/****
* Classes
****/
// Create a class for the bullets
var Bullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('bullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.update = function () {
    // Bullet movement logic goes here
  };
});
// The assets will be automatically created and loaded by the LK engine.
// Create a class for the spaceship
var Spaceship = Container.expand(function () {
  var self = Container.call(this);
  var spaceshipGraphics = self.attachAsset('spaceship', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.update = function () {
    // Spaceship movement logic goes here
  };
});

/****
* Initialize Game
****/
var game = new LK.Game({
  backgroundColor: 0x000000 // Init game with black background 
});

/****
* Game Code
****/
// Initialize the spaceship and bullets
var spaceship = game.addChild(new Spaceship());
spaceship.x = 2048 / 2;
spaceship.y = 2732 - 200;
var bullets = [];
// Handle spaceship movement
game.move = function (x, y, obj) {
  spaceship.x = x;
};
// Handle shooting
game.down = function (x, y, obj) {
  var bullet = new Bullet();
  bullet.x = spaceship.x;
  bullet.y = spaceship.y;
  bullets.push(bullet);
  game.addChild(bullet);
};
// Update game state
game.update = function () {
  for (var i = bullets.length - 1; i >= 0; i--) {
    bullets[i].y -= 10;
    if (bullets[i].y < 0) {
      bullets[i].destroy();
      bullets.splice(i, 1);
    }
  }
};