/**** * 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; }); // 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 = (5 + Math.random() * 3) * 0.5; // slightly faster zombies self.update = function () { // Move toward player if (typeof self.lastX === "undefined") self.lastX = self.x; if (typeof self.lastY === "undefined") self.lastY = self.y; if (player) { var dx = player.x - self.x; var dy = player.y - self.y; var len = Math.sqrt(dx * dx + dy * dy); if (len > 0) { self.x += dx / len * self.speed; self.y += dy / len * self.speed; } else { self.y += self.speed; } } else { self.y += self.speed; } // Update lastX/lastY for event triggers self.lastX = self.x; self.lastY = self.y; }; 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) * 0.4; // much faster than normal zombies, but slowed down self.update = function () { // Move toward player if (typeof self.lastX === "undefined") self.lastX = self.x; if (typeof self.lastY === "undefined") self.lastY = self.y; if (player) { var dx = player.x - self.x; var dy = player.y - self.y; var len = Math.sqrt(dx * dx + dy * dy); if (len > 0) { self.x += dx / len * self.speed; self.y += dy / len * self.speed; } else { self.y += self.speed; } } else { self.y += self.speed; } // Update lastX/lastY for event triggers self.lastX = self.x; self.lastY = self.y; }; 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 = 1; 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; }); /**** * 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 dragNode = null; var lastTouch = { x: 0, y: 0 }; var scoreTxt, livesTxt; var spawnTick = 0; var difficulty = 1; var gameOver = false; // 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('music'); // Create player player = new Player(); player.x = 2048 / 2; player.y = 2732 / 2; game.addChild(player); // 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(); // Randomly pick a spawn edge: 0=top, 1=bottom, 2=left, 3=right var edge = Math.floor(Math.random() * 4); if (edge === 0) { // top e.x = 200 + Math.random() * (2048 - 400); e.y = -100; } else if (edge === 1) { // bottom e.x = 200 + Math.random() * (2048 - 400); e.y = 2732 + 100; } else if (edge === 2) { // left e.x = -100; e.y = 200 + Math.random() * (2732 - 400); } else { // right e.x = 2048 + 100; e.y = 200 + Math.random() * (2732 - 400); } 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) { 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 // Only increase Powerup and FastZombie spawn rates, not enemy spawn rate var newDifficulty = 1 + Math.floor(LK.getScore() / 50) * 0.1; if (newDifficulty !== difficulty) { difficulty = newDifficulty; } // Enemy spawn rate stays constant, but we use difficulty for powerup and fastzombie rates // Player update player.update(); // Spawn logic spawnTick++; if (spawnTick % 30 === 0) { // Limit total number of enemies, fastzombies, and powerups to 10 var totalActive = enemies.length; var maxActive = 10; // Enemy spawn rate is constant, not affected by difficulty if (totalActive < maxActive && Math.random() < 0.5) { spawnEnemy(); totalActive++; } if (totalActive < maxActive && Math.random() < 0.10) { spawnEnemy(); totalActive++; } // FastZombie: 7% base chance, scales with difficulty, only after score >= 25 // After score > 50, FastZombie spawn chance is 50% var fastZombieChance = 0.07 * difficulty; if (LK.getScore() > 50) { fastZombieChance = 0.5; } if (totalActive < maxActive && LK.getScore() >= 25 && Math.random() < fastZombieChance) { var fz = new FastZombie(); // Randomly pick a spawn edge: 0=top, 1=bottom, 2=left, 3=right var edge = Math.floor(Math.random() * 4); if (edge === 0) { // top fz.x = 200 + Math.random() * (2048 - 400); fz.y = -100; } else if (edge === 1) { // bottom fz.x = 200 + Math.random() * (2048 - 400); fz.y = 2732 + 100; } else if (edge === 2) { // left fz.x = -100; fz.y = 200 + Math.random() * (2732 - 400); } else { // right fz.x = 2048 + 100; fz.y = 200 + Math.random() * (2732 - 400); } enemies.push(fz); game.addChild(fz); totalActive++; } } // 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()); if (LK.getScore() >= 150) { gameOver = true; LK.showYouWin(); return; } LK.getSound('enemyDown').play(); e.destroy(); enemies.splice(j, 1); b.destroy(); bullets.splice(i, 1); break; } } } // Enemies for (var i = enemies.length - 1; i >= 0; i--) { var e = enemies[i]; e.update(); 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 }; // Score display scoreTxt.setText(LK.getScore()); updateLives();