/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Enemy bullet var EnemyBullet = Container.expand(function () { var self = Container.call(this); var bullet = self.attachAsset('enemyBullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 18; self.update = function () { self.y += self.speed; }; return self; }); // Enemy ship var EnemyShip = Container.expand(function () { var self = Container.call(this); var ship = self.attachAsset('enemyShip', { anchorX: 0.5, anchorY: 0.5 }); self.width = ship.width; self.height = ship.height; self.speed = 6; self.shootCooldown = 0; self.update = function () { self.y += self.speed; if (self.shootCooldown > 0) { self.shootCooldown--; } }; return self; }); // Explosion effect (MVP: fade out and destroy) var Explosion = Container.expand(function () { var self = Container.call(this); var exp = self.attachAsset('explosion', { anchorX: 0.5, anchorY: 0.5 }); exp.alpha = 1; tween(exp, { alpha: 0 }, { duration: 400, easing: tween.linear, onFinish: function onFinish() { self.destroy(); } }); return self; }); // Player bullet var PlayerBullet = Container.expand(function () { var self = Container.call(this); var bullet = self.attachAsset('playerBullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = -28; self.update = function () { self.y += self.speed; }; return self; }); // Player ship var PlayerShip = Container.expand(function () { var self = Container.call(this); var ship = self.attachAsset('playerShip', { anchorX: 0.5, anchorY: 0.5 }); self.width = ship.width; self.height = ship.height; self.lives = 3; self.invincible = false; self.invincibleTicks = 0; self.update = function () { if (self.invincible) { self.invincibleTicks--; ship.alpha = self.invincibleTicks % 10 < 5 ? 0.4 : 1; if (self.invincibleTicks <= 0) { self.invincible = false; ship.alpha = 1; } } }; // Flash for damage self.flash = function () { LK.effects.flashObject(self, 0xffffff, 400); }; return self; }); // PowerUp class var PowerUp = Container.expand(function () { var self = Container.call(this); // Types: 'speed', 'double', 'invincible', 'rapid', 'shield', 'score' self.type = 'speed'; self.duration = 600; // 10 seconds at 60fps // Icon color by type var colorMap = { speed: 0x00ffff, "double": 0xffd700, invincible: 0xffffff, rapid: 0xff00ff, shield: 0x00ff00, score: 0xff6600 }; var icon = self.attachAsset('boosts', { anchorX: 0.5, anchorY: 0.5, scaleX: 3, scaleY: 3, color: colorMap[self.type] || 0xffffff }); self.width = icon.width; self.height = icon.height; self.speed = 8; self.setType = function (type) { self.type = type; icon.color = colorMap[type] || 0xffffff; }; self.update = function () { self.y += self.speed; }; return self; }); // Starfield background star var Star = Container.expand(function () { var self = Container.call(this); var star = self.attachAsset('star', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 0; self.update = function () { self.y += self.speed; if (self.y > 2732 + 10) { self.y = -10; self.x = 50 + Math.random() * (2048 - 100); self.speed = 2 + Math.random() * 4; } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000010 }); /**** * Game Code ****/ // Music (placeholder, not played in MVP) // Sounds // Explosion: green box (for MVP, will flash and fade) // Star: white ellipse // Enemy bullet: orange ellipse // Player bullet: yellow ellipse // Enemy ship: red box // Player ship: blue box // Starfield var stars = []; for (var i = 0; i < 60; i++) { var star = new Star(); star.x = 50 + Math.random() * (2048 - 100); star.y = Math.random() * 2732; star.speed = 2 + Math.random() * 4; stars.push(star); game.addChild(star); } // Player var player = new PlayerShip(); player.x = 2048 / 2; player.y = 2732 - 300; game.addChild(player); // Player bullets var playerBullets = []; // Enemies var enemies = []; var enemyBullets = []; // Explosions var explosions = []; // Power-ups var powerUp = null; var powerUpActive = false; var powerUpType = null; var powerUpTicks = 0; var powerUpIcon = null; var powerUpTimerTxt = null; var nextPowerUpTicks = 300; // 5s to 8s after last // Score and lives var score = 0; var scoreTxt = new Text2('0', { size: 120, fill: 0xFFFFFF }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); var livesTxt = new Text2('♥♥♥', { size: 90, fill: 0xFF6666 }); livesTxt.anchor.set(1, 0); LK.gui.topRight.addChild(livesTxt); // Power-up UI powerUpIcon = new Container(); var iconAsset = LK.getAsset('boosts-ui', { anchorX: 0.5, anchorY: 0, scaleX: 2, scaleY: 2, color: 0xffffff }); powerUpIcon.addChild(iconAsset); powerUpIcon.visible = false; powerUpIcon.x = 120; powerUpIcon.y = 20; LK.gui.top.addChild(powerUpIcon); powerUpTimerTxt = new Text2('', { size: 60, fill: 0xffffff }); powerUpTimerTxt.anchor.set(0, 0); powerUpTimerTxt.x = 60; powerUpTimerTxt.y = 0; powerUpIcon.addChild(powerUpTimerTxt); // Dragging var dragNode = null; // Enemy spawn control var enemySpawnTicks = 0; var enemySpawnInterval = 60; // ticks (1s) var enemySpeed = 6; var minEnemySpawnInterval = 24; // fastest spawn (0.4s) var maxEnemySpeed = 18; // Player shoot control var playerShootCooldown = 0; var playerShootInterval = 12; // ticks (0.2s) // Game state var gameOver = false; // Move handler function handleMove(x, y, obj) { if (dragNode && !gameOver) { // Clamp to game area (leave 60px margin) var halfW = player.width / 2; var halfH = player.height / 2; // Power-up: speed var speedMult = powerUpActive && powerUpType === 'speed' ? 2 : 1; // Move player faster if speed boost var px = player.x + (x - player.x) * 0.2 * speedMult; var py = player.y + (y - player.y) * 0.2 * speedMult; var nx = Math.max(halfW + 60, Math.min(2048 - halfW - 60, px)); var ny = Math.max(halfH + 120, Math.min(2732 - halfH - 60, py)); player.x = nx; player.y = ny; } } game.move = handleMove; game.down = function (x, y, obj) { if (!gameOver) { dragNode = player; handleMove(x, y, obj); } }; game.up = function (x, y, obj) { dragNode = null; }; // Update function game.update = function () { if (gameOver) { return; } // Update starfield for (var i = 0; i < stars.length; i++) { stars[i].update(); } // Update player player.update(); // Power-up spawn logic if (!powerUp && !powerUpActive) { nextPowerUpTicks--; if (nextPowerUpTicks <= 0) { powerUp = new PowerUp(); // Random type var types = ['speed', 'double', 'invincible', 'rapid', 'score']; var t = types[Math.floor(Math.random() * types.length)]; powerUp.setType(t); powerUp.x = 100 + Math.random() * (2048 - 200); powerUp.y = -60; game.addChild(powerUp); } } // Power-up update if (powerUp) { powerUp.update(); // Remove if off screen if (powerUp.y > 2732 + 60) { powerUp.destroy(); powerUp = null; nextPowerUpTicks = 300 + Math.floor(Math.random() * 180); // 5-8s } // Pickup if (powerUp && powerUp.intersects(player)) { // Activate effect powerUpActive = true; powerUpType = powerUp.type; powerUpTicks = 600; // 10s // UI powerUpIcon.visible = true; var colorMap = { speed: 0x00ffff, "double": 0xffd700, invincible: 0xffffff, rapid: 0xff00ff, shield: 0x00ff00, score: 0xff6600 }; powerUpIcon.children[0].color = colorMap[powerUpType] || 0xffffff; powerUpTimerTxt.setText('10.0'); // Sound/Effect LK.getSound('shoot').play(); // Remove from game powerUp.destroy(); powerUp = null; } } // Power-up effect timer if (powerUpActive) { powerUpTicks--; // UI update powerUpTimerTxt.setText((powerUpTicks / 60).toFixed(1)); if (powerUpTicks <= 0) { // Expire powerUpActive = false; powerUpType = null; powerUpIcon.visible = false; nextPowerUpTicks = 300 + Math.floor(Math.random() * 180); // Sound/Effect LK.getSound('explosion').play(); } } // Player shooting if (playerShootCooldown > 0) { playerShootCooldown--; } if (dragNode && playerShootCooldown <= 0) { // Power-up: double shot or rapid if (powerUpActive && powerUpType === 'double') { // Two bullets for (var i = -1; i <= 1; i += 2) { var pb = new PlayerBullet(); pb.x = player.x + i * 40; pb.y = player.y - player.height / 2 - 10; playerBullets.push(pb); game.addChild(pb); } } else { var pb = new PlayerBullet(); pb.x = player.x; pb.y = player.y - player.height / 2 - 10; playerBullets.push(pb); game.addChild(pb); } // Rapid fire if (powerUpActive && powerUpType === 'rapid') { playerShootCooldown = Math.floor(playerShootInterval / 2); } else { playerShootCooldown = playerShootInterval; } LK.getSound('shoot').play(); } // Update player bullets for (var i = playerBullets.length - 1; i >= 0; i--) { var b = playerBullets[i]; b.update(); // Remove if off screen if (b.y < -40) { b.destroy(); playerBullets.splice(i, 1); continue; } // Check collision with enemies for (var j = enemies.length - 1; j >= 0; j--) { var e = enemies[j]; if (b.intersects(e)) { // Explosion var exp = new Explosion(); exp.x = e.x; exp.y = e.y; explosions.push(exp); game.addChild(exp); LK.getSound('explosion').play(); // Remove enemy and bullet e.destroy(); enemies.splice(j, 1); b.destroy(); playerBullets.splice(i, 1); // Score score++; scoreTxt.setText(score); // Difficulty up if (score % 10 === 0 && enemySpawnInterval > minEnemySpawnInterval) { enemySpawnInterval -= 6; if (enemySpawnInterval < minEnemySpawnInterval) { enemySpawnInterval = minEnemySpawnInterval; } } if (score % 15 === 0 && enemySpeed < maxEnemySpeed) { enemySpeed += 2; if (enemySpeed > maxEnemySpeed) { enemySpeed = maxEnemySpeed; } } break; } } } // Spawn enemies enemySpawnTicks++; if (enemySpawnTicks >= enemySpawnInterval) { enemySpawnTicks = 0; var e = new EnemyShip(); e.x = 100 + Math.random() * (2048 - 200); e.y = -80; e.speed = enemySpeed; e.shootCooldown = 30 + Math.floor(Math.random() * 40); enemies.push(e); game.addChild(e); } // Update enemies for (var i = enemies.length - 1; i >= 0; i--) { var e = enemies[i]; e.update(); // Remove if off screen if (e.y > 2732 + 100) { e.destroy(); enemies.splice(i, 1); continue; } // Enemy shooting if (e.shootCooldown <= 0) { var eb = new EnemyBullet(); eb.x = e.x; eb.y = e.y + e.height / 2 + 10; enemyBullets.push(eb); game.addChild(eb); e.shootCooldown = 60 + Math.floor(Math.random() * 40); LK.getSound('enemyShoot').play(); } } // Update enemy bullets for (var i = enemyBullets.length - 1; i >= 0; i--) { var eb = enemyBullets[i]; eb.update(); // Remove if off screen if (eb.y > 2732 + 40) { eb.destroy(); enemyBullets.splice(i, 1); continue; } // Check collision with player if (!player.invincible && !(powerUpActive && powerUpType === 'invincible') && eb.intersects(player)) { eb.destroy(); enemyBullets.splice(i, 1); // Damage player player.lives--; player.invincible = true; player.invincibleTicks = 60; player.flash(); // Update lives display var livesStr = ''; for (var l = 0; l < player.lives; l++) { livesStr += '♥'; } livesTxt.setText(livesStr); // Explosion var exp = new Explosion(); exp.x = player.x; exp.y = player.y; explosions.push(exp); game.addChild(exp); LK.getSound('explosion').play(); // Game over if (player.lives <= 0) { gameOver = true; LK.effects.flashScreen(0xff0000, 1200); LK.showGameOver(); return; } } } // Update explosions (auto-destroyed by tween) // No need to update, but clean up destroyed ones for (var i = explosions.length - 1; i >= 0; i--) { if (explosions[i].destroyed) { explosions.splice(i, 1); } } }; // Play background music LK.playMusic('background_music2', { fade: { start: 0, end: 1, duration: 1000 } });