/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Enemy Shell 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.speed = 22 + Math.random() * 6; self.update = function () { self.y += self.speed; }; return self; }); // Enemy Tank 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; self.speed = 6 + Math.random() * enemySpeedIncrease; self.shootCooldown = 60 + Math.floor(Math.random() * 60); self.update = function () { self.y += self.speed; if (self.shootCooldown > 0) { self.shootCooldown--; } else { self.shoot(); self.shootCooldown = 90 + Math.floor(Math.random() * 60); } }; self.shoot = function () { var shell = new EnemyShell(); shell.x = self.x; shell.y = self.y + self.height / 2 + shell.height / 2; enemyShells.push(shell); game.addChild(shell); LK.getSound('enemyFire').play(); }; return self; }); // Explosion (visual effect only) var Explosion = Container.expand(function () { var self = Container.call(this); var exp = self.attachAsset('explosion', { anchorX: 0.5, anchorY: 0.5, scaleX: 0.5, scaleY: 0.5, alpha: 0.8 }); self.width = exp.width; self.height = exp.height; // Animate explosion tween(exp, { scaleX: 1.5, scaleY: 1.5, alpha: 0 }, { duration: 400, easing: tween.easeOut, onFinish: function onFinish() { self.destroy(); } }); return self; }); // Player Shell 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; self.update = function () { self.y += self.speed; }; return self; }); // Player Tank 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; self.shootCooldown = 0; self.poweredUp = false; self.powerupTimer = 0; // Shoot method self.shoot = function () { if (self.shootCooldown > 0) return; 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.shootCooldown = self.poweredUp ? 10 : 20; // Faster fire if powered up }; // Powerup method self.activatePowerup = function () { self.poweredUp = true; self.powerupTimer = 360; // 6 seconds at 60fps tween(self, { scaleX: 1.2, scaleY: 1.2 }, { duration: 200, easing: tween.elasticOut }); }; 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.poweredUp) { self.powerupTimer--; if (self.powerupTimer <= 0) self.deactivatePowerup(); } }; return self; }); // Powerup var Powerup = Container.expand(function () { var self = Container.call(this); var p = self.attachAsset('powerup', { anchorX: 0.5, anchorY: 0.5 }); self.width = p.width; self.height = p.height; self.speed = 10; self.update = function () { self.y += self.speed; }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x22272a }); /**** * Game Code ****/ // Can bar assets // Play music // Player Tank // Player Shell // Enemy Tank // Enemy Shell // Powerup // Explosion (for effect) // Sounds // Music LK.playMusic('battleTheme'); // Score var score = 0; var scoreTxt = new Text2('0', { size: 120, fill: '#fff' }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Player var player = new PlayerTank(); player.x = 2048 / 2; player.y = 2732 - 300; game.addChild(player); // --- Can Bar (Health Bar) --- var playerMaxHealth = 5; var playerHealth = playerMaxHealth; // Create can bar background (grey) var canBarBg = LK.getAsset('canBarBg', { anchorX: 0.5, anchorY: 0.5 }); canBarBg.width = 220; canBarBg.height = 32; canBarBg.x = player.x; canBarBg.y = player.y - player.height / 2 - 40; game.addChild(canBarBg); // Create can bar fill (green) var canBarFill = LK.getAsset('canBarFill', { anchorX: 0.5, anchorY: 0.5 }); canBarFill.width = 200; canBarFill.height = 20; canBarFill.x = player.x; canBarFill.y = player.y - player.height / 2 - 40; game.addChild(canBarFill); // Helper to update can bar position and fill function updateCanBar() { canBarBg.x = player.x; canBarBg.y = player.y - player.height / 2 - 40; canBarFill.x = player.x; canBarFill.y = player.y - player.height / 2 - 40; canBarFill.width = 200 * (playerHealth / playerMaxHealth); if (playerHealth / playerMaxHealth <= 0.4) { canBarFill.tint = 0xff3c00; // red if low } else if (playerHealth / playerMaxHealth <= 0.7) { canBarFill.tint = 0xffe000; // yellow if mid } else { canBarFill.tint = 0x4caf50; // green if healthy } } updateCanBar(); // Arrays for game objects var playerShells = []; var enemyTanks = []; var enemyShells = []; var powerups = []; var explosions = []; // Difficulty var enemySpawnTimer = 0; var enemySpawnInterval = 90; var enemySpeedIncrease = 0; var powerupTimer = 0; // Dragging var dragNode = null; // Move handler function handleMove(x, y, obj) { if (dragNode) { // Clamp tank inside game area (leave 100px margin at top for UI) var minX = player.width / 2; var maxX = 2048 - player.width / 2; var minY = 100 + player.height / 2; var maxY = 2732 - player.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 start drag if touch/click is on player tank var local = player.toLocal(game.toGlobal({ x: x, y: y })); if (Math.abs(local.x) <= player.width / 2 && Math.abs(local.y) <= player.height / 2) { dragNode = player; } }; game.up = function (x, y, obj) { dragNode = null; }; // Tap to shoot (anywhere) game.tap = function (x, y, obj) { player.shoot(); }; // For mobile: allow shooting by tapping anywhere except on UI game.down = function (x, y, obj) { // If tap is not on top UI, shoot if (y > 180) player.shoot(); // Also allow drag var local = player.toLocal(game.toGlobal({ x: x, y: y })); if (Math.abs(local.x) <= player.width / 2 && Math.abs(local.y) <= player.height / 2) { dragNode = player; } }; // Main update loop game.update = function () { // Player update player.update(); updateCanBar(); // 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) { 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); explosions.push(exp); LK.getSound('explode').play(); // Remove both enemy.destroy(); shell.destroy(); enemyTanks.splice(j, 1); playerShells.splice(i, 1); // Score score++; scoreTxt.setText(score); // Increase difficulty if (score % 10 === 0) { enemySpeedIncrease += 2; if (enemySpawnInterval > 30) enemySpawnInterval -= 5; } // Win condition if (score >= 50) { LK.showYouWin(); return; } break; } } } // Enemy tanks for (var i = enemyTanks.length - 1; i >= 0; i--) { var enemy = enemyTanks[i]; enemy.update(); // Remove if off screen if (enemy.y > 2732 + enemy.height) { enemy.destroy(); enemyTanks.splice(i, 1); continue; } // Collision with player if (enemy.intersects(player)) { LK.effects.flashScreen(0xff0000, 800); playerHealth--; updateCanBar(); if (playerHealth <= 0) { LK.showGameOver(); return; } // Remove enemy tank on collision enemy.destroy(); enemyTanks.splice(i, 1); continue; } } // Enemy shells for (var i = enemyShells.length - 1; i >= 0; i--) { var shell = enemyShells[i]; shell.update(); // Remove if off screen if (shell.y > 2732 + shell.height) { shell.destroy(); enemyShells.splice(i, 1); continue; } // Collision with player if (shell.intersects(player)) { LK.effects.flashScreen(0xff0000, 800); playerHealth--; updateCanBar(); if (playerHealth <= 0) { LK.showGameOver(); return; } // Remove shell on hit shell.destroy(); enemyShells.splice(i, 1); continue; } } // Powerups for (var i = powerups.length - 1; i >= 0; i--) { var p = powerups[i]; p.update(); // Remove if off screen if (p.y > 2732 + p.height) { p.destroy(); powerups.splice(i, 1); continue; } // Collision with player if (p.intersects(player)) { LK.getSound('powerup').play(); player.activatePowerup(); // Heal player by 1 can, up to max if (playerHealth < playerMaxHealth) { playerHealth++; updateCanBar(); } p.destroy(); powerups.splice(i, 1); } } // Explosions (auto-destroyed by tween) // Spawn enemy tanks enemySpawnTimer--; if (enemySpawnTimer <= 0) { var enemy = new EnemyTank(); enemy.x = 200 + Math.random() * (2048 - 400); enemy.y = -enemy.height / 2; enemyTanks.push(enemy); game.addChild(enemy); enemySpawnTimer = enemySpawnInterval + Math.floor(Math.random() * 40); } // Spawn powerups powerupTimer--; if (powerupTimer <= 0) { if (Math.random() < 0.25) { // 25% chance var p = new Powerup(); p.x = 200 + Math.random() * (2048 - 400); p.y = -p.height / 2; powerups.push(p); game.addChild(p); } powerupTimer = 600 + Math.floor(Math.random() * 600); // 10-20 seconds } }; // Initial timers enemySpawnTimer = 60; powerupTimer = 900; // Prevent UI overlap (top left 100x100 reserved) scoreTxt.x = 2048 / 2; scoreTxt.y = 20;