Upit | Learn about creating the game Urban Air Defense with gen AI

var Sun = Container.expand(function () {
	var self = Container.call(this);
	var sunGraphics = self.createAsset('sun', 'Sun Graphics', 0.5, 0);
	self.x = 0;
	self.y = 50;
	self.move = function () {
		self.x += 0.1;
		if (self.x > 2048) {
			self.x = -sunGraphics.width;
		}
	};
});
var Missile = Container.expand(function () {
	var self = Container.call(this);
	var missileGraphics = self.createAsset('missile', 'Missile Graphics', .5, .5);
	self.speed = 5;
	self.missileSpeedModifier = 1.0;
	self.setSpeedModifier = function (modifier) {
		self.missileSpeedModifier = modifier;
	};
	self.move = function () {
		self.y += self.speed * self.missileSpeedModifier;
	};
});
var City = Container.expand(function () {
	var self = Container.call(this);
	var cityGraphics = self.createAsset('city', 'City Graphics', .5, .5);
	var cityGraphics = self.createAsset('city', 'City Graphics', .5, .5);
});
var DefenseMissile = Container.expand(function () {
	var self = Container.call(this);
	var defenseMissileGraphics = self.createAsset('defenseMissile', 'Defense Missile Graphics', .5, .5);
	self.speed = -5;
	self.move = function () {
		self.y += self.speed;
	};
});
var ScoreBoard = Container.expand(function () {
	var self = Container.call(this);
	var score = 0;
	var scoreText = new Text2(score.toString(), {
		size: 150,
		fill: "#ffffff"
	});
	scoreText.anchor.set(0.5, 0);
	scoreText.x = 2048 / 2;
	scoreText.y = 50;
	self.addChild(scoreText);
	self.updateScore = function (points) {
		score += points;
		scoreText.setText(score.toString());
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var scoreBoard = self.addChild(new ScoreBoard());
	var sun = self.addChild(new Sun());
	LK.stageContainer.setBackgroundColor(0x87CEEB);
	var missiles = [];
	var cities = [];
	var defenseMissiles = [];
	var isGameOver = false;
	var tickOffset = 0;
	for (var i = 0; i < 6; i++) {
		var city = self.addChild(new City());
		city.x = 2048 / 6 * i + 2048 / 12;
		city.y = 2732 - city.height / 2;
		cities.push(city);
	}
	LK.on('tick', function () {
		for (var i = 0; i < missiles.length; i++) {
			missiles[i].move();
			if (missiles[i].y > 2732) {
				missiles[i].destroy();
				missiles.splice(i, 1);
				i--;
				missileSpeedModifier *= 1.005;
				scoreBoard.updateScore(1);
			}
		}
		for (var i = 0; i < defenseMissiles.length; i++) {
			defenseMissiles[i].move();
			for (var j = 0; j < missiles.length; j++) {
				if (defenseMissiles[i].intersects(missiles[j])) {
					defenseMissiles[i].destroy();
					defenseMissiles.splice(i, 1);
					missiles[j].destroy();
					missiles.splice(j, 1);
					missileSpawnRate = Math.max(20, missileSpawnRate - 1);
					i--;
					scoreBoard.updateScore(1);
					break;
				}
			}
			if (defenseMissiles[i] && defenseMissiles[i].y < 0) {
				defenseMissiles[i].destroy();
				defenseMissiles.splice(i, 1);
				i--;
			}
		}
		for (var i = 0; i < missiles.length; i++) {
			for (var j = 0; j < cities.length; j++) {
				if (missiles[i].intersects(cities[j])) {
					missiles[i].destroy();
					missiles.splice(i, 1);
					i--;
					cities[j].destroy();
					cities.splice(j, 1);
					j--;
					break;
				}
			}
		}
		if (cities.length == 0) {
			isGameOver = true;
		}
		if (isGameOver) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
		var missileSpawnRate = 60;
		var missileSpeedModifier = 1.0;
		sun.move();
		if (tickOffset++ % missileSpawnRate == 0) {
			var newMissile = new Missile(missileSpeedModifier);
			newMissile.x = Math.random() * 2048;
			newMissile.y = 0;
			missiles.push(newMissile);
			self.addChild(newMissile);
		}
	});
	stage.on('down', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		var newDefenseMissile = new DefenseMissile();
		newDefenseMissile.x = pos.x;
		newDefenseMissile.y = 2732;
		defenseMissiles.push(newDefenseMissile);
		self.addChild(newDefenseMissile);
	});
});
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