/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ var EnemyBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('enemyBullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 6; self.velocityX = 0; self.velocityY = 0; self.setVelocity = function (vx, vy) { self.velocityX = vx; self.velocityY = vy; }; self.update = function () { self.x += self.velocityX; self.y += self.velocityY; }; return self; }); var PlayerBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('playerBullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 12; self.update = function () { self.y -= self.speed; }; return self; }); var PlayerTank = Container.expand(function () { var self = Container.call(this); var tankGraphics = self.attachAsset('playerTank', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 8; self.fireRate = 15; self.fireTimer = 0; self.update = function () { if (self.fireTimer > 0) { self.fireTimer--; } }; self.canFire = function () { return self.fireTimer <= 0; }; self.fire = function () { if (self.canFire()) { self.fireTimer = self.fireRate; return true; } return false; }; return self; }); var SmallUFO = Container.expand(function () { var self = Container.call(this); var smallUfoGraphics = self.attachAsset('ufo', { anchorX: 0.5, anchorY: 0.5, scaleX: 0.3, scaleY: 0.3 }); self.speed = 3; self.direction = Math.random() < 0.5 ? -1 : 1; self.fireTimer = 0; self.fireRate = 120; self.update = function () { self.x += self.speed * self.direction; if (self.x > 1900 || self.x < 148) { self.direction *= -1; } self.fireTimer++; if (self.fireTimer >= self.fireRate) { self.fireTimer = 0; return true; } return false; }; return self; }); var Spaceship = Container.expand(function () { var self = Container.call(this); var spaceshipGraphics = self.attachAsset('spaceship', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 2; self.direction = 1; self.deployTimer = 0; self.deployRate = 180; self.movePattern = Math.random() < 0.5 ? 'horizontal' : 'diagonal'; self.update = function () { if (self.movePattern === 'horizontal') { self.x += self.speed * self.direction; if (self.x > 1900 || self.x < 148) { self.direction *= -1; } } else { self.x += self.speed * self.direction; self.y += self.speed * 0.5; if (self.x > 1900 || self.x < 148) { self.direction *= -1; } } self.deployTimer++; if (self.deployTimer >= self.deployRate) { self.deployTimer = 0; return true; } return false; }; return self; }); var UFO = Container.expand(function () { var self = Container.call(this); var ufoGraphics = self.attachAsset('ufo', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 2; self.direction = 1; self.verticalSpeed = 0.5; self.fireTimer = 0; self.fireRate = 80; self.isMoving = false; self.hitCount = 0; self.maxHits = 30; self.level = 1; self.startMovement = function () { if (!self.isMoving) { self.isMoving = true; self.moveLeftRight(); } }; self.moveLeftRight = function () { var targetX = self.direction > 0 ? 1600 : 448; tween(self, { x: targetX }, { duration: 4000, easing: tween.linear, onFinish: function onFinish() { self.direction *= -1; self.moveLeftRight(); } }); }; self.update = function () { if (!self.isMoving) { self.startMovement(); } self.fireTimer++; if (self.fireTimer >= self.fireRate) { self.fireTimer = 0; return 'fire'; } // Deploy spaceship every 240 frames (4 seconds) if (self.fireTimer % 240 === 0) { return 'deploy'; } return false; }; self.hit = function () { self.hitCount++; if (self.hitCount >= self.maxHits) { // UFO dies after 21 hits return 'destroy'; } return false; // UFO not dead yet }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000033 }); /**** * Game Code ****/ var background = LK.getAsset('background', { anchorX: 0, anchorY: 0, x: 0, y: 0, width: 2048, height: 2732 }); game.addChild(background); var player = new PlayerTank(); player.x = 1024; player.y = 2450; game.addChild(player); var playerBullets = []; var spaceships = []; var ufos = []; var smallUfos = []; var enemyBullets = []; var spawnTimer = 0; var spawnRate = 120; var ufoSpawnTimer = 0; var ufoSpawnRate = 600; var hasActiveUFO = false; var enemyFireTimer = 0; var enemyFireRate = 90; var currentLevel = 1; var maxLevel = 10; var enemiesKilledThisLevel = 0; var enemiesToKillForNextLevel = 1; var playerLives = 3; var maxLives = 3; var lastScoreMilestone = 0; var scoreTxt = new Text2('Score: 0', { size: 60, fill: 0xFFFFFF }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); var levelTxt = new Text2('Level: 1', { size: 60, fill: 0xFFFF00 }); levelTxt.anchor.set(0.5, 0); levelTxt.x = 0; levelTxt.y = 80; LK.gui.top.addChild(levelTxt); var lifeHearts = []; for (var lifeIndex = 0; lifeIndex < maxLives; lifeIndex++) { var lifeIcon = LK.getAsset('playerTank', { anchorX: 0, anchorY: 1, scaleX: 0.2, scaleY: 0.2 }); lifeIcon.x = 120 + lifeIndex * 80; lifeIcon.y = -20; lifeHearts.push(lifeIcon); LK.gui.bottomLeft.addChild(lifeIcon); } function updateScore() { scoreTxt.setText('Score: ' + LK.getScore()); } function updateLevel() { levelTxt.setText('Level: ' + currentLevel); } function updateLives() { for (var i = 0; i < maxLives; i++) { if (i < playerLives) { lifeHearts[i].alpha = 1.0; } else { lifeHearts[i].alpha = 0.3; } } } function checkLevelProgression() { var shouldLevelUp = false; // Check if we should level up based on UFO kills only if (enemiesKilledThisLevel >= enemiesToKillForNextLevel) { if (currentLevel < maxLevel) { shouldLevelUp = true; currentLevel++; enemiesKilledThisLevel = 0; enemiesToKillForNextLevel = 1; // Only need 1 UFO kill to advance } } if (shouldLevelUp) { if (currentLevel >= maxLevel) { // Player completed all levels LK.showYouWin(); } else { updateLevel(); // Increase difficulty based on level spawnRate = Math.max(30, 120 - (currentLevel - 1) * 10); enemyFireRate = Math.max(20, 90 - (currentLevel - 1) * 8); // Flash screen to indicate level up LK.effects.flashScreen(0x00ffff, 1000); // Cyan flash for level up } } } function spawnSpaceship() { var spaceship = new Spaceship(); // If there's an active UFO, spawn from its position if (hasActiveUFO && ufos.length > 0) { spaceship.x = ufos[0].x; spaceship.y = ufos[0].y + 100; // Spawn slightly below UFO } else { spaceship.x = Math.random() * 1800 + 124; spaceship.y = -50; } spaceships.push(spaceship); game.addChild(spaceship); } function spawnUFO() { if (!hasActiveUFO && ufos.length === 0) { var ufo = new UFO(); ufo.x = 1024; ufo.y = 200; // Make subsequent UFOs stronger if (currentLevel > 1) { ufo.level = Math.min(currentLevel, 5); ufo.fireRate = Math.max(20, 80 - (ufo.level - 1) * 15); var newScale = 1 + (ufo.level - 1) * 0.2; ufo.scaleX = newScale; ufo.scaleY = newScale; } ufos.push(ufo); game.addChild(ufo); hasActiveUFO = true; } } function deploySmallUFO(fromX, fromY) { var smallUfo = new SmallUFO(); smallUfo.x = fromX; smallUfo.y = fromY; smallUfos.push(smallUfo); game.addChild(smallUfo); LK.getSound('uavDeploy').play(); } function clearAllEnemiesAndStartNewLevel() { // Destroy all spaceships for (var i = spaceships.length - 1; i >= 0; i--) { spaceships[i].destroy(); } spaceships = []; // Destroy all small UFOs for (var j = smallUfos.length - 1; j >= 0; j--) { smallUfos[j].destroy(); } smallUfos = []; // Destroy all UFOs for (var k = ufos.length - 1; k >= 0; k--) { ufos[k].destroy(); } ufos = []; hasActiveUFO = false; // Destroy all enemy bullets for (var l = enemyBullets.length - 1; l >= 0; l--) { enemyBullets[l].destroy(); } enemyBullets = []; // Don't automatically advance level - let normal progression handle it // Just check if we should advance based on current kills checkLevelProgression(); } function fireEnemyBullet(fromX, fromY) { var bullet = new EnemyBullet(); bullet.x = fromX; bullet.y = fromY; bullet.setVelocity(0, 6); enemyBullets.push(bullet); game.addChild(bullet); } game.down = function (x, y, obj) { // Move player to touch position player.x = x; // Keep player within screen boundaries if (player.x > 1988) { player.x = 1988; } if (player.x < 60) { player.x = 60; } // Shooting now handled by up event for better control }; game.move = function (x, y, obj) { // Move player horizontally based on touch/mouse position player.x = x; // Keep player within screen boundaries if (player.x > 1988) { player.x = 1988; } if (player.x < 60) { player.x = 60; } }; game.up = function (x, y, obj) { // Fire bullet when releasing touch/click if (player.fire()) { var bullet = new PlayerBullet(); bullet.x = player.x; bullet.y = player.y - 40; playerBullets.push(bullet); game.addChild(bullet); LK.getSound('playerShoot').play(); } }; game.update = function () { // Check for score milestones to award extra lives var currentScore = LK.getScore(); var currentMilestone2500 = Math.floor(currentScore / 2500); var currentMilestone5000 = Math.floor(currentScore / 5000); if (currentMilestone2500 > lastScoreMilestone) { // Award extra life for reaching 2500 point milestone if (playerLives < maxLives) { playerLives++; updateLives(); LK.effects.flashScreen(0x00ff00, 1000); // Green flash for life reward } lastScoreMilestone = currentMilestone2500; } // Check for 5000 point milestones if (currentMilestone5000 > 0 && currentScore >= currentMilestone5000 * 5000 && currentScore - 5000 < (currentMilestone5000 - 1) * 5000) { // Award extra life for reaching 5000 point milestone if (playerLives < maxLives) { playerLives++; updateLives(); LK.effects.flashScreen(0x00ff00, 1000); // Green flash for life reward } } // Player movement is now handled by touch/mouse controls // Spawn spaceships spawnTimer++; if (spawnTimer >= spawnRate) { spawnTimer = 0; spawnSpaceship(); } // Spawn UFOs ufoSpawnTimer++; if (ufoSpawnTimer >= ufoSpawnRate && !hasActiveUFO) { ufoSpawnTimer = 0; spawnUFO(); } // Difficulty is now controlled by level progression // Player auto-fire removed - now controlled by touch // Enemy firing enemyFireTimer++; if (enemyFireTimer >= enemyFireRate) { enemyFireTimer = 0; if (spaceships.length > 0) { var randomSpaceship = spaceships[Math.floor(Math.random() * spaceships.length)]; fireEnemyBullet(randomSpaceship.x, randomSpaceship.y); } } // Update player bullets for (var i = playerBullets.length - 1; i >= 0; i--) { var bullet = playerBullets[i]; if (bullet.lastY === undefined) bullet.lastY = bullet.y; if (bullet.lastY >= -20 && bullet.y < -20) { bullet.destroy(); playerBullets.splice(i, 1); continue; } bullet.lastY = bullet.y; } // Update spaceships for (var j = spaceships.length - 1; j >= 0; j--) { var spaceship = spaceships[j]; if (spaceship.lastY === undefined) spaceship.lastY = spaceship.y; if (spaceship.deployCount === undefined) spaceship.deployCount = 0; var shouldDeploy = spaceship.update(); if (shouldDeploy) { deploySmallUFO(spaceship.x, spaceship.y); } if (spaceship.lastY < 2732 && spaceship.y >= 2732) { playerLives--; updateLives(); spaceship.destroy(); spaceships.splice(j, 1); LK.effects.flashScreen(0xff0000, 1000); if (playerLives <= 0) { LK.showGameOver(); return; } continue; } spaceship.lastY = spaceship.y; } // Update small UFOs for (var su = smallUfos.length - 1; su >= 0; su--) { var smallUfo = smallUfos[su]; if (smallUfo.lastY === undefined) smallUfo.lastY = smallUfo.y; var shouldFire = smallUfo.update(); if (shouldFire) { fireEnemyBullet(smallUfo.x, smallUfo.y); } if (smallUfo.lastY < 2732 && smallUfo.y >= 2732) { playerLives--; updateLives(); smallUfo.destroy(); smallUfos.splice(su, 1); LK.effects.flashScreen(0xff0000, 1000); if (playerLives <= 0) { LK.showGameOver(); return; } continue; } smallUfo.lastY = smallUfo.y; } // Update UFOs - only one UFO at a time if (ufos.length > 0) { var ufo = ufos[0]; if (ufo.lastY === undefined) ufo.lastY = ufo.y; var action = ufo.update(); if (action === 'fire') { fireEnemyBullet(ufo.x, ufo.y); } else if (action === 'deploy') { spawnSpaceship(); } if (ufo.lastY < 2732 && ufo.y >= 2732) { playerLives--; updateLives(); ufo.destroy(); ufos.splice(0, 1); hasActiveUFO = false; LK.effects.flashScreen(0xff0000, 1000); if (playerLives <= 0) { LK.showGameOver(); return; } } ufo.lastY = ufo.y; } // Update enemy bullets for (var l = enemyBullets.length - 1; l >= 0; l--) { var enemyBullet = enemyBullets[l]; if (enemyBullet.lastY === undefined) enemyBullet.lastY = enemyBullet.y; if (enemyBullet.lastX === undefined) enemyBullet.lastX = enemyBullet.x; // Destroy bullet if it goes off-screen (top) if (enemyBullet.lastY >= -20 && enemyBullet.y < -20) { enemyBullet.destroy(); enemyBullets.splice(l, 1); continue; } // Destroy bullet if it goes off-screen (bottom) if (enemyBullet.lastY < 2732 && enemyBullet.y >= 2732) { enemyBullet.destroy(); enemyBullets.splice(l, 1); continue; } // Destroy bullet if it goes off-screen (left side) if (enemyBullet.lastX >= 0 && enemyBullet.x < 0) { enemyBullet.destroy(); enemyBullets.splice(l, 1); continue; } // Destroy bullet if it goes off-screen (right side) if (enemyBullet.lastX <= 2048 && enemyBullet.x > 2048) { enemyBullet.destroy(); enemyBullets.splice(l, 1); continue; } enemyBullet.lastY = enemyBullet.y; enemyBullet.lastX = enemyBullet.x; } // Collision detection - Player bullets vs Spaceships for (var m = playerBullets.length - 1; m >= 0; m--) { var pBullet = playerBullets[m]; for (var n = spaceships.length - 1; n >= 0; n--) { var ship = spaceships[n]; if (pBullet.intersects(ship)) { LK.setScore(LK.getScore() + 100); updateScore(); LK.getSound('enemyDestroy').play(); // Spawn 3 enemy bullets when spaceship explodes for (var explosionBullet = 0; explosionBullet < 3; explosionBullet++) { var bullet = new EnemyBullet(); bullet.x = ship.x; bullet.y = ship.y; // Spread bullets in different directions var angle = (explosionBullet * 60 - 60) * Math.PI / 180; // -60, 0, 60 degrees var bulletSpeed = 4; bullet.setVelocity(Math.sin(angle) * bulletSpeed, Math.cos(angle) * bulletSpeed); enemyBullets.push(bullet); game.addChild(bullet); } // Create explosion effect tween(ship, { scaleX: 2, scaleY: 2, alpha: 0, tint: 0xff4400 }, { duration: 500, easing: tween.easeOut, onFinish: function onFinish() { ship.destroy(); } }); pBullet.destroy(); playerBullets.splice(m, 1); spaceships.splice(n, 1); break; } } } // Collision detection - Player bullets vs Small UFOs for (var su2 = playerBullets.length - 1; su2 >= 0; su2--) { var pBullet4 = playerBullets[su2]; for (var su3 = smallUfos.length - 1; su3 >= 0; su3--) { var smallUfo2 = smallUfos[su3]; if (pBullet4.intersects(smallUfo2)) { LK.setScore(LK.getScore() + 75); updateScore(); LK.getSound('enemyDestroy').play(); // Create explosion effect tween(smallUfo2, { scaleX: 0.6, scaleY: 0.6, alpha: 0, tint: 0xff4400 }, { duration: 400, easing: tween.easeOut, onFinish: function onFinish() { smallUfo2.destroy(); } }); pBullet4.destroy(); playerBullets.splice(su2, 1); smallUfos.splice(su3, 1); break; } } } // Collision detection - Player bullets vs UFOs - single UFO for (var t = playerBullets.length - 1; t >= 0; t--) { var pBullet3 = playerBullets[t]; if (ufos.length > 0) { var ufo2 = ufos[0]; if (pBullet3.intersects(ufo2)) { var hitResult = ufo2.hit(); if (hitResult === 'destroy') { // UFO dies - give big score and level up LK.setScore(LK.getScore() + 1000); updateScore(); enemiesKilledThisLevel++; checkLevelProgression(); LK.getSound('enemyDestroy').play(); // Create explosion effect tween(ufo2, { scaleX: 3, scaleY: 3, alpha: 0, tint: 0xff4400 }, { duration: 1000, easing: tween.easeOut, onFinish: function onFinish() { ufo2.destroy(); clearAllEnemiesAndStartNewLevel(); } }); ufos.splice(0, 1); hasActiveUFO = false; } else { LK.setScore(LK.getScore() + 10); updateScore(); LK.getSound('enemyDestroy').play(); } // Create hit effect tween(ufo2, { tint: 0xff0066 }, { duration: 200, easing: tween.easeOut, onFinish: function onFinish() { ufo2.tint = 0xffffff; } }); pBullet3.destroy(); playerBullets.splice(t, 1); break; } } } // Collision detection - Enemy bullets vs Player for (var q = enemyBullets.length - 1; q >= 0; q--) { var eBullet = enemyBullets[q]; if (eBullet.intersects(player)) { playerLives--; updateLives(); eBullet.destroy(); enemyBullets.splice(q, 1); LK.effects.flashScreen(0xff0000, 1000); if (playerLives <= 0) { LK.showGameOver(); return; } break; } } // Collision detection - Spaceships vs Player for (var s = spaceships.length - 1; s >= 0; s--) { var ship2 = spaceships[s]; if (ship2.intersects(player)) { playerLives--; updateLives(); ship2.destroy(); spaceships.splice(s, 1); LK.effects.flashScreen(0xff0000, 1000); if (playerLives <= 0) { LK.showGameOver(); return; } break; } } // Collision detection - Small UFOs vs Player for (var su4 = smallUfos.length - 1; su4 >= 0; su4--) { var smallUfo3 = smallUfos[su4]; if (smallUfo3.intersects(player)) { playerLives--; updateLives(); smallUfo3.destroy(); smallUfos.splice(su4, 1); LK.effects.flashScreen(0xff0000, 1000); if (playerLives <= 0) { LK.showGameOver(); return; } break; } } // Collision detection - Player bullets vs Enemy bullets for (var pb = playerBullets.length - 1; pb >= 0; pb--) { var playerBullet = playerBullets[pb]; for (var eb = enemyBullets.length - 1; eb >= 0; eb--) { var enemyBullet = enemyBullets[eb]; if (playerBullet.intersects(enemyBullet)) { // Destroy both bullets playerBullet.destroy(); enemyBullet.destroy(); playerBullets.splice(pb, 1); enemyBullets.splice(eb, 1); break; } } } // Collision detection - UFOs vs Player - single UFO if (ufos.length > 0) { var ufo3 = ufos[0]; if (ufo3.intersects(player)) { playerLives--; updateLives(); ufo3.destroy(); ufos.splice(0, 1); hasActiveUFO = false; LK.effects.flashScreen(0xff0000, 1000); if (playerLives <= 0) { LK.showGameOver(); return; } } } }; LK.playMusic('battleMusic');