/**** * Classes ****/ // Bullet class var Bullet = Container.expand(function () { var self = Container.call(this); var bulletSprite = self.attachAsset('bullet', { anchorX: 0.5, anchorY: 0.5, flipY: 1 // flip vertically }); // Target coordinates for the bullet self.targetX = null; self.targetY = null; self.speed = 48; // pixels per frame, positive value self.dirX = 0; self.dirY = -1; self.setTarget = function (tx, ty) { // Calculate direction vector var dx = tx - self.x; var dy = ty - self.y; var len = Math.sqrt(dx * dx + dy * dy); if (len > 0) { self.dirX = dx / len; self.dirY = dy / len; } else { self.dirX = 0; self.dirY = -1; } self.targetX = tx; self.targetY = ty; }; self.update = function () { // Store lastX/lastY for event triggers if (typeof self.lastX === "undefined") self.lastX = self.x; if (typeof self.lastY === "undefined") self.lastY = self.y; // Move in direction self.x += self.dirX * self.speed; self.y += self.dirY * self.speed; // Rotate bullet sprite to face movement direction if (self.dirX !== 0 || self.dirY !== 0) { // atan2 returns angle in radians, 0 is to the right, so subtract Math.PI/2 to make 0 point up bulletSprite.rotation = Math.atan2(self.dirY, self.dirX) - Math.PI / 2; } // Update lastX/lastY for next frame self.lastX = self.x; self.lastY = self.y; }; return self; }); // Bulletpowerup class var Bulletpowerup = Container.expand(function () { var self = Container.call(this); var bpSprite = self.attachAsset('Bulletpowerup', { anchorX: 0.5, anchorY: 0.5 }); self.radius = bpSprite.width * 0.5; self.speed = 16 + Math.random() * 6; self.update = function () { self.y += self.speed; }; return self; }); // Enemy class var Enemy = Container.expand(function () { var self = Container.call(this); var enemySprite = self.attachAsset('enemy', { anchorX: 0.5, anchorY: 0.5 }); self.radius = enemySprite.width * 0.5; self.speed = 3 + Math.random() * 3; // much slower zombies self.update = function () { self.y += self.speed; // No horizontal movement, no bouncing, no direction change }; return self; }); // FastZombie class var FastZombie = Container.expand(function () { var self = Container.call(this); var fastZombieSprite = self.attachAsset('FastZombie', { anchorX: 0.5, anchorY: 0.5 }); self.radius = fastZombieSprite.width * 0.5; self.speed = 10 + Math.random() * 4; // much faster than normal zombies self.update = function () { self.y += self.speed; }; return self; }); // Obstacle class var Obstacle = Container.expand(function () { var self = Container.call(this); var obsSprite = self.attachAsset('obstacle', { anchorX: 0.5, anchorY: 0.5 }); self.width = obsSprite.width; self.height = obsSprite.height; self.speed = 12 + Math.random() * 8; self.update = function () { self.y += self.speed; }; return self; }); // Player class var Player = Container.expand(function () { var self = Container.call(this); var playerSprite = self.attachAsset('player', { anchorX: 0.5, anchorY: 0.5 }); self.radius = playerSprite.width * 0.5; self.lives = 3; self.invincible = false; self.invincibleTicks = 0; self.shootCooldown = 0; self.update = function () { if (self.invincible) { self.invincibleTicks--; if (self.invincibleTicks <= 0) { self.invincible = false; playerSprite.alpha = 1; } else { // Flicker effect playerSprite.alpha = LK.ticks % 10 < 5 ? 0.4 : 1; } } if (self.shootCooldown > 0) self.shootCooldown--; }; // Called when player is hit self.hit = function () { if (self.invincible) return; self.lives--; self.invincible = true; self.invincibleTicks = 90; // 1.5 seconds playerSprite.alpha = 0.4; LK.effects.flashObject(self, 0xff0000, 500); LK.getSound('hit').play(); }; // Called when player picks up a powerup self.powerup = function () { self.invincible = true; self.invincibleTicks = 180; // 3 seconds playerSprite.alpha = 0.4; LK.getSound('powerup').play(); }; return self; }); // Powerup class var Powerup = Container.expand(function () { var self = Container.call(this); var puSprite = self.attachAsset('powerup', { anchorX: 0.5, anchorY: 0.5 }); self.radius = puSprite.width * 0.5; self.speed = 10; // Add hit counter self.hits = 0; self.update = function () { self.y += self.speed; }; // Called when powerup is hit by bullet self.hit = function () { self.hits++; }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x181818 }); /**** * Game Code ****/ // Game state variables // Player character: blue box // Enemy: red ellipse // Obstacle: orange box // Bullet: yellow box // Powerup: green ellipse // Sound effects // Music var player; var bullets = []; var enemies = []; // Removed obstacles array as obstacles are deleted from the game var powerups = []; var bulletpowerups = []; var bulletpowerupActive = false; var bulletpowerupTimer = 0; var dragNode = null; var lastTouch = { x: 0, y: 0 }; var scoreTxt, livesTxt; var spawnTick = 0; var difficulty = 1; var gameOver = false; // Goal object at the bottom var goalObj = null; // UI scoreTxt = new Text2('0', { size: 120, fill: "#fff" }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); livesTxt = new Text2('♥♥♥', { size: 90, fill: 0xFF5252 }); livesTxt.anchor.set(1, 0); LK.gui.topRight.addChild(livesTxt); // Start music LK.playMusic('arcadebg'); // Create player player = new Player(); player.x = 2048 / 2; player.y = 2732 - 350; game.addChild(player); // Create goal object at the bottom center goalObj = LK.getAsset('obstacle', { anchorX: 0.5, anchorY: 0.5, x: 2048 / 2, y: 2732 - 100, scaleX: 1.2, scaleY: 1.2 }); game.addChild(goalObj); // Helper: update lives display function updateLives() { var s = ''; for (var i = 0; i < player.lives; i++) s += '♥'; livesTxt.setText(s); } // Helper: spawn enemy function spawnEnemy() { var e = new Enemy(); e.x = 200 + Math.random() * (2048 - 400); e.y = -100; enemies.push(e); game.addChild(e); } // Removed spawnObstacle function as obstacles are deleted from the game // Powerup spawn helper removed as per requirements // Touch controls: drag player game.down = function (x, y, obj) { // Don't allow drag from top left 100x100 if (x < 100 && y < 100) return; if (player && !gameOver) { dragNode = player; lastTouch.x = x; lastTouch.y = y; } }; game.move = function (x, y, obj) { if (dragNode && !gameOver) { // Player movement disabled: do not update player.x or player.y lastTouch.x = x; lastTouch.y = y; } }; game.up = function (x, y, obj) { dragNode = null; }; // Tap to shoot (anywhere except top left 100x100) game.on('down', function (x, y, obj) { if (x < 100 && y < 100) return; if (player && !gameOver && player.shootCooldown <= 0) { if (bulletpowerupActive) { // Shoot five bullets with slight angle spread var angle = Math.atan2(y - player.y, x - player.x); var spread = Math.PI / 16; // ~11.25 degrees for (var i = -2; i <= 2; i++) { var b = new Bullet(); b.x = player.x; b.y = player.y - player.radius - 20; // Calculate new target with spread var targetAngle = angle + i * spread; var dist = 1000; var tx = player.x + Math.cos(targetAngle) * dist; var ty = player.y + Math.sin(targetAngle) * dist; b.setTarget(tx, ty); bullets.push(b); game.addChild(b); } player.shootCooldown = 12; // 0.2s LK.getSound('shoot').play(); } else { var b = new Bullet(); b.x = player.x; b.y = player.y - player.radius - 20; b.setTarget(x, y); // Set bullet direction toward tap bullets.push(b); game.addChild(b); player.shootCooldown = 12; // 0.2s LK.getSound('shoot').play(); } } }); // Main game loop game.update = function () { if (gameOver) return; // Increase difficulty over time // Increase zombie spawn rate by 10% for every 50 points scored var newDifficulty = 1 + Math.floor(LK.getScore() / 50) * 0.1; if (newDifficulty !== difficulty) { difficulty = newDifficulty; } // Player update player.update(); // Spawn logic spawnTick++; if (spawnTick % 30 === 0) { // increased spawn rate, higher chance for more zombies if (Math.random() < 0.85 * difficulty) spawnEnemy(); if (Math.random() < 0.25 * difficulty) spawnEnemy(); // sometimes spawn a second zombie // FastZombie: 15% base chance, scales with difficulty, only after score >= 25 if (LK.getScore() >= 25 && Math.random() < 0.15 * difficulty) { var fz = new FastZombie(); fz.x = 200 + Math.random() * (2048 - 400); fz.y = -100; enemies.push(fz); game.addChild(fz); } } // Powerup spawn: 5% chance every spawn tick, but only after score >= 100 if (spawnTick % 40 === 0 && LK.getScore() >= 100) { if (Math.random() < 0.05) { var p = new Powerup(); p.x = 200 + Math.random() * (2048 - 400); p.y = -100; powerups.push(p); game.addChild(p); } // Bulletpowerup spawn: 1% chance every spawn tick, at any score if (Math.random() < 0.01) { var bp = new Bulletpowerup(); bp.x = 200 + Math.random() * (2048 - 400); bp.y = -100; bulletpowerups.push(bp); game.addChild(bp); } } // Bulletpowerup timer logic // bulletpowerupActive is now permanent once collected; timer logic removed // Bullets for (var i = bullets.length - 1; i >= 0; i--) { var b = bullets[i]; b.update(); if (b.y < -60) { b.destroy(); bullets.splice(i, 1); continue; } // Bullet hits enemy for (var j = enemies.length - 1; j >= 0; j--) { var e = enemies[j]; if (b.intersects(e)) { LK.setScore(LK.getScore() + 1); scoreTxt.setText(LK.getScore()); LK.getSound('enemyDown').play(); e.destroy(); enemies.splice(j, 1); b.destroy(); bullets.splice(i, 1); break; } } // Bullet hits powerup for (var k = powerups.length - 1; k >= 0; k--) { var p = powerups[k]; if (b.intersects(p)) { if (typeof p.hits === "undefined") p.hits = 0; if (typeof p.hit === "function") p.hit(); // Add 3 points to score when powerup is hit by bullet LK.setScore(LK.getScore() + 3); scoreTxt.setText(LK.getScore()); if (p.hits >= 5) { p.destroy(); powerups.splice(k, 1); } b.destroy(); bullets.splice(i, 1); break; } } } // Enemies for (var i = enemies.length - 1; i >= 0; i--) { var e = enemies[i]; e.update(); // Enemy reaches goal object if (goalObj && e.intersects(goalObj)) { if (!player.invincible) { player.hit(); updateLives(); if (player.lives <= 0) { gameOver = true; LK.effects.flashScreen(0xff0000, 1000); LK.showGameOver(); return; } } e.destroy(); enemies.splice(i, 1); continue; } if (e.y > 2732 + 100) { e.destroy(); enemies.splice(i, 1); continue; } // Enemy hits player if (e.intersects(player)) { if (!player.invincible) { player.hit(); updateLives(); if (player.lives <= 0) { gameOver = true; LK.effects.flashScreen(0xff0000, 1000); LK.showGameOver(); return; } } e.destroy(); enemies.splice(i, 1); } } // Obstacles removed from game // Powerups for (var i = powerups.length - 1; i >= 0; i--) { var p = powerups[i]; p.update(); // Remove if off screen if (p.y > 2732 + 100) { p.destroy(); powerups.splice(i, 1); continue; } // Powerup hits player: remove life if (p.intersects(player)) { if (!player.invincible) { player.hit(); updateLives(); if (player.lives <= 0) { gameOver = true; LK.effects.flashScreen(0xff0000, 1000); LK.showGameOver(); return; } } LK.getSound('powerup').play(); p.destroy(); powerups.splice(i, 1); continue; } // Powerup hits obstacle: remove life if (p.intersects(goalObj)) { if (!player.invincible) { player.hit(); updateLives(); if (player.lives <= 0) { gameOver = true; LK.effects.flashScreen(0xff0000, 1000); LK.showGameOver(); return; } } LK.getSound('powerup').play(); p.destroy(); powerups.splice(i, 1); continue; } } // Bulletpowerups for (var i = bulletpowerups.length - 1; i >= 0; i--) { var bp = bulletpowerups[i]; bp.update(); // Remove if off screen if (bp.y > 2732 + 100) { bp.destroy(); bulletpowerups.splice(i, 1); continue; } // Handle collision with player if (bp.intersects(player)) { bulletpowerupActive = true; LK.getSound('powerup').play(); bp.destroy(); bulletpowerups.splice(i, 1); continue; } } }; // Score display scoreTxt.setText(LK.getScore()); updateLives();