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

/**** 
* Classes
****/ 
// BossCar Class
var BossCar = Container.expand(function () {
	var self = Container.call(this);
	// Use unique bossCar asset
	var boss = self.attachAsset('bossCar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Target position (player car)
	self.targetX = 2048 / 2;
	self.targetY = 2732 / 2;
	// Speed (increased for faster boss movement)
	self.speed = 7.8; // Reduced by 1
	// Direction vector
	self.dirX = 0;
	self.dirY = 1;
	// For collision
	self.radius = 110; // Reduced hitbox radius for smaller collision area
	// Boss health
	self.maxHealth = 20;
	self.health = self.maxHealth;
	// Update method
	self.update = function () {
		// Move toward target (player car)
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var len = Math.sqrt(dx * dx + dy * dy);
		if (len > 0.01) {
			self.dirX = dx / len;
			self.dirY = dy / len;
			self.x += self.dirX * self.speed;
			self.y += self.dirY * self.speed;
			boss.rotation = Math.atan2(self.dirY, self.dirX) + Math.PI / 2;
		}
	};
	// Set target (player car position)
	self.setTarget = function (x, y) {
		self.targetX = x;
		self.targetY = y;
	};
	// Take damage
	self.takeDamage = function (amount) {
		self.health -= amount;
		if (self.health < 0) self.health = 0;
	};
	return self;
});
// Bullet Class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bullet = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Direction vector
	self.dirX = 0;
	self.dirY = -1;
	// Speed
	self.speed = 38;
	// For collision
	self.radius = 30;
	// Update
	self.update = function () {
		self.x += self.dirX * self.speed;
		self.y += self.dirY * self.speed;
	};
	// Set direction
	self.setDirection = function (dx, dy) {
		var len = Math.sqrt(dx * dx + dy * dy);
		if (len > 0.01) {
			self.dirX = dx / len;
			self.dirY = dy / len;
		}
	};
	return self;
});
// Enemy Car Class
var EnemyCar = Container.expand(function () {
	var self = Container.call(this);
	var car = self.attachAsset('enemyCar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Target position (player car)
	self.targetX = 2048 / 2;
	self.targetY = 2732 / 2;
	// Speed (pixels per tick)
	self.speed = 7;
	// Direction vector
	self.dirX = 0;
	self.dirY = 1;
	// For collision
	self.radius = 90;
	// Update method
	self.update = function () {
		// Move toward target (player car)
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var len = Math.sqrt(dx * dx + dy * dy);
		if (len > 0.01) {
			self.dirX = dx / len;
			self.dirY = dy / len;
			// Enemy car speed is always self.speed, never boosted
			self.x += self.dirX * self.speed;
			self.y += self.dirY * self.speed;
			// Rotate car to face movement
			car.rotation = Math.atan2(self.dirY, self.dirX) + Math.PI / 2;
		}
	};
	// Set target (player car position)
	self.setTarget = function (x, y) {
		self.targetX = x;
		self.targetY = y;
	};
	return self;
});
// Player Car Class
var PlayerCar = Container.expand(function () {
	var self = Container.call(this);
	// Attach car asset, anchor center
	var car = self.attachAsset('playerCar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For visual orientation, add a "gun" at the top (optional)
	// Not required for MVP
	// Movement speed (pixels per tick)
	self.baseSpeed = 12;
	self.boostSpeed = 24;
	self.currentSpeed = self.baseSpeed;
	// Direction vector (normalized)
	self.dirX = 0;
	self.dirY = -1;
	// Set initial position to center
	self.x = 2048 / 2;
	self.y = 2732 / 2;
	// For auto-shoot cooldown
	self.shootCooldown = 0;
	// Update method: called every tick
	self.update = function () {
		// Move in direction of pointer
		// Only move if playerIsMoving is true (set by handleMove)
		if (typeof playerIsMoving !== "undefined" && playerIsMoving) {
			// Calculate next position
			var nextX = self.x + self.dirX * self.currentSpeed;
			var nextY = self.y + self.dirY * self.currentSpeed;
			// Clamp next position to game area bounds
			var minX = 90;
			var maxX = 2048 - 90;
			var minY = 160;
			var maxY = 2732 - 160;
			// Only update X if within bounds
			if (nextX >= minX && nextX <= maxX) {
				self.x = nextX;
			} else if (nextX < minX) {
				self.x = minX;
			} else if (nextX > maxX) {
				self.x = maxX;
			}
			// Only update Y if within bounds
			if (nextY >= minY && nextY <= maxY) {
				self.y = nextY;
			} else if (nextY < minY) {
				self.y = minY;
			} else if (nextY > maxY) {
				self.y = maxY;
			}
		}
		// Clamp to game area (keep inside bounds)
		if (self.x < 90) self.x = 90;
		if (self.x > 2048 - 90) self.x = 2048 - 90;
		if (self.y < 160) self.y = 160;
		if (self.y > 2732 - 160) self.y = 2732 - 160;
		// Cooldown for shooting
		if (self.shootCooldown > 0) self.shootCooldown--;
	};
	// Set direction toward pointer
	self.setDirection = function (targetX, targetY) {
		var dx = targetX - self.x;
		var dy = targetY - self.y;
		var len = Math.sqrt(dx * dx + dy * dy);
		if (len > 0.01) {
			self.dirX = dx / len;
			self.dirY = dy / len;
			// Rotate car to face direction
			car.rotation = Math.atan2(self.dirY, self.dirX) + Math.PI / 2;
		}
	};
	// Boost on press
	self.setBoost = function (boosting) {
		self.currentSpeed = boosting ? self.boostSpeed : self.baseSpeed;
	};
	return self;
});
// PowerUpBox Class: A box that gives player a shoot speed boost when collected
var PowerUpBox = Container.expand(function (useBossDropAsset) {
	var self = Container.call(this);
	var box;
	if (useBossDropAsset) {
		// Use the bossDropBox asset if specified
		box = self.attachAsset('bossDropBox', {
			anchorX: 0.5,
			anchorY: 0.5,
			width: 120,
			height: 120,
			alpha: 0.95
		});
	} else {
		// Use a distinct color for the box
		box = self.attachAsset('centerCircle', {
			anchorX: 0.5,
			anchorY: 0.5,
			width: 120,
			height: 120,
			color: 0x4ddcfe,
			// cyan
			alpha: 0.85
		});
	}
	self.radius = 60;
	// Animate the box (pulse) using correct tween API
	var pulseTween = tween(box, {
		scaleX: 1.2,
		scaleY: 1.2
	}, 500, {
		yoyo: true,
		repeat: Infinity
	});
	// Update (optional: could float or spin)
	self.update = function () {
		// Could add floating or spinning effect here
	};
	// Destroy: stop tween
	self.destroy = function () {
		if (pulseTween && typeof pulseTween.stop === "function") {
			pulseTween.stop();
		}
		Container.prototype.destroy.call(self);
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Asset for the box dropped by BossCar on death
// Add background image to the game
// New background asset
var background = LK.getAsset('background', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2732 / 2
});
game.addChild(background);
// --- Start Screen Overlay ---
var startOverlay = new Container();
var startBg = LK.getAsset('startBg', {
	anchorX: 0.5,
	anchorY: 0.5,
	width: 2048,
	height: 2732,
	x: 2048 / 2,
	y: 2732 / 2,
	alpha: 0.92
});
startOverlay.addChild(startBg);
// Title Text
var titleTxt = new Text2("A Very Simple Tank Battle", {
	size: 220,
	fill: 0x222222
});
titleTxt.anchor.set(0.5, 0); // top center
titleTxt.x = 2048 / 2;
titleTxt.y = 120;
startOverlay.addChild(titleTxt);
// Start Button
var startButton = LK.getAsset('startButton', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 1500
});
startOverlay.addChild(startButton);
var startBtnTxt = new Text2("Play", {
	size: 120,
	fill: 0xFFFFFF,
	font: "'Arial Black', 'Impact', 'GillSans-Bold', 'Arial', 'sans-serif', 'Segoe UI Black', 'Segoe UI', 'Roboto', 'Noto Sans', 'Liberation Sans'" // bold, stylized font stack
});
startBtnTxt.anchor.set(0.5, 0.5);
startBtnTxt.x = 2048 / 2;
startBtnTxt.y = 1500;
startOverlay.addChild(startBtnTxt);
// Add overlay to game
game.addChild(startOverlay);
// Block gameplay until started
var gameStarted = false;
// Only allow controller and gameplay after start
function blockInputUntilStarted(fn) {
	return function (x, y, obj) {
		if (!gameStarted) return;
		return fn(x, y, obj);
	};
}
// --- Replace event handlers to block input until started ---
game.move = blockInputUntilStarted(handleMove);
game.down = blockInputUntilStarted(function (x, y, obj) {
	var d = dist2(x, y, controllerCenterX, controllerCenterY);
	if (d <= controllerRadius) {
		handleMove(x, y, obj);
	}
});
game.up = blockInputUntilStarted(function (x, y, obj) {
	boosting = false;
	player.setBoost(false);
	playerIsMoving = false;
	controllerActive = false;
	controllerTouchId = null;
	lastControllerActive = false;
	lastControllerDirX = 0;
	lastControllerDirY = 0;
	controllerKnob.x = controllerCenterX;
	controllerKnob.y = controllerCenterY;
});
// --- Block update until started ---
var realGameUpdate = function realGameUpdate() {
	// (all original game.update code will be here, see next change_block)
};
game.update = function () {
	// Hide gameplay UI and controller until gameStarted
	if (!gameStarted) {
		// Hide gameplay UI
		scoreTxt.visible = false;
		levelTxt.visible = false;
		timerTxt.visible = false;
		controllerBg.visible = false;
		controllerKnob.visible = false;
		player.visible = false;
		// Hide all enemies, bullets, boss, powerup box if any
		for (var i = 0; i < enemies.length; i++) enemies[i].visible = false;
		for (var i = 0; i < bullets.length; i++) bullets[i].visible = false;
		if (bossCar) bossCar.visible = false;
		if (game._powerUpBox) game._powerUpBox.visible = false;
		return;
	}
	// Show gameplay UI and controller after gameStarted
	scoreTxt.visible = true;
	levelTxt.visible = true;
	timerTxt.visible = true;
	controllerBg.visible = true;
	controllerKnob.visible = true;
	player.visible = true;
	for (var i = 0; i < enemies.length; i++) enemies[i].visible = true;
	for (var i = 0; i < bullets.length; i++) bullets[i].visible = true;
	if (bossCar) bossCar.visible = true;
	if (game._powerUpBox) game._powerUpBox.visible = true;
	realGameUpdate();
};
// --- Start Button Event Handler ---
startButton.down = function (x, y, obj) {
	if (gameStarted) return;
	gameStarted = true;
	if (startOverlay && startOverlay.parent) {
		startOverlay.parent.removeChild(startOverlay);
	}
};
startBtnTxt.down = startButton.down; // Also allow clicking text
// Bullet: yellow ellipse
// Enemy car: red box
// Player car: blue box
// --- Global variables ---
var player = new PlayerCar();
game.addChild(player);
var enemies = [];
var bullets = [];
// Boss state
var bossSpawned = false;
var bossCar = null;
// Score
var score = 0;
var level = 1;
var scoreTxt = new Text2('Score: 0', {
	size: 97.2,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(1, 0); // right align score
// Level text (centered between score and timer)
var levelTxt = new Text2('Level 1', {
	size: 100,
	fill: 0xFFD700 // gold color for level
});
levelTxt.anchor.set(0.5, 0); // center align
// Timer text (elapsed time in seconds, right of score)
var timerTxt = new Text2('0:00', {
	size: 99,
	fill: 0xFFFFFF
});
timerTxt.anchor.set(0, 0); // left align timer
// Position score, level, and timer
// Arrange score, level, and timer in a single horizontal row, evenly spaced
var guiRowY = 10;
var guiSpacing = 80; // horizontal space between counters
// Calculate total width of all counters and spacing
var totalWidth = scoreTxt.width + levelTxt.width + timerTxt.width + 2 * guiSpacing;
var startX = LK.gui.top.width / 2 - totalWidth / 2;
// Score counter (left)
scoreTxt.x = startX + scoreTxt.width;
scoreTxt.y = guiRowY;
// Level counter (center)
levelTxt.x = scoreTxt.x + guiSpacing + levelTxt.width / 2;
levelTxt.y = guiRowY;
// Timer counter (right)
timerTxt.x = levelTxt.x + levelTxt.width / 2 + guiSpacing;
timerTxt.y = guiRowY;
LK.gui.top.addChild(scoreTxt);
LK.gui.top.addChild(levelTxt);
LK.gui.top.addChild(timerTxt);
// For pointer tracking (controller-based)
var pointerX = 2048 / 2;
var pointerY = 2732 / 2;
var playerIsMoving = false; // Start as not moving
// For boost
var boosting = false;
// --- Controller UI ---
// Controller is a circular area at the bottom center of the screen
var controllerRadius = 170;
var controllerCenterX = 2048 / 2;
var controllerCenterY = 2732 - controllerRadius - 60;
// Controller visual (semi-transparent circle)
var controllerBg = LK.getAsset('centerCircle', {
	anchorX: 0.5,
	anchorY: 0.5,
	width: controllerRadius * 2,
	height: controllerRadius * 2,
	color: 0x888888,
	alpha: 0.25,
	x: controllerCenterX,
	y: controllerCenterY
});
game.addChild(controllerBg);
// Controller knob (shows current direction)
var knobRadius = 80;
var controllerKnob = LK.getAsset('centerCircle', {
	anchorX: 0.5,
	anchorY: 0.5,
	width: knobRadius * 2,
	height: knobRadius * 2,
	color: 0x2980ff,
	alpha: 0.7,
	x: controllerCenterX,
	y: controllerCenterY
});
game.addChild(controllerKnob);
// Track controller state
var controllerActive = false;
var controllerTouchId = null;
// Persistent controller direction for continuous movement
var lastControllerActive = false;
var lastControllerDirX = 0;
var lastControllerDirY = 0;
// Helper: get distance between two points
function dist2(x1, y1, x2, y2) {
	var dx = x1 - x2;
	var dy = y1 - y2;
	return Math.sqrt(dx * dx + dy * dy);
}
// For enemy spawn timer
var enemySpawnTicks = 0;
// Dynamic spawn interval variables
var ENEMY_SPAWN_INTERVAL_START = 180; // 3 seconds at 60fps
var ENEMY_SPAWN_INTERVAL_END = 60; // 1 second at 60fps
var ENEMY_SPAWN_INTERVAL = ENEMY_SPAWN_INTERVAL_START;
// Timer for game progression (in ticks)
var gameTimerTicks = 0;
var GAME_TIMER_MAX = 60 * 60; // 60 seconds to reach max difficulty
// --- Event Handlers ---
// Move: handle controller input only if inside controller area
function handleMove(x, y, obj) {
	// Only respond to touches inside controller area or if already dragging controller
	var isTouch = obj && obj.event && typeof obj.event.identifier !== "undefined";
	var touchId = isTouch ? obj.event.identifier : null;
	// If not already active, only activate if touch is inside controller
	if (!controllerActive) {
		var d = dist2(x, y, controllerCenterX, controllerCenterY);
		if (d <= controllerRadius) {
			controllerActive = true;
			controllerTouchId = touchId;
		} else {
			// Ignore touches outside controller
			return;
		}
	} else {
		// If already active, only respond to the same touch
		if (isTouch && controllerTouchId !== null && touchId !== controllerTouchId) {
			return;
		}
	}
	// Calculate direction from controller center to touch
	var dx = x - controllerCenterX;
	var dy = y - controllerCenterY;
	var len = Math.sqrt(dx * dx + dy * dy);
	// Clamp knob to controller radius
	var knobX = controllerCenterX;
	var knobY = controllerCenterY;
	if (len > controllerRadius) {
		dx = dx * controllerRadius / len;
		dy = dy * controllerRadius / len;
		knobX += dx;
		knobY += dy;
	} else {
		knobX = x;
		knobY = y;
	}
	controllerKnob.x = knobX;
	controllerKnob.y = knobY;
	// If movement is significant, set direction and move
	if (len > 30) {
		// Move player in the direction of the knob relative to controller center
		player.setDirection(player.x + dx, player.y + dy);
		playerIsMoving = true;
		// Store last direction for persistent movement
		lastControllerDirX = dx / len;
		lastControllerDirY = dy / len;
		lastControllerActive = true;
	} else {
		playerIsMoving = false;
		lastControllerActive = false;
	}
	if (typeof LK !== "undefined" && typeof LK.ticks !== "undefined") {
		lastMoveTick = LK.ticks;
	}
}
game.move = handleMove;
// Down: only activate boost if controller is pressed
game.down = function (x, y, obj) {
	var d = dist2(x, y, controllerCenterX, controllerCenterY);
	// Do not activate boost on controller press anymore
	if (d <= controllerRadius) {
		handleMove(x, y, obj);
	}
};
// Up: stop boost and controller movement
game.up = function (x, y, obj) {
	boosting = false;
	player.setBoost(false);
	playerIsMoving = false;
	controllerActive = false;
	controllerTouchId = null;
	// Reset persistent controller direction
	lastControllerActive = false;
	lastControllerDirX = 0;
	lastControllerDirY = 0;
	// Reset knob to center
	controllerKnob.x = controllerCenterX;
	controllerKnob.y = controllerCenterY;
};
// --- Main Game Loop ---
// All main game logic is now in realGameUpdate for start screen support
var realGameUpdate = function realGameUpdate() {
	// Update player
	// If controller was last dragged in a direction, keep moving in that direction
	if (typeof lastControllerActive !== "undefined" && lastControllerActive && typeof lastControllerDirX !== "undefined" && typeof lastControllerDirY !== "undefined") {
		// Set direction to last drag direction
		player.dirX = lastControllerDirX;
		player.dirY = lastControllerDirY;
		playerIsMoving = true;
	}
	// Handle shoot speed boost timer
	if (player._shootBoostActive) {
		if (typeof player._shootBoostTicks === "undefined") player._shootBoostTicks = 0;
		player._shootBoostTicks--;
		if (player._shootBoostTicks <= 0) {
			player._shootBoostActive = false;
		}
	}
	player.update();
	// If no move event occurred this frame, stop player movement
	if (typeof LK !== "undefined" && typeof LK.ticks !== "undefined") {
		if (typeof lastMoveTick === "undefined") {
			lastMoveTick = LK.ticks;
		}
		if (lastMoveTick !== LK.ticks) {
			// Only stop if controller is not active
			if (!lastControllerActive) {
				playerIsMoving = false;
			}
		}
	}
	// --- Timer and Dynamic Enemy Spawning ---
	gameTimerTicks++;
	// Update timer text (show mm:ss)
	var elapsedSec = Math.floor(gameTimerTicks / 60);
	var min = Math.floor(elapsedSec / 60);
	var sec = elapsedSec % 60;
	timerTxt.setText(min + ':' + (sec < 10 ? '0' : '') + sec);
	// Every second, increase spawn rate by reducing ENEMY_SPAWN_INTERVAL_START, but clamp to ENEMY_SPAWN_INTERVAL_END
	if (gameTimerTicks % 60 === 0) {
		ENEMY_SPAWN_INTERVAL_START = Math.max(ENEMY_SPAWN_INTERVAL_END, ENEMY_SPAWN_INTERVAL_START - 5);
	}
	// Calculate progression (0 to 1)
	var progress = Math.min(gameTimerTicks / GAME_TIMER_MAX, 1);
	// Linearly interpolate spawn interval from start to end
	ENEMY_SPAWN_INTERVAL = Math.round(ENEMY_SPAWN_INTERVAL_START + (ENEMY_SPAWN_INTERVAL_END - ENEMY_SPAWN_INTERVAL_START) * progress);
	enemySpawnTicks++;
	// Determine how many enemies to spawn this cycle (1 + extra for every 10 kills)
	var spawnCount = 1 + Math.floor(score / 10);
	// Boss spawn logic
	if (!bossSpawned && score >= 10) {
		bossSpawned = true;
		bossCar = new BossCar();
		// Spawn boss at random edge
		var edge = Math.floor(Math.random() * 4);
		var bx, by;
		if (edge === 0) {
			bx = 200 + Math.random() * (2048 - 400);
			by = -300;
		} else if (edge === 1) {
			bx = 2048 + 300;
			by = 200 + Math.random() * (2732 - 400);
		} else if (edge === 2) {
			bx = 200 + Math.random() * (2048 - 400);
			by = 2732 + 300;
		} else {
			bx = -300;
			by = 200 + Math.random() * (2732 - 400);
		}
		bossCar.x = bx;
		bossCar.y = by;
		bossCar.setTarget(player.x, player.y);
		game.addChild(bossCar);
	}
	// Only spawn normal enemies if boss is not spawned
	if (!bossSpawned && enemySpawnTicks >= ENEMY_SPAWN_INTERVAL) {
		enemySpawnTicks = 0;
		for (var spawnIdx = 0; spawnIdx < spawnCount; spawnIdx++) {
			// Spawn enemy at random edge
			var edge = Math.floor(Math.random() * 4); // 0:top, 1:right, 2:bottom, 3:left
			var ex, ey;
			if (edge === 0) {
				// top
				ex = 200 + Math.random() * (2048 - 400);
				ey = -160;
			} else if (edge === 1) {
				// right
				ex = 2048 + 160;
				ey = 200 + Math.random() * (2732 - 400);
			} else if (edge === 2) {
				// bottom
				ex = 200 + Math.random() * (2048 - 400);
				ey = 2732 + 160;
			} else {
				// left
				ex = -160;
				ey = 200 + Math.random() * (2732 - 400);
			}
			var enemy = new EnemyCar();
			enemy.x = ex;
			enemy.y = ey;
			enemy.setTarget(player.x, player.y);
			enemies.push(enemy);
			game.addChild(enemy);
		}
	}
	// --- Update Enemies ---
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		enemy.setTarget(player.x, player.y);
		enemy.update();
		// Check collision with player (circle collision)
		var dx = enemy.x - player.x;
		var dy = enemy.y - player.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < 160) {
			// Game over
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
	}
	// --- Update BossCar ---
	if (bossSpawned && bossCar) {
		bossCar.setTarget(player.x, player.y);
		bossCar.update();
		// Check collision with player (circle collision, bigger radius)
		var bdx = bossCar.x - player.x;
		var bdy = bossCar.y - player.y;
		var bdist = Math.sqrt(bdx * bdx + bdy * bdy);
		if (bdist < 220) {
			// Game over
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
		// BossCar damages enemies it collides with (just like player does)
		for (var i = enemies.length - 1; i >= 0; i--) {
			var enemy = enemies[i];
			var edx = bossCar.x - enemy.x;
			var edy = bossCar.y - enemy.y;
			var edist = Math.sqrt(edx * edx + edy * edy);
			if (edist < 160) {
				// Remove enemy
				enemy.destroy();
				enemies.splice(i, 1);
				// Optionally, you could increment score or add effect, but for now just remove
			}
		}
		// If boss defeated, show win
		if (bossCar.health <= 0) {
			// Spawn power-up box at boss position, using bossDropBox asset
			var powerUpBox = new PowerUpBox(true);
			powerUpBox.x = bossCar.x;
			powerUpBox.y = bossCar.y;
			game.addChild(powerUpBox);
			// Store reference for collision check
			game._powerUpBox = powerUpBox;
			bossCar.destroy();
			bossCar = null;
			level = 2;
			if (typeof levelTxt !== "undefined") {
				levelTxt.setText("Level " + level);
			}
			LK.effects.flashScreen(0x00ff00, 1000);
			// Do NOT show win yet; wait for player to collect power-up
			// LK.showYouWin();
			// return;
		}
	}
	// --- PowerUpBox pickup check ---
	if (game._powerUpBox) {
		var dx = player.x - game._powerUpBox.x;
		var dy = player.y - game._powerUpBox.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < 120) {
			// Picked up!
			game._powerUpBox.destroy();
			game._powerUpBox = null;
			// Apply shoot speed boost (reduce cooldown)
			player._shootBoostActive = true;
			player._shootBoostTicks = 60 * 8; // 8 seconds
			player.shootCooldown = 0; // allow instant shot
			// Visual feedback (flash)
			LK.effects.flashObject(player, 0x4ddcfe, 800);
			// Show win after pickup
			LK.effects.flashScreen(0x00ff00, 1000);
			LK.showYouWin();
			return;
		}
	}
	// --- Auto-shoot at nearest enemy or bossCar ---
	// If there are enemies, shoot at nearest enemy. If not, and bossCar is present, shoot at bossCar.
	if (player.shootCooldown === 0) {
		var target = null;
		if (enemies.length > 0) {
			// Find nearest enemy
			var minDist = 999999;
			for (var i = 0; i < enemies.length; i++) {
				var dx = enemies[i].x - player.x;
				var dy = enemies[i].y - player.y;
				var d = dx * dx + dy * dy;
				if (d < minDist) {
					minDist = d;
					target = enemies[i];
				}
			}
		} else if (bossSpawned && bossCar) {
			// Only target bossCar if within enemy range (same as enemy targeting)
			var dx = bossCar.x - player.x;
			var dy = bossCar.y - player.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < 900) {
				// 900 is 30*30, but enemy targeting uses squared distance, so use same
				target = bossCar;
			}
		}
		if (target) {
			// Shoot bullet toward target from top of car
			var bullet = new Bullet();
			// Place bullet at top of car (offset in direction of car)
			var carDir = Math.atan2(player.dirY, player.dirX);
			var offsetX = Math.cos(carDir) * 180;
			var offsetY = Math.sin(carDir) * 180;
			bullet.x = player.x + offsetX;
			bullet.y = player.y + offsetY;
			// Direction: from bullet to target
			var bdx = target.x - bullet.x;
			var bdy = target.y - bullet.y;
			bullet.setDirection(bdx, bdy);
			bullets.push(bullet);
			game.addChild(bullet);
			player.shootCooldown = player._shootBoostActive ? 12 : 30; // Faster fire if boost active
		}
	}
	// --- Update Bullets ---
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		bullet.update();
		// Remove if out of bounds
		if (bullet.x < -100 || bullet.x > 2048 + 100 || bullet.y < -100 || bullet.y > 2732 + 100) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		var hit = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			var dx = bullet.x - enemy.x;
			var dy = bullet.y - enemy.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < 100) {
				// Hit!
				hit = true;
				// Remove enemy
				enemy.destroy();
				enemies.splice(j, 1);
				// Remove bullet
				bullet.destroy();
				bullets.splice(i, 1);
				// Score
				score++;
				scoreTxt.setText('Score: ' + score);
				break;
			}
		}
		// Check collision with bossCar if spawned, but only if in range (same as enemy range)
		if (!hit && bossSpawned && bossCar && function () {
			var dx = bullet.x - bossCar.x;
			var dy = bullet.y - bossCar.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			return dist < 100; // Use same range as enemy hit
		}()) {
			// Hit boss!
			hit = true;
			bossCar.takeDamage(1);
			bullet.destroy();
			bullets.splice(i, 1);
			// Optionally, flash boss or show health bar (not required for MVP)
		}
		if (hit) continue;
	}
	// --- Camera: keep player centered ---
	// (In LK, the game area is fixed, so we simulate by keeping player in center and moving everything else if needed)
	// For MVP, player always stays in center, so no need to move camera.
};
// --- Initial pointer direction ---
// No initial movement; player will move when controller is used
player.setDirection(player.x, player.y - 1);

===================================================================
--- original.js
+++ change.js
@@ -279,31 +279,16 @@
 	y: 2732 / 2,
 	alpha: 0.92
 });
 startOverlay.addChild(startBg);
-// Title background behind the text
-var titleBgWidth = 1100;
-var titleBgHeight = 270;
-var titleBg = LK.getAsset('centerCircle', {
-	anchorX: 0.5,
-	anchorY: 0.5,
-	width: titleBgWidth,
-	height: titleBgHeight,
-	color: 0xFFFFFF,
-	alpha: 0.85,
-	x: 2048 / 2,
-	y: 250
-});
-startOverlay.addChild(titleBg);
 // Title Text
-var titleTxt = new Text2("Simple Tank War", {
-	size: 200,
-	fill: 0x222222,
-	font: "'Arial Black', 'Impact', 'GillSans-Bold', 'Arial', 'sans-serif', 'Segoe UI Black', 'Segoe UI', 'Roboto', 'Noto Sans', 'Liberation Sans'"
+var titleTxt = new Text2("A Very Simple Tank Battle", {
+	size: 220,
+	fill: 0x222222
 });
-titleTxt.anchor.set(0.5, 0.5);
+titleTxt.anchor.set(0.5, 0); // top center
 titleTxt.x = 2048 / 2;
-titleTxt.y = 250;
+titleTxt.y = 120;
 startOverlay.addChild(titleTxt);
 // Start Button
 var startButton = LK.getAsset('startButton', {
 	anchorX: 0.5,