/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Enemy Shell Class var EnemyShell = Container.expand(function () { var self = Container.call(this); var shell = self.attachAsset('enemyShell', { anchorX: 0.5, anchorY: 0.5 }); self.width = shell.width; self.height = shell.height; self.vx = 0; self.vy = 8; // Reduced speed self.update = function () { self.x += self.vx; self.y += self.vy; }; return self; }); // Enemy Tank Class var EnemyTank = Container.expand(function () { var self = Container.call(this); var tank = self.attachAsset('enemyTank', { anchorX: 0.5, anchorY: 0.5 }); self.width = tank.width; self.height = tank.height; // Movement self.speed = 6 + Math.random() * 2 + Math.floor(LK.getScore() / 10); // Escalate with score // Firing self.fireInterval = 120; // 2 seconds at 60fps self.fireCounter = 0; self.update = function () { self.y += self.speed; self.fireCounter++; if (self.fireCounter >= self.fireInterval) { self.fireCounter = 0; self.fire(); } }; self.fire = function () { var shell = new EnemyShell(); shell.x = self.x; shell.y = self.y + self.height / 2 + shell.height / 2; // Aim at player var dx = player.x - shell.x; var dy = player.y - shell.y; var mag = Math.sqrt(dx * dx + dy * dy); // Lowered speed for enemy shells var shellSpeed = 7 + Math.floor(LK.getScore() / 20); shell.vx = dx / mag * shellSpeed; shell.vy = dy / mag * shellSpeed; enemyShells.push(shell); game.addChild(shell); LK.getSound('enemyFire').play(); }; return self; }); // Explosion effect (for destroyed tanks) var Explosion = Container.expand(function () { var self = Container.call(this); var exp = self.attachAsset('explosion', { anchorX: 0.5, anchorY: 0.5 }); exp.alpha = 0.7; // Animate fade out and destroy tween(exp, { alpha: 0 }, { duration: 350, easing: tween.linear, onFinish: function onFinish() { self.destroy(); } }); return self; }); // Heart Drop Class (powerup) var HeartDrop = Container.expand(function () { var self = Container.call(this); var heart = self.attachAsset('heart', { anchorX: 0.5, anchorY: 0.5 }); self.width = heart.width; self.height = heart.height; self.speed = 7 + Math.random() * 2; self.update = function () { self.y += self.speed; }; return self; }); // Player Shell Class var PlayerShell = Container.expand(function () { var self = Container.call(this); var shell = self.attachAsset('playerShell', { anchorX: 0.5, anchorY: 0.5 }); self.width = shell.width; self.height = shell.height; self.speed = -32; // Upwards self.update = function () { self.y += self.speed; }; return self; }); // Player Tank Class var PlayerTank = Container.expand(function () { var self = Container.call(this); var tank = self.attachAsset('playerTank', { anchorX: 0.5, anchorY: 0.5 }); self.width = tank.width; self.height = tank.height; // Fire cooldown self.canFire = true; self.fireCooldown = 18; // frames (0.3s) self.cooldownCounter = 0; self.update = function () { if (!self.canFire) { self.cooldownCounter++; if (self.cooldownCounter >= self.fireCooldown) { self.canFire = true; self.cooldownCounter = 0; } } }; // Fire a shell self.fire = function () { if (self.canFire) { var shell = new PlayerShell(); shell.x = self.x; shell.y = self.y - self.height / 2 - shell.height / 2; playerShells.push(shell); game.addChild(shell); LK.getSound('fire').play(); self.canFire = false; } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x22272b }); /**** * Game Code ****/ // Sound effects // Explosion: white ellipse (for flash effect) // Enemy shell: orange ellipse // Enemy tank: red box // Player shell: yellow ellipse // Player tank: green box // Game area var GAME_W = 2048; var GAME_H = 2732; // Player var player = new PlayerTank(); player.x = GAME_W / 2; player.y = GAME_H - 350; game.addChild(player); // Arrays for game objects var playerShells = []; var enemyTanks = []; var enemyShells = []; var heartDrops = []; // Array for heart drops // Score display var scoreTxt = new Text2('0', { size: 120, fill: "#fff" }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Player health var playerHealth = 5; var healthTxt = new Text2('❤❤❤❤❤', { size: 100, fill: 0xFF4444 }); healthTxt.anchor.set(0.5, 0); LK.gui.top.addChild(healthTxt); healthTxt.x = 300; healthTxt.y = 0; // Dragging var dragNode = null; // Spawn enemy timer var enemySpawnInterval = 90; // frames (1.5s) var enemySpawnCounter = 0; // Difficulty escalation function getEnemySpawnInterval() { var s = LK.getScore(); if (s < 10) return 90; if (s < 25) return 70; if (s < 50) return 55; return 40; } // Move handler (drag player tank) function handleMove(x, y, obj) { if (dragNode) { // Clamp to game area, avoid top 100px (menu) var minX = dragNode.width / 2; var maxX = GAME_W - dragNode.width / 2; var minY = 100 + dragNode.height / 2; var maxY = GAME_H - dragNode.height / 2; dragNode.x = Math.max(minX, Math.min(maxX, x)); dragNode.y = Math.max(minY, Math.min(maxY, y)); } } game.move = handleMove; game.down = function (x, y, obj) { // Only drag if touch is on player tank var local = player.toLocal(game.toGlobal({ x: x, y: y })); if (local.x > -player.width / 2 && local.x < player.width / 2 && local.y > -player.height / 2 && local.y < player.height / 2) { dragNode = player; } }; game.up = function (x, y, obj) { dragNode = null; }; // Tap to fire (anywhere) game.tap = function (x, y, obj) { player.fire(); }; // For compatibility, also fire on down if not dragging game.down = function (x, y, obj) { var local = player.toLocal(game.toGlobal({ x: x, y: y })); if (local.x > -player.width / 2 && local.x < player.width / 2 && local.y > -player.height / 2 && local.y < player.height / 2) { dragNode = player; } else { player.fire(); } }; // Main update loop game.update = function () { // Update player player.update(); // Update player shells for (var i = playerShells.length - 1; i >= 0; i--) { var shell = playerShells[i]; shell.update(); // Remove if off screen if (shell.y < -shell.height / 2) { shell.destroy(); playerShells.splice(i, 1); continue; } // Check collision with enemy tanks for (var j = enemyTanks.length - 1; j >= 0; j--) { var enemy = enemyTanks[j]; if (shell.intersects(enemy)) { // Explosion var exp = new Explosion(); exp.x = enemy.x; exp.y = enemy.y; game.addChild(exp); LK.getSound('explode').play(); // Remove both shell.destroy(); playerShells.splice(i, 1); enemy.destroy(); enemyTanks.splice(j, 1); // Score LK.setScore(LK.getScore() + 1); scoreTxt.setText(LK.getScore()); break; } } } // Update enemy tanks for (var i = enemyTanks.length - 1; i >= 0; i--) { var enemy = enemyTanks[i]; enemy.update(); // Remove if off screen if (enemy.y > GAME_H + enemy.height / 2) { enemy.destroy(); enemyTanks.splice(i, 1); continue; } // Check collision with player if (enemy.intersects(player)) { // Explosion var exp = new Explosion(); exp.x = player.x; exp.y = player.y; game.addChild(exp); LK.getSound('explode').play(); LK.effects.flashScreen(0xff0000, 800); // Decrease health playerHealth--; // Update health display var hearts = ''; for (var h = 0; h < playerHealth; h++) hearts += '❤'; healthTxt.setText(hearts); if (playerHealth <= 0) { LK.showGameOver(); return; } // Remove enemy tank enemy.destroy(); enemyTanks.splice(i, 1); continue; } } // Update enemy shells for (var i = enemyShells.length - 1; i >= 0; i--) { var shell = enemyShells[i]; shell.update(); // Remove if off screen if (shell.y > GAME_H + shell.height / 2 || shell.x < -shell.width / 2 || shell.x > GAME_W + shell.width / 2) { shell.destroy(); enemyShells.splice(i, 1); continue; } // Check collision with player if (shell.intersects(player)) { // Explosion var exp = new Explosion(); exp.x = player.x; exp.y = player.y; game.addChild(exp); LK.getSound('explode').play(); LK.effects.flashScreen(0xff0000, 800); // Decrease health playerHealth--; // Update health display var hearts = ''; for (var h = 0; h < playerHealth; h++) hearts += '❤'; healthTxt.setText(hearts); if (playerHealth <= 0) { LK.showGameOver(); return; } // Remove shell shell.destroy(); enemyShells.splice(i, 1); continue; } } // Spawn enemies enemySpawnCounter++; if (enemySpawnCounter >= getEnemySpawnInterval()) { enemySpawnCounter = 0; var enemy = new EnemyTank(); // Random x, avoid edges var margin = 200; enemy.x = margin + Math.random() * (GAME_W - 2 * margin); enemy.y = -enemy.height / 2; enemyTanks.push(enemy); game.addChild(enemy); } // Rarely spawn heart drops (about 1 in 400 frames, ~every 6-7 seconds) if (Math.random() < 1 / 400) { var heart = new HeartDrop(); var margin = 200; heart.x = margin + Math.random() * (GAME_W - 2 * margin); heart.y = -heart.height / 2; heartDrops.push(heart); game.addChild(heart); } // Update heart drops for (var i = heartDrops.length - 1; i >= 0; i--) { var heart = heartDrops[i]; heart.update(); // Remove if off screen if (heart.y > GAME_H + heart.height / 2) { heart.destroy(); heartDrops.splice(i, 1); continue; } // Check collision with player if (heart.intersects(player)) { // Only heal if not at max health if (playerHealth < 5) { playerHealth++; var hearts = ''; for (var h = 0; h < playerHealth; h++) hearts += '❤'; healthTxt.setText(hearts); } heart.destroy(); heartDrops.splice(i, 1); continue; } } }; // Set initial score LK.setScore(0); scoreTxt.setText('0'); ; // Set initial health playerHealth = 5; var hearts = ''; for (var h = 0; h < playerHealth; h++) hearts += '❤'; healthTxt.setText(hearts);