/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); var storage = LK.import("@upit/storage.v1"); /**** * Classes ****/ var Alien = Container.expand(function () { var self = Container.call(this); var alienGraphics = self.attachAsset('alien', { anchorX: 0.5, anchorY: 0.5 }); self.active = true; self.width = alienGraphics.width; self.height = alienGraphics.height; self.value = 10; // Point value self.canShoot = false; self.hit = function () { if (!self.active) { return false; } self.active = false; // Create explosion effect var explosion = LK.getAsset('alienExplosion', { anchorX: 0.5, anchorY: 0.5, x: self.x, y: self.y }); game.addChild(explosion); tween(explosion, { alpha: 0 }, { duration: 500, easing: tween.easeOut, onFinish: function onFinish() { explosion.destroy(); } }); tween(self, { alpha: 0 }, { duration: 300, easing: tween.easeOut, onFinish: function onFinish() { self.destroy(); } }); LK.getSound('explosion').play(); LK.setScore(LK.getScore() + self.value); // Chance to drop a power-up if (Math.random() < 0.15) { createPowerUp(self.x, self.y); } return true; }; self.update = function () { // Maybe shoot if this alien can shoot if (self.active && self.canShoot && Math.random() < 0.005) { var laser = new AlienLaser(); laser.x = self.x; laser.y = self.y + self.height / 2; game.addChild(laser); alienLasers.push(laser); LK.getSound('laser').play(); } }; return self; }); var AlienLaser = Container.expand(function () { var self = Container.call(this); var laserGraphics = self.attachAsset('alienlaser', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 10; self.width = laserGraphics.width; self.height = laserGraphics.height; self.update = function () { self.y += self.speed; // Destroy if off screen if (self.y > 2732 + self.height) { self.destroy(); var index = alienLasers.indexOf(self); if (index > -1) { alienLasers.splice(index, 1); } } }; return self; }); var Ball = Container.expand(function () { var self = Container.call(this); var ballGraphics = self.attachAsset('ball', { anchorX: 0.5, anchorY: 0.5 }); self.speedX = 12; self.speedY = -12; self.radius = ballGraphics.width / 2; self.active = false; self.superBall = false; self.reset = function () { self.x = 2048 / 2; self.y = 2732 - 200; self.active = false; self.superBall = false; ballGraphics.tint = 0xffffff; }; self.launch = function () { if (!self.active) { self.active = true; // Random initial horizontal direction if (Math.random() > 0.5) { self.speedX = -Math.abs(self.speedX); } else { self.speedX = Math.abs(self.speedX); } // Always launch upward self.speedY = -Math.abs(self.speedY); } }; self.activatePowerUp = function (type) { if (type === 'super') { self.superBall = true; ballGraphics.tint = 0xff5500; // Reset after 10 seconds LK.setTimeout(function () { if (self.superBall) { self.superBall = false; ballGraphics.tint = 0xffffff; } }, 10000); } else if (type === 'speed') { self.speedX = self.speedX * 1.5; self.speedY = self.speedY * 1.5; // Reset after 7 seconds LK.setTimeout(function () { self.speedX = self.speedX / 1.5; self.speedY = self.speedY / 1.5; }, 7000); } }; self.update = function () { if (!self.active) { return; } // Move the ball self.x += self.speedX; self.y += self.speedY; // Bounce off walls if (self.x < self.radius) { self.x = self.radius; self.speedX = Math.abs(self.speedX); LK.getSound('bounce').play(); } else if (self.x > 2048 - self.radius) { self.x = 2048 - self.radius; self.speedX = -Math.abs(self.speedX); LK.getSound('bounce').play(); } // Bounce off ceiling if (self.y < self.radius) { self.y = self.radius; self.speedY = Math.abs(self.speedY); LK.getSound('bounce').play(); } // Ball fell off screen if (self.y > 2732 + self.radius) { lives--; updateLivesDisplay(); if (lives <= 0) { LK.showGameOver(); } else { self.reset(); } } }; return self; }); var Paddle = Container.expand(function () { var self = Container.call(this); var paddleGraphics = self.attachAsset('paddle', { anchorX: 0.5, anchorY: 0.5 }); self.width = paddleGraphics.width; self.height = paddleGraphics.height; self.speed = 20; self.powerUpActive = false; self.activatePowerUp = function (type) { self.powerUpActive = true; if (type === 'wide') { // Make paddle wider tween(paddleGraphics, { width: self.width * 1.5 }, { duration: 500, easing: tween.easeOut }); // Reset after 10 seconds LK.setTimeout(function () { if (self.powerUpActive) { tween(paddleGraphics, { width: self.width }, { duration: 500, easing: tween.easeIn }); self.powerUpActive = false; } }, 10000); } }; self.down = function (x, y, obj) { draggedObject = self; }; return self; }); var PowerUp = Container.expand(function () { var self = Container.call(this); var types = ['wide', 'super', 'speed']; self.type = types[Math.floor(Math.random() * types.length)]; var color = 0xf1c40f; // Default yellow if (self.type === 'wide') { color = 0x3498db; } // Blue if (self.type === 'super') { color = 0xff5500; } // Orange if (self.type === 'speed') { color = 0xe74c3c; } // Red var powerUpGraphics = self.attachAsset('powerUp', { anchorX: 0.5, anchorY: 0.5, tint: color }); self.speed = 4; self.width = powerUpGraphics.width; self.height = powerUpGraphics.height; self.update = function () { self.y += self.speed; // Destroy if off screen if (self.y > 2732 + self.height) { self.destroy(); var index = powerUps.indexOf(self); if (index > -1) { powerUps.splice(index, 1); } } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000033 // Dark blue space background }); /**** * Game Code ****/ // Game state variables var paddle; var ball; var aliens = []; var alienLasers = []; var powerUps = []; var draggedObject = null; var currentWave = 1; var lives = 1; var gameStarted = false; var alienDirection = 1; // 1 = right, -1 = left var alienSpeed = 1; var alienMoveDownTimer; var alienShootingTimer; var lastActiveAlienIndex = -1; // GUI elements var scoreTxt; var livesTxt; var waveTxt; var instructionsTxt; // Initialize game elements function initGame() { // Attach background var background = LK.getAsset('background', { anchorX: 0.5, anchorY: 0.5, x: 2048 / 2, y: 2732 / 2 }); game.addChild(background); // Create paddle paddle = new Paddle(); paddle.x = 2048 / 2; paddle.y = 2732 - 100; game.addChild(paddle); // Create ball ball = new Ball(); ball.reset(); game.addChild(ball); // Create score display scoreTxt = new Text2('Score: 0', { size: 60, fill: 0xFFFFFF }); scoreTxt.anchor.set(0, 0); LK.gui.topRight.addChild(scoreTxt); // Create lives display livesTxt = new Text2('Lives: ' + lives, { size: 60, fill: 0xFFFFFF }); livesTxt.anchor.set(0, 0); LK.gui.topLeft.addChild(livesTxt); // Position livesTxt a bit to the right to avoid the platform level menu icon livesTxt.x = 120; // Create wave display waveTxt = new Text2('Wave: ' + currentWave, { size: 60, fill: 0xFFFFFF }); waveTxt.anchor.set(0.5, 0); LK.gui.top.addChild(waveTxt); // Create instruction text instructionsTxt = new Text2('Tap to Start\nDrag paddle to move', { size: 80, fill: 0xFFFFFF }); instructionsTxt.anchor.set(0.5, 0.5); LK.gui.center.addChild(instructionsTxt); // Create aliens for first wave createWave(); // Start alien movement timer alienMoveDownTimer = LK.setInterval(moveAliensDown, 10000); // Play background music LK.playMusic('gamebgm', { fade: { start: 0, end: 0.5, duration: 1000 } }); } function createWave() { // Clear any remaining aliens from previous wave for (var i = aliens.length - 1; i >= 0; i--) { aliens[i].destroy(); } aliens = []; var rows = Math.min(3 + Math.floor(currentWave / 2), 6); var cols = Math.min(6 + Math.floor(currentWave / 3), 10); var startX = (2048 - cols * 120) / 2 + 60; var startY = 200; for (var row = 0; row < rows; row++) { for (var col = 0; col < cols; col++) { var alien = new Alien(); alien.x = startX + col * 120; alien.y = startY + row * 100; // Aliens in the bottom row can shoot alien.canShoot = row === rows - 1; // Higher row aliens are worth more points alien.value = 10 + (rows - row) * 5; game.addChild(alien); aliens.push(alien); } } // Update wave text waveTxt.setText('Wave: ' + currentWave); // Increase speed with each wave alienSpeed = 1 + currentWave * 0.3; } function moveAliensDown() { var moveDownAmount = 50; var reachedBottom = false; for (var i = 0; i < aliens.length; i++) { if (aliens[i] !== undefined && aliens[i].active) { aliens[i].y += moveDownAmount; // Check if aliens reached the bottom (player loses) if (aliens[i].y > paddle.y - 100) { reachedBottom = true; } // Reset which aliens can shoot (bottom row can shoot) aliens[i].canShoot = false; } } // Determine which aliens are in the bottom row (can shoot) updateShootingAliens(); if (reachedBottom) { LK.showGameOver(); } } function updateShootingAliens() { // Create a map to track the bottom-most alien in each column var columnMap = {}; for (var i = 0; i < aliens.length; i++) { if (aliens[i] !== undefined && aliens[i].active) { var col = Math.round(aliens[i].x / 120); if (!columnMap[col] || aliens[i].y > columnMap[col].y) { columnMap[col] = aliens[i]; } } } // Reset all shooting abilities for (var i = 0; i < aliens.length; i++) { if (aliens[i] !== undefined) { aliens[i].canShoot = false; } } // Enable shooting for bottom aliens for (var col in columnMap) { columnMap[col].canShoot = true; } } function updateLivesDisplay() { livesTxt.setText('Lives: ' + lives); } function createPowerUp(x, y) { var powerUp = new PowerUp(); powerUp.x = x; powerUp.y = y; game.addChild(powerUp); powerUps.push(powerUp); } function checkCollisions() { // Ball collision with paddle if (ball.active && ball.y + ball.radius >= paddle.y - paddle.height / 2 && ball.y - ball.radius <= paddle.y + paddle.height / 2 && ball.x + ball.radius >= paddle.x - paddle.width / 2 && ball.x - ball.radius <= paddle.x + paddle.width / 2) { // Bounce ball up ball.y = paddle.y - paddle.height / 2 - ball.radius; ball.speedY = -Math.abs(ball.speedY); // Adjust horizontal direction based on where ball hit paddle var hitPos = (ball.x - paddle.x) / (paddle.width / 2); ball.speedX = ball.speedX * 0.3 + hitPos * 8; LK.getSound('bounce').play(); } // Ball collision with aliens for (var i = aliens.length - 1; i >= 0; i--) { if (aliens[i] !== undefined && aliens[i].active && ball.active && ball.y + ball.radius >= aliens[i].y - aliens[i].height / 2 && ball.y - ball.radius <= aliens[i].y + aliens[i].height / 2 && ball.x + ball.radius >= aliens[i].x - aliens[i].width / 2 && ball.x - ball.radius <= aliens[i].x + aliens[i].width / 2) { // Destroy alien aliens[i].hit(); // Remove from array if destroyed if (!aliens[i].active) { aliens.splice(i, 1); } // If superball, don't bounce if (!ball.superBall) { // Determine bounce direction based on collision side if (aliens[i] !== undefined && aliens[i].active) { var dx = ball.x - aliens[i].x; var dy = ball.y - aliens[i].y; } if (Math.abs(dx) > Math.abs(dy)) { ball.speedX = dx > 0 ? Math.abs(ball.speedX) : -Math.abs(ball.speedX); } else { ball.speedY = dy > 0 ? Math.abs(ball.speedY) : -Math.abs(ball.speedY); } } // Update score text scoreTxt.setText('Score: ' + LK.getScore()); // Create new wave if all aliens destroyed if (aliens.length === 0) { currentWave++; createWave(); } } } // Paddle collision with powerups for (var i = powerUps.length - 1; i >= 0; i--) { if (powerUps[i].y + powerUps[i].height / 2 >= paddle.y - paddle.height / 2 && powerUps[i].y - powerUps[i].height / 2 <= paddle.y + paddle.height / 2 && powerUps[i].x + powerUps[i].width / 2 >= paddle.x - paddle.width / 2 && powerUps[i].x - powerUps[i].width / 2 <= paddle.x + paddle.width / 2) { // Activate power-up var type = powerUps[i].type; if (type === 'wide') { paddle.activatePowerUp(type); } else { ball.activatePowerUp(type); } // Play power-up sound LK.getSound('powerup').play(); // Remove power-up powerUps[i].destroy(); powerUps.splice(i, 1); } } // Paddle collision with alien lasers for (var i = alienLasers.length - 1; i >= 0; i--) { if (alienLasers[i].y + alienLasers[i].height / 2 >= paddle.y - paddle.height / 2 && alienLasers[i].y - alienLasers[i].height / 2 <= paddle.y + paddle.height / 2 && alienLasers[i].x + alienLasers[i].width / 2 >= paddle.x - paddle.width / 2 && alienLasers[i].x - alienLasers[i].width / 2 <= paddle.x + paddle.width / 2) { // Remove laser alienLasers[i].destroy(); alienLasers.splice(i, 1); // Lose a life lives--; updateLivesDisplay(); // Flash paddle to indicate hit LK.effects.flashObject(paddle, 0xff0000, 500); if (lives <= 0) { LK.showGameOver(); } } // Ball collision with alien lasers if (alienLasers[i] !== undefined && ball.active && ball.y + ball.radius >= alienLasers[i].y - alienLasers[i].height / 2 && ball.y - ball.radius <= alienLasers[i].y + alienLasers[i].height / 2 && ball.x + ball.radius >= alienLasers[i].x - alienLasers[i].width / 2 && ball.x - ball.radius <= alienLasers[i].x + alienLasers[i].width / 2) { // Destroy laser alienLasers[i].destroy(); alienLasers.splice(i, 1); // Play bounce sound LK.getSound('bounce').play(); } } } function updateAliens() { // Move aliens horizontally var reachedEdge = false; var allAliensX = aliens.map(function (alien) { return alien.active ? alien.x : null; }).filter(Boolean); if (allAliensX.length === 0) { return; } var leftmostAlien = Math.min.apply(null, allAliensX); var rightmostAlien = Math.max.apply(null, allAliensX); if (rightmostAlien + 30 >= 2048 && alienDirection > 0) { alienDirection = -1; reachedEdge = true; } else if (leftmostAlien - 30 <= 0 && alienDirection < 0) { alienDirection = 1; reachedEdge = true; } for (var i = 0; i < aliens.length; i++) { if (aliens[i] !== undefined && aliens[i].active) { aliens[i].x += alienDirection * alienSpeed; // If aliens reached edge, move them down a bit if (reachedEdge) { aliens[i].y += 20; // Check if aliens reached the bottom (player loses) if (aliens[i].y > paddle.y - 100) { LK.showGameOver(); } } } } // If aliens reached edge, update which aliens can shoot if (reachedEdge) { updateShootingAliens(); } } // Game event handlers game.down = function (x, y, obj) { if (!gameStarted) { gameStarted = true; instructionsTxt.visible = false; ball.launch(); } // Start dragging paddle draggedObject = paddle; draggedObject.x = x; }; game.move = function (x, y, obj) { if (draggedObject) { // Constrain paddle to screen bounds var halfWidth = draggedObject.width / 2; var targetX = Math.max(halfWidth, Math.min(2048 - halfWidth, x)); tween.stop(draggedObject, { x: true }); // Stop any ongoing tween on x tween(draggedObject, { x: targetX }, { duration: 200, // Adjusted duration for smoother movement easing: tween.easeInOut // Easing for smooth transition }); } }; game.up = function (x, y, obj) { draggedObject = null; }; // Main update loop game.update = function () { // Only update game elements if game has started if (gameStarted) { // Update aliens updateAliens(); // Check all collisions checkCollisions(); } // Update score display scoreTxt.setText('Score: ' + LK.getScore()); }; // Initialize the game initGame();