/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Enemy class var Enemy = Container.expand(function () { var self = Container.call(this); var enemySprite = self.attachAsset('enemy', { anchorX: 0.5, anchorY: 0.5 }); self.width = enemySprite.width; self.height = enemySprite.height; self.speed = 6 + Math.random() * 3; self.shootTimer = 60 + Math.floor(Math.random() * 60); self.hp = 1; // Update self.update = function () { self.y += self.speed; self.shootTimer--; if (self.shootTimer <= 0) { self.shoot(); self.shootTimer = 90 + Math.floor(Math.random() * 60); } }; // Shoot self.shoot = function () { var bullet = new EnemyBullet(); bullet.x = self.x; bullet.y = self.y + self.height / 2 + bullet.height / 2; enemyBullets.push(bullet); game.addChild(bullet); }; return self; }); // Enemy2 class (stronger enemy) var Enemy2 = Container.expand(function () { var self = Container.call(this); var enemySprite = self.attachAsset('enemy2', { anchorX: 0.5, anchorY: 0.5 }); self.width = enemySprite.width; self.height = enemySprite.height; self.speed = 7 + Math.random() * 2; // Slightly faster than normal enemy self.shootTimer = 60 + Math.floor(Math.random() * 60); self.hp = 2; // 2 armor // Update self.update = function () { self.y += self.speed; self.shootTimer--; if (self.shootTimer <= 0) { self.shoot(); self.shootTimer = 90 + Math.floor(Math.random() * 60); } }; // Shoot self.shoot = function () { var bullet = new EnemyBullet(); bullet.x = self.x; bullet.y = self.y + self.height / 2 + bullet.height / 2; enemyBullets.push(bullet); game.addChild(bullet); }; return self; }); // Enemy bullet class var EnemyBullet = Container.expand(function () { var self = Container.call(this); var bulletSprite = self.attachAsset('enemyBullet', { anchorX: 0.5, anchorY: 0.5 }); self.width = bulletSprite.width; self.height = bulletSprite.height; self.speed = 18; self.update = function () { self.y += self.speed; }; return self; }); // Hero class var Hero = Container.expand(function () { var self = Container.call(this); var heroSprite = self.attachAsset('hero', { anchorX: 0.5, anchorY: 0.5 }); self.width = heroSprite.width; self.height = heroSprite.height; // Attach gun asset to hero's hand, but anchor at the bottom center for upward rotation var gunSprite = self.attachAsset('heroGun', { anchorX: 0.5, anchorY: 1.0 // Anchor at the very bottom of the gun for correct rotation }); // Raise the gun: rotate upwards and move to hero's hand gunSprite.x = 0; gunSprite.y = -heroSprite.height * 0.45; // Move gun above hero's hand gunSprite.rotation = -Math.PI / 2; // Point gun straight up (90 degrees) self.gunSprite = gunSprite; self.shootCooldown = 0; self.poweredUp = false; self.powerupTimer = 0; self.rapidFire = false; self.rapidFireTimer = 0; self.tripleShot = false; self.tripleShotTimer = 0; // Shoot method self.shoot = function () { if (self.shootCooldown > 0) return; if (self.tripleShot) { // Triple shot: three bullets, center, left, right var offset = 50; var bulletCenter = new HeroBullet(); bulletCenter.x = self.x; bulletCenter.y = self.y - self.height / 2 - bulletCenter.height / 2; heroBullets.push(bulletCenter); game.addChild(bulletCenter); var bulletLeft = new HeroBullet(); bulletLeft.x = self.x - offset; bulletLeft.y = self.y - self.height / 2 - bulletLeft.height / 2; heroBullets.push(bulletLeft); game.addChild(bulletLeft); var bulletRight = new HeroBullet(); bulletRight.x = self.x + offset; bulletRight.y = self.y - self.height / 2 - bulletRight.height / 2; heroBullets.push(bulletRight); game.addChild(bulletRight); LK.getSound('shoot').play(); self.shootCooldown = 6; // Fastest shooting for triple shot } else if (self.poweredUp) { // Twin shot: two bullets, left and right var offset = 40; var bulletLeft = new TwinHeroBullet(); bulletLeft.x = self.x - offset; bulletLeft.y = self.y - self.height / 2 - bulletLeft.height / 2; bulletLeft.offsetX = -offset; heroBullets.push(bulletLeft); game.addChild(bulletLeft); var bulletRight = new TwinHeroBullet(); bulletRight.x = self.x + offset; bulletRight.y = self.y - self.height / 2 - bulletRight.height / 2; bulletRight.offsetX = offset; heroBullets.push(bulletRight); game.addChild(bulletRight); LK.getSound('shoot').play(); self.shootCooldown = 10; // Faster shooting if powered up } else { var bullet = new HeroBullet(); bullet.x = self.x; bullet.y = self.y - self.height / 2 - bullet.height / 2; heroBullets.push(bullet); game.addChild(bullet); LK.getSound('shoot').play(); self.shootCooldown = 20; } }; // Powerup method self.activatePowerup = function () { self.poweredUp = true; self.powerupTimer = 300; // 5 seconds at 60fps tween(self, { scaleX: 1.3, scaleY: 1.3 }, { duration: 200, easing: tween.elasticOut }); }; // Remove powerup self.deactivatePowerup = function () { self.poweredUp = false; tween(self, { scaleX: 1, scaleY: 1 }, { duration: 200, easing: tween.elasticIn }); }; // Update self.update = function () { if (self.shootCooldown > 0) self.shootCooldown--; if (self.rapidFire) { self.rapidFireTimer--; if (self.rapidFireTimer <= 0) { self.rapidFire = false; tween(self, { scaleX: 1, scaleY: 1 }, { duration: 200, easing: tween.elasticIn }); } } if (self.tripleShot) { self.tripleShotTimer--; if (self.tripleShotTimer <= 0) { self.tripleShot = false; tween(self, { scaleX: 1, scaleY: 1 }, { duration: 200, easing: tween.elasticIn }); } } if (self.poweredUp) { self.powerupTimer--; if (self.powerupTimer <= 0) { self.deactivatePowerup(); } } }; return self; }); // Hero bullet class var HeroBullet = Container.expand(function () { var self = Container.call(this); var bulletSprite = self.attachAsset('heroBullet', { anchorX: 0.5, anchorY: 0.5 }); self.width = bulletSprite.width; self.height = bulletSprite.height; self.speed = -28; self.update = function () { self.y += self.speed; }; return self; }); // Powerup class var Powerup = Container.expand(function () { var self = Container.call(this); var powerupSprite = self.attachAsset('powerup', { anchorX: 0.5, anchorY: 0.5 }); self.width = powerupSprite.width; self.height = powerupSprite.height; self.speed = 10; self.update = function () { self.y += self.speed; }; return self; }); // Twin hero bullet class (for 2-bullet powerup) var TwinHeroBullet = Container.expand(function () { var self = Container.call(this); var bulletSprite = self.attachAsset('heroBullet', { anchorX: 0.5, anchorY: 0.5 }); self.width = bulletSprite.width; self.height = bulletSprite.height; self.speed = -28; self.offsetX = 0; // will be set on creation self.update = function () { self.y += self.speed; }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x222a36 }); /**** * Game Code ****/ // Music // Sound effects // Powerup: green ellipse // Hero bullet: yellow box // Enemy bullet: orange box // Enemy asset: red ellipse // Hero asset: blue box // Play music LK.playMusic('battlefieldMusic'); // Score var score = 0; var scoreTxt = new Text2('0', { size: 120, fill: "#fff" }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Hero lives var heroLives = 5; var livesTxt = new Text2("♥ x" + heroLives, { size: 110, fill: 0xFF4444, font: "Impact, Arial Black, Tahoma" }); livesTxt.anchor.set(1, 0); livesTxt.x = LK.gui.width - 40; livesTxt.y = 0; LK.gui.top.addChild(livesTxt); // Armor display var armorTxt = new Text2("", { size: 90, fill: 0x66ccff, font: "Impact, Arial Black, Tahoma" }); armorTxt.anchor.set(1, 0); armorTxt.x = LK.gui.width - 40; armorTxt.y = 120; LK.gui.top.addChild(armorTxt); // Hero instance var hero = new Hero(); hero.armor = 5; // Start with 5 armor game.addChild(hero); hero.x = 2048 / 2; hero.y = 2732 - 350; // Arrays for game objects var enemies = []; var heroBullets = []; var enemyBullets = []; var powerups = []; // Dragging var dragNode = null; // Difficulty var spawnTimer = 0; var spawnInterval = 60; var difficultyTimer = 0; // Track enemy spawn multiplier for score-based scaling var enemySpawnMultiplier = 1; var lastScoreForSpawnIncrease = 0; // Powerup spawn var powerupTimer = 600; // Move handler function handleMove(x, y, obj) { if (dragNode) { // Clamp hero inside game area, avoid top 100px and bottom 100px var minX = hero.width / 2; var maxX = 2048 - hero.width / 2; var minY = 100 + hero.height / 2; var maxY = 2732 - hero.height / 2 - 100; hero.x = Math.max(minX, Math.min(maxX, x)); hero.y = Math.max(minY, Math.min(maxY, y)); } } game.move = handleMove; game.down = function (x, y, obj) { // Only start drag if touch is on hero var dx = x - hero.x; var dy = y - hero.y; if (dx * dx + dy * dy < hero.width / 2 * (hero.width / 2)) { dragNode = hero; handleMove(x, y, obj); } }; game.up = function (x, y, obj) { dragNode = null; }; // Main update loop game.update = function () { // Hero update hero.update(); // Hero auto-shoot if (hero.tripleShot) { if (LK.ticks % 2 === 0) { hero.shoot(); } } else if (hero.rapidFire) { if (LK.ticks % 3 === 0) { hero.shoot(); } } else if (hero.poweredUp) { if (LK.ticks % 6 === 0) { hero.shoot(); } } else { if (LK.ticks % 12 === 0) { hero.shoot(); } } // Increase enemy spawn multiplier every 150 points by 3% if (score - lastScoreForSpawnIncrease >= 150) { var increases = Math.floor((score - lastScoreForSpawnIncrease) / 150); for (var inc = 0; inc < increases; inc++) { enemySpawnMultiplier *= 1.03; } lastScoreForSpawnIncrease += 150 * increases; } // Spawn enemies spawnTimer--; if (spawnTimer <= 0) { var margin = 120; var enemiesToSpawn = Math.max(1, Math.floor(enemySpawnMultiplier)); for (var s = 0; s < enemiesToSpawn; s++) { var enemy; // Spawn Enemy2 every 20 points (but not at score 0) if (score > 0 && score % 20 === 0 && s === 0) { enemy = new Enemy2(); } else { enemy = new Enemy(); } enemy.x = margin + Math.random() * (2048 - 2 * margin); enemy.y = -enemy.height / 2; enemies.push(enemy); game.addChild(enemy); } spawnTimer = spawnInterval; } // Increase difficulty over time difficultyTimer++; if (difficultyTimer % 600 === 0 && spawnInterval > 20) { spawnInterval -= 5; } // Powerup spawn powerupTimer--; if (powerupTimer <= 0) { // 20% chance to spawn powerup3 (kill all enemies), 30% for powerup2 (armor), else normal powerup var rand = Math.random(); var powerup; if (rand < 0.2) { powerup = new Powerup(); powerup.assetId = 'powerup3'; // Change sprite to powerup3 asset if (powerup.children && powerup.children.length > 0) { powerup.removeChild(powerup.children[0]); } var sprite = powerup.attachAsset('powerup3', { anchorX: 0.5, anchorY: 0.5 }); powerup.width = sprite.width; powerup.height = sprite.height; } else if (rand < 0.5) { powerup = new Powerup(); powerup.assetId = 'powerup2'; // Change sprite to powerup2 asset if (powerup.children && powerup.children.length > 0) { powerup.removeChild(powerup.children[0]); } var sprite = powerup.attachAsset('powerup2', { anchorX: 0.5, anchorY: 0.5 }); powerup.width = sprite.width; powerup.height = sprite.height; } else { powerup = new Powerup(); powerup.assetId = 'powerup'; } powerup.x = 200 + Math.random() * (2048 - 400); powerup.y = -powerup.height / 2; powerups.push(powerup); game.addChild(powerup); powerupTimer = 810 + Math.floor(Math.random() * 540); } // Update and cleanup hero bullets for (var i = heroBullets.length - 1; i >= 0; i--) { var b = heroBullets[i]; b.update(); if (b.y < -b.height / 2) { b.destroy(); heroBullets.splice(i, 1); continue; } // Collision with enemies for (var j = enemies.length - 1; j >= 0; j--) { var e = enemies[j]; if (b.intersects(e)) { e.hp--; if (e.hp <= 0) { LK.getSound('enemyDown').play(); score += 10; scoreTxt.setText(score); // Restore 1 life every 50 points, but only on the exact frame score crosses a multiple of 50 if (score % 50 === 0 && heroLives < 5) { heroLives++; livesTxt.setText("♥ x" + heroLives); // Optional: flash green to indicate heal LK.effects.flashScreen(0x44de83, 400); } // 30% chance to drop a life if not at max if (heroLives < 5 && Math.random() < 0.3) { heroLives++; livesTxt.setText("♥ x" + heroLives); LK.effects.flashScreen(0x44de83, 400); } // 30% chance to gain armor if killed enemy is Enemy2 (purple) if (e instanceof Enemy2 && Math.random() < 0.3) { if (typeof hero.armor === "undefined") hero.armor = 0; hero.armor++; // Optional: flash blue to indicate armor gain LK.effects.flashScreen(0x66ccff, 300); } e.destroy(); enemies.splice(j, 1); } b.destroy(); heroBullets.splice(i, 1); break; } } } // Update and cleanup enemy bullets for (var i = enemyBullets.length - 1; i >= 0; i--) { var eb = enemyBullets[i]; eb.update(); if (eb.y > 2732 + eb.height / 2) { eb.destroy(); enemyBullets.splice(i, 1); continue; } // Collision with hero if (eb.intersects(hero)) { LK.effects.flashScreen(0xff0000, 800); // If hero has armor, consume armor instead of life if (typeof hero.armor !== "undefined" && hero.armor > 0) { hero.armor--; // Optional: flash blue to indicate armor loss LK.effects.flashScreen(0x66ccff, 200); } else { heroLives--; livesTxt.setText("♥ x" + heroLives); if (heroLives <= 0) { LK.showGameOver(); return; } } eb.destroy(); enemyBullets.splice(i, 1); continue; } } // Update and cleanup enemies for (var i = enemies.length - 1; i >= 0; i--) { var e = enemies[i]; e.update(); if (e.y > 2732 + e.height / 2) { e.destroy(); enemies.splice(i, 1); continue; } // Collision with hero if (e.intersects(hero)) { LK.effects.flashScreen(0xff0000, 800); // If hero has armor, consume armor instead of life if (typeof hero.armor !== "undefined" && hero.armor > 0) { hero.armor--; // Optional: flash blue to indicate armor loss LK.effects.flashScreen(0x66ccff, 200); } else { heroLives--; livesTxt.setText("♥ x" + heroLives); if (heroLives <= 0) { LK.showGameOver(); return; } } e.destroy(); enemies.splice(i, 1); continue; } } // Update and cleanup powerups for (var i = powerups.length - 1; i >= 0; i--) { var p = powerups[i]; p.update(); if (p.y > 2732 + p.height / 2) { p.destroy(); powerups.splice(i, 1); continue; } // Collision with hero if (p.intersects(hero)) { LK.getSound('powerup').play(); // Check if this is a powerup3 (kill all enemies) if (p.assetId === 'powerup3') { // Kill all enemies instantly for (var j = enemies.length - 1; j >= 0; j--) { var e = enemies[j]; LK.getSound('enemyDown').play(); score += 10; scoreTxt.setText(score); // Restore 1 life every 50 points, but only on the exact frame score crosses a multiple of 50 if (score % 50 === 0 && heroLives < 5) { heroLives++; livesTxt.setText("♥ x" + heroLives); LK.effects.flashScreen(0x44de83, 400); } e.destroy(); enemies.splice(j, 1); } // Optional: flash screen to indicate effect LK.effects.flashScreen(0x00cfff, 600); } else // Check if this is a powerup2 (armor powerup) if (p.assetId === 'powerup2') { // 20% chance to grant triple shot if (Math.random() < 0.2) { hero.tripleShot = true; hero.tripleShotTimer = 300; // 5 seconds at 60fps // Remove other powerups if triple shot is granted hero.rapidFire = false; hero.rapidFireTimer = 0; hero.poweredUp = false; hero.powerupTimer = 0; tween(hero, { scaleX: 1.7, scaleY: 1.7 }, { duration: 200, easing: tween.elasticOut }); } else { // Grant 5 armor to hero if (typeof hero.armor === "undefined") hero.armor = 0; hero.armor += 5; // Optional: flash blue to indicate armor gain LK.effects.flashScreen(0x66ccff, 400); } } else { // 20% chance to grant rapid fire (faster shooting) if (Math.random() < 0.2) { hero.rapidFire = true; hero.rapidFireTimer = 300; // 5 seconds at 60fps hero.poweredUp = false; // Remove twin shot if rapid fire is granted tween(hero, { scaleX: 1.5, scaleY: 1.5 }, { duration: 200, easing: tween.elasticOut }); } else { hero.activatePowerup(); } // 40% chance to restore 1 life if not at max if (heroLives < 5 && Math.random() < 0.4) { heroLives++; livesTxt.setText("♥ x" + heroLives); // Optional: flash green to indicate heal LK.effects.flashScreen(0x44de83, 400); } } p.destroy(); powerups.splice(i, 1); continue; } } // Update armor display if (typeof hero.armor !== "undefined" && hero.armor > 0) { armorTxt.setText("🛡 x" + hero.armor); armorTxt.visible = true; } else { armorTxt.setText(""); armorTxt.visible = false; } // Win condition removed: score is now unlimited };