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

/**** 
* Classes
****/ 
// 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;
			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
		self.x += self.dirX * self.currentSpeed;
		self.y += self.dirY * self.currentSpeed;
		// 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;
});

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

/**** 
* Game Code
****/ 
// --- Global variables ---
// Player car: blue box
// Enemy car: red box
// Bullet: yellow ellipse
var player = new PlayerCar();
game.addChild(player);
var enemies = [];
var bullets = [];
// Score
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
// Timer text (elapsed time in seconds, right of score)
var timerTxt = new Text2('0:00', {
	size: 90,
	fill: 0xFFFFFF
});
timerTxt.anchor.set(0, 0);
// Position timer at the top right of the screen, with a margin from the edge
timerTxt.x = LK.gui.top.width - timerTxt.width - 40;
timerTxt.y = 20;
LK.gui.top.addChild(scoreTxt);
LK.gui.top.addChild(timerTxt);
// For pointer tracking
var pointerX = 2048 / 2;
var pointerY = 2732 / 2;
// For boost
var boosting = false;
// 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: update pointer position and direction
function handleMove(x, y, obj) {
	// Clamp pointer to game area (avoid top left 100x100)
	if (x < 100) x = 100;
	if (y < 100) y = 100;
	if (x > 2048 - 100) x = 2048 - 100;
	if (y > 2732 - 100) y = 2732 - 100;
	pointerX = x;
	pointerY = y;
	player.setDirection(pointerX, pointerY);
}
game.move = handleMove;
// Down: boost on press
game.down = function (x, y, obj) {
	boosting = true;
	player.setBoost(true);
	handleMove(x, y, obj);
};
// Up: stop boost
game.up = function (x, y, obj) {
	boosting = false;
	player.setBoost(false);
};
// --- Main Game Loop ---
game.update = function () {
	// Update player
	player.update();
	// --- 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);
	// 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);
	if (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;
		}
	}
	// --- Auto-shoot at nearest enemy ---
	// Only if there are enemies and cooldown is 0
	if (enemies.length > 0 && player.shootCooldown === 0) {
		// Find nearest enemy
		var minDist = 999999;
		var nearest = null;
		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;
				nearest = enemies[i];
			}
		}
		if (nearest) {
			// Shoot bullet toward nearest enemy 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 enemy
			var bdx = nearest.x - bullet.x;
			var bdy = nearest.y - bullet.y;
			bullet.setDirection(bdx, bdy);
			bullets.push(bullet);
			game.addChild(bullet);
			player.shootCooldown = 30; // 0.5s cooldown
		}
	}
	// --- 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);
				break;
			}
		}
		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.
	// --- Decrement player shoot cooldown ---
	if (player.shootCooldown > 0) player.shootCooldown--;
};
// --- Initial pointer direction ---
player.setDirection(pointerX, pointerY);

===================================================================
--- original.js
+++ change.js
@@ -100,13 +100,13 @@
 	self.update = function () {
 		// Move in direction of pointer
 		self.x += self.dirX * self.currentSpeed;
 		self.y += self.dirY * self.currentSpeed;
-		// Wrap around game area (endless movement)
-		if (self.x < 0) self.x = 2048;
-		if (self.x > 2048) self.x = 0;
-		if (self.y < 0) self.y = 2732;
-		if (self.y > 2732) self.y = 0;
+		// 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
@@ -158,10 +158,10 @@
 	size: 90,
 	fill: 0xFFFFFF
 });
 timerTxt.anchor.set(0, 0);
-// Position timer to the right of score
-timerTxt.x = scoreTxt.width / 2 + 40;
+// Position timer at the top right of the screen, with a margin from the edge
+timerTxt.x = LK.gui.top.width - timerTxt.width - 40;
 timerTxt.y = 20;
 LK.gui.top.addChild(scoreTxt);
 LK.gui.top.addChild(timerTxt);
 // For pointer tracking