	}
}
// --- Game Logic ---
function handleTileDown(x, y, obj) {
	if (gameOver) return;
	if (battleScreen.visible) return; // Don't allow tile interaction if battle screen is up
	// Find which tile was pressed
	for (var i = 0; i < tileObjs.length; i++) {
		var tile = tileObjs[i];
		if (tile.revealed) continue;
		if (tile.cover && tile.cover.alpha > 0.1) {
			// Check if (x, y) is inside tile
			var dx = x - tile.x;
			var dy = y - tile.y;
			if (Math.abs(dx) < TILE_SIZE / 2 && Math.abs(dy) < TILE_SIZE / 2) {
				// Reveal tile
				if (tile instanceof EmptyTile) {
					revealEmptyTiles(Math.floor((tile.y - GRID_OFFSET_Y) / TILE_SIZE), Math.floor((tile.x - GRID_OFFSET_X) / TILE_SIZE));
					updateGUI();
					// Win check
					if (revealedTiles >= totalSafeTiles) {
						LK.showYouWin();
						gameOver = true;
						revealAllMonsters();
					}
				} else if (tile instanceof ChestTile) {
					// Reveal chest and show chest screen
					tile.reveal();
					chestScreen.startChest(tile);
				} else if (tile instanceof MonsterTile) {
					// Reveal monster and start battle
					tile.reveal(); // Reveal the monster visually
					// Start the battle sequence
					battleScreen.startBattle(tile);
				}
				break;
			}
		}
	}
}
// --- Level Up UI ---
function showLevelUpChoices() {
	levelUpBtn.visible = false;
	for (var i = 0; i < levelUpChoiceBtns.length; i++) {
		var btn = levelUpChoiceBtns[i];
		btn.visible = true;
		btn.x = (i - 1) * 400; // x relative to LK.gui.bottom (which is screen center horizontally)
		btn.y = -2732 * 0.15; // Position choices above the bottom boundary of the battle area
		btn.alpha = 1;
	}
}
function hideLevelUpChoices() {
	for (var i = 0; i < levelUpChoiceBtns.length; i++) {
		levelUpChoiceBtns[i].visible = false;
	}
}
// --- Event Handlers ---
game.down = function (x, y, obj) {
	// The click handling for levelUpBtn and levelUpChoiceBtns
	// has been moved to their own 'down' event handlers.
	// Check for tile interactions
	handleTileDown(x, y, obj);
};
game.update = function () {
	if (battleScreen.visible) return; // Don't update game elements when battle screen is up
	// Animate level up button
	if (levelUpBtn.visible) {
		levelUpBtn.x = 0; // Centered horizontally relative to LK.gui.top
		levelUpBtn.y = 120;
		levelUpBtn.alpha = 0.8 + 0.2 * Math.sin(LK.ticks / 20);
	}
	// Animate level up choices
	for (var i = 0; i < levelUpChoiceBtns.length; i++) {
		var btn = levelUpChoiceBtns[i];
		if (btn.visible) {
			btn.x = (i - 1) * 400; // x relative to LK.gui.bottom
			btn.y = -2732 * 0.15; // Position choices above the bottom boundary of the battle area
			btn.alpha = 0.9 + 0.1 * Math.sin(LK.ticks / 15 + i);
		}
	}
	if (battleScreen.visible || chestScreen && chestScreen.visible) {
		for (var i = 0; i < tileObjs.length; i++) {
			tileObjs[i].visible = false;
		}
	} else {
		for (var i = 0; i < tileObjs.length; i++) {
			tileObjs[i].visible = true;
		}
	}
};
// --- Start Game ---
generateBoard();
updateGUI();

===================================================================
--- original.js
+++ change.js
@@ -394,8 +394,101 @@
 		});
 	};
 	return self;
 });
+// ChestScreen: Handles the chest found popup
+var ChestScreen = Container.expand(function () {
+	var self = Container.call(this);
+	self.visible = false;
+	self.alpha = 0;
+	// Background overlay
+	self.overlay = self.attachAsset('emptyTileCover', {
+		width: 2048,
+		height: 2732,
+		alpha: 0.8
+	});
+	// Chest display (center)
+	self.chestDisplay = self.attachAsset('emptyTileBg', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		x: 2048 / 2,
+		y: 2732 / 2 - 100,
+		scaleX: 2,
+		scaleY: 2,
+		color: 0xFFD700 // gold for dev
+	});
+	// "You found a chest!" text
+	self.chestText = new Text2('You found a chest!', {
+		size: 90,
+		fill: 0xFFD700
+	});
+	self.chestText.anchor.set(0.5, 0.5);
+	self.chestText.x = 2048 / 2;
+	self.chestText.y = 2732 / 2 - 350;
+	self.addChild(self.chestText);
+	// Player display (bottom, like battle screen)
+	self.playerDisplay = self.attachAsset('character', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		x: 2048 / 2,
+		y: 2732 * 0.8,
+		scaleX: 2,
+		scaleY: 2
+	});
+	// Start chest screen
+	self.startChest = function (chestTile) {
+		self.currentChest = chestTile;
+		self.visible = true;
+		self.alpha = 0;
+		game.addChild(self);
+		// Fade in
+		tween(self, {
+			alpha: 1
+		}, {
+			duration: 300,
+			easing: tween.easeOut
+		});
+	};
+	// End chest screen
+	self.endChest = function () {
+		self.visible = false;
+		self.alpha = 0;
+		self.currentChest = null;
+		if (self.parent) self.parent.removeChild(self);
+	};
+	return self;
+});
+// ChestTile: Represents a chest hidden under a tile
+var ChestTile = Container.expand(function () {
+	var self = Container.call(this);
+	self.revealed = false;
+	self.opened = false;
+	self.cover = self.attachAsset('emptyTileCover', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Use a chest image asset (use a box for now, engine will replace with chest art)
+	self.chest = self.attachAsset('emptyTileBg', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		color: 0xFFD700,
+		// gold color for dev
+		alpha: 0 // Hidden until revealed
+	});
+	// Reveal the chest
+	self.reveal = function () {
+		if (self.revealed) return;
+		self.revealed = true;
+		self.cover.alpha = 0.2;
+		self.chest.alpha = 1;
+	};
+	// Mark as opened
+	self.open = function () {
+		self.opened = true;
+		// Optionally animate chest opening here
+	};
+	return self;
+});
 // EmptyTile: Represents a safe tile (no monster)
 var EmptyTile = Container.expand(function () {
 	var self = Container.call(this);
 	self.revealed = false;
@@ -614,8 +707,9 @@
 var revealedTiles = 0;
 var totalSafeTiles = GRID_COLS * GRID_ROWS - MONSTER_COUNT;
 var gameOver = false;
 var battleScreen = new BattleScreen();
+var chestScreen = new ChestScreen();
 // --- GUI Elements ---
 var hpText = new Text2('', {
 	size: 40,
 	fill: 0xFF6666
@@ -825,9 +919,12 @@
 					break;
 				}
 			}
 			var tile;
-			if (isMonster) {
+			// Always place a chest at (0,0) for dev
+			if (row === 0 && col === 0) {
+				tile = new ChestTile();
+			} else if (isMonster) {
 				tile = new MonsterTile();
 				// Randomize monster stats a bit
 				tile.maxHp = tile.hp = 1 + Math.floor(Math.random() * (1 + player.level));
 				tile.damage = 1 + Math.floor(Math.random() * (1 + Math.floor(player.level / 2)));
@@ -882,8 +979,12 @@
 						LK.showYouWin();
 						gameOver = true;
 						revealAllMonsters();
 					}
+				} else if (tile instanceof ChestTile) {
+					// Reveal chest and show chest screen
+					tile.reveal();
+					chestScreen.startChest(tile);
 				} else if (tile instanceof MonsterTile) {
 					// Reveal monster and start battle
 					tile.reveal(); // Reveal the monster visually
 					// Start the battle sequence
@@ -933,9 +1034,9 @@
 			btn.y = -2732 * 0.15; // Position choices above the bottom boundary of the battle area
 			btn.alpha = 0.9 + 0.1 * Math.sin(LK.ticks / 15 + i);
 		}
 	}
-	if (battleScreen.visible) {
+	if (battleScreen.visible || chestScreen && chestScreen.visible) {
 		for (var i = 0; i < tileObjs.length; i++) {
 			tileObjs[i].visible = false;
 		}
 	} else {