/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Creature projectile class with unique behaviors var CreatureProjectile = Container.expand(function () { var self = Container.call(this); var asset = self.attachAsset('bulletModel', { anchorX: 0.5, anchorY: 0.5 }); self.radius = 32; self.speed = 32; self.angle = 0; self.damage = 1; // Assign a unique behavior type to each projectile var behaviorTypes = ['homing', 'zigzag', 'boomerang', 'spiral', 'dash', 'orbit', 'bounce']; self.behavior = behaviorTypes[Math.floor(Math.random() * behaviorTypes.length)]; self.behaviorSeed = Math.random() * 10000; self.behaviorTick = 0; self.originX = self.x; self.originY = self.y; self.maxDistance = 1200 + Math.random() * 400; self.orbitAngle = Math.random() * Math.PI * 2; self.bounceCount = 0; self.update = function () { self.behaviorTick++; // Always fly straight toward the nearest enemy (no random behaviors) var nearest = null; var minDist = 999999; for (var i = 0; i < enemies.length; i++) { var e = enemies[i]; var dx = e.x - self.x; var dy = e.y - self.y; var d = Math.sqrt(dx * dx + dy * dy); if (d < minDist) { minDist = d; nearest = e; } } if (nearest && minDist > 1) { // Always point directly at the nearest enemy self.angle = Math.atan2(nearest.y - self.y, nearest.x - self.x); } // Move forward in a straight line self.x += Math.cos(self.angle) * self.speed; self.y += Math.sin(self.angle) * self.speed; // Save last position for AI self.lastX = self.x; self.lastY = self.y; // Remove projectile if it has traveled too far from its origin var dx0 = self.x - self.originX; var dy0 = self.y - self.originY; if (dx0 * dx0 + dy0 * dy0 > self.maxDistance * self.maxDistance) { self.destroy(); } }; return self; }); // Creature weapon class (auto-attacks for player) var CreatureWeapon = Container.expand(function () { var self = Container.call(this); // Attach asset (box, yellow) var asset = self.attachAsset('creature', { anchorX: 0.5, anchorY: 0.5 }); // Attach weapon model (sword) as a visual var weaponModel = self.attachAsset('weaponModel', { anchorX: 0.5, anchorY: 0.8 }); weaponModel.y = 60; // Offset so it appears in front of the player weaponModel.rotation = Math.PI / 8 * (Math.random() > 0.5 ? 1 : -1); // Slight random angle for variety weaponModel.alpha = 0.85; // Weapon stats self.damage = 1; self.speed = 32; self.cooldown = 60; // frames between shots self.timer = 0; self.projectileCount = 1; self.spread = 0.2; // radians // Update method: fires projectiles if timer is up self.update = function () { if (self.timer > 0) { self.timer--; } else { self.fire(); self.timer = self.cooldown; } }; // Fire projectiles in a spread self.fire = function () { // Projectiles orbit and launch from around the player var now = Date.now(); for (var i = 0; i < self.projectileCount; i++) { // Orbit offset for each projectile var orbitAngle = 2 * Math.PI / self.projectileCount * i + now % 1000 / 1000 * Math.PI * 2; var launchDist = 120 + Math.random() * 30; var px = player.x + Math.cos(orbitAngle) * launchDist; var py = player.y + Math.sin(orbitAngle) * launchDist; // Clamp projectile spawn to play area if (px < 0) px = 0; if (px > GAME_WIDTH) px = GAME_WIDTH; if (py < 0) py = 0; if (py > GAME_HEIGHT) py = GAME_HEIGHT; // Aim at nearest enemy if possible var target = null; var minDist = 999999; for (var j = 0; j < enemies.length; j++) { var e = enemies[j]; var dx = e.x - px; var dy = e.y - py; var d = Math.sqrt(dx * dx + dy * dy); if (d < minDist) { minDist = d; target = e; } } var angle; if (target) { angle = Math.atan2(target.y - py, target.x - px); } else { angle = orbitAngle; } var proj = new CreatureProjectile(); proj.x = px; proj.y = py; proj.angle = angle; proj.speed = self.speed; proj.damage = self.damage; projectiles.push(proj); game.addChild(proj); } }; // Upgrade weapon self.upgrade = function (type) { if (type === 'damage') self.damage++; if (type === 'speed') self.speed += 6; if (type === 'cooldown' && self.cooldown > 20) self.cooldown -= 8; if (type === 'projectile') self.projectileCount++; if (type === 'spread') self.spread += 0.1; if (type === 'area') { // Add area damage property if (!self.areaDamage) self.areaDamage = 1;else self.areaDamage += 1; } if (type === 'pierce') { // Add piercing property if (!self.pierce) self.pierce = 1;else self.pierce += 1; } if (type === 'regen') { // Add regen to player if (!player.regen) player.regen = 1;else player.regen += 1; } if (type === 'expBoost') { // Add exp boost to player if (!player.expBoost) player.expBoost = 0.2;else player.expBoost += 0.2; } }; return self; }); // Enemy class var Enemy = Container.expand(function () { var self = Container.call(this); var asset = self.attachAsset('enemy', { anchorX: 0.5, anchorY: 0.5 }); self.radius = 48; // Slow down very fast speeds of living beings (enemies) self.speed = 6 + Math.random() * 2.2; // reduced max speed from 9 to 8.2 if (self.speed > 8) self.speed = 8; // clamp to max 8 self.hp = 2 + Math.floor(wave * 0.5); self.maxHp = self.hp; // For movement self.update = function () { // Save last position for AI self.lastX = self.x; self.lastY = self.y; // Move towards player var dx = player.x - self.x; var dy = player.y - self.y; var dist = Math.sqrt(dx * dx + dy * dy); if (dist > 0) { self.x += dx / dist * self.speed; self.y += dy / dist * self.speed; } }; // Take damage self.takeDamage = function (amount) { self.hp -= amount; LK.effects.flashObject(self, 0xffff00, 200); if (self.hp <= 0) { spawnExp(self.x, self.y, 1 + Math.floor(wave * 0.2)); self.destroy(); return true; } return false; }; return self; }); // Experience gem class var ExpGem = Container.expand(function () { var self = Container.call(this); var asset = self.attachAsset('expGem', { anchorX: 0.5, anchorY: 0.5 }); self.radius = 28; self.value = 1; self.update = function () { // Move towards player if close var dx = player.x - self.x; var dy = player.y - self.y; var dist = Math.sqrt(dx * dx + dy * dy); var moveTarget = null; var minDist = dist; if (dist < 300) { moveTarget = player; minDist = dist; } // Also move towards living beings (enemies) that have weapons in their hands for (var i = 0; i < enemies.length; i++) { var e = enemies[i]; // Assume enemies with weapons have a property hasWeapon === true if (e.hasWeapon) { var edx = e.x - self.x; var edy = e.y - self.y; var edist = Math.sqrt(edx * edx + edy * edy); if (edist < 300 && edist < minDist) { moveTarget = e; minDist = edist; } } } if (moveTarget && minDist < 300) { var mdx = moveTarget.x - self.x; var mdy = moveTarget.y - self.y; var mlen = Math.sqrt(mdx * mdx + mdy * mdy); if (mlen > 0) { self.x += mdx / mlen * 18; self.y += mdy / mlen * 18; } } }; return self; }); // Player character class var Player = Container.expand(function () { var self = Container.call(this); // Attach player asset (ellipse, green) var playerAsset = self.attachAsset('player', { anchorX: 0.5, anchorY: 0.5 }); // Attach weapon model (gun) to player's hand var gunModel = self.attachAsset('weaponModel', { anchorX: 0.2, // grip point anchorY: 0.7 }); gunModel.x = 38; // offset to player's right hand gunModel.y = 38; gunModel.rotation = Math.PI / 8; gunModel.alpha = 0.95; self.gunModel = gunModel; // Set up player stats self.radius = 60; // for collision self.speed = 18; // movement speed per frame self.level = 1; self.exp = 0; self.expToLevel = 10; self.hp = 3; self.maxHp = 3; // For movement smoothing self.targetX = GAME_WIDTH / 2; self.targetY = GAME_HEIGHT / 2; // For invulnerability after hit self.invulnTicks = 0; // Update method self.update = function () { // Smoothly move towards target var dx = self.targetX - self.x; var dy = self.targetY - self.y; var dist = Math.sqrt(dx * dx + dy * dy); if (dist > self.speed) { self.x += dx / dist * self.speed; self.y += dy / dist * self.speed; } else { self.x = self.targetX; self.y = self.targetY; } // Clamp to game area if (self.x < self.radius) self.x = self.radius; if (self.x > GAME_WIDTH - self.radius) self.x = GAME_WIDTH - self.radius; if (self.y < self.radius) self.y = self.radius; if (self.y > GAME_HEIGHT - self.radius) self.y = GAME_HEIGHT - self.radius; // Invulnerability timer if (self.invulnTicks > 0) { self.invulnTicks--; playerAsset.alpha = self.invulnTicks % 10 < 5 ? 0.5 : 1; } else { playerAsset.alpha = 1; } // Update gun model to follow hand (right side of player) if (self.gunModel) { // Gun follows player's facing direction (right side) self.gunModel.x = self.radius * 0.55; self.gunModel.y = self.radius * 0.25; // Find nearest living creature (enemy) var nearest = null; var minDist = 999999; for (var i = 0; i < enemies.length; i++) { var e = enemies[i]; var dx = e.x - (self.x + self.gunModel.x); var dy = e.y - (self.y + self.gunModel.y); var d = Math.sqrt(dx * dx + dy * dy); if (d < minDist) { minDist = d; nearest = e; } } if (nearest) { // Point gun barrel at nearest enemy var dx = nearest.x - (self.x + self.gunModel.x); var dy = nearest.y - (self.y + self.gunModel.y); self.gunModel.rotation = Math.atan2(dy, dx); } else { // Optionally, add a little bobbing for effect if no enemy self.gunModel.rotation = Math.PI / 8 + Math.sin(LK.ticks * 0.08) * 0.08; } } }; // Level up self.gainExp = function (amount) { var gain = amount; if (self.expBoost) gain = Math.floor(amount * (1 + self.expBoost)); self.exp += gain; while (self.exp >= self.expToLevel) { self.exp -= self.expToLevel; self.level++; self.expToLevel = Math.floor(self.expToLevel * 1.3 + 5); showLevelUp(); } updateExpBar(); }; // Take damage self.takeDamage = function () { if (self.invulnTicks > 0) return; self.hp--; updateHpBar(); self.invulnTicks = 60; LK.effects.flashObject(self, 0xff0000, 500); if (self.hp <= 0) { LK.effects.flashScreen(0xff0000, 1000); LK.showGameOver(); } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x1a1a1a }); /**** * Game Code ****/ // Level up tab model (for future customization) // Weapon model asset (simple sword shape) // --- GUI Elements --- var player; var creatureWeapon; var projectiles = []; var enemies = []; var expGems = []; var wave = 1; // still used for scaling difficulty var dragNode = null; // --- GUI Elements --- var scoreTxt = new Text2('0', { size: 100, fill: "#fff" }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); var expBar = new Text2('', { size: 60, fill: 0xAAFF00 }); expBar.anchor.set(0.5, 0); LK.gui.top.addChild(expBar); var hpBar = new Text2('', { size: 60, fill: 0xFF4444 }); hpBar.anchor.set(0.5, 0); LK.gui.top.addChild(hpBar); // --- Level Progress Bar --- var levelProgressBar = new Text2('', { size: 48, fill: 0x00EAFF }); levelProgressBar.anchor.set(0.5, 0); LK.gui.top.addChild(levelProgressBar); // --- Asset Screen Button --- var assetScreenBtn = new Text2('Assets', { size: 60, fill: "#fff" }); assetScreenBtn.anchor.set(0.5, 0.5); assetScreenBtn.x = 1800; assetScreenBtn.y = 80; LK.gui.top.addChild(assetScreenBtn); var assetScreenPopup = null; assetScreenBtn.down = function (x, y, obj) { if (assetScreenPopup) return; assetScreenPopup = new Container(); var bg = LK.getAsset('levelUpBg', { width: 1200, height: 1200, color: 0x222244, shape: 'box', anchorX: 0.5, anchorY: 0.5 }); assetScreenPopup.addChild(bg); bg.x = 0; bg.y = 0; var title = new Text2('Assets', { size: 120, fill: "#fff" }); title.anchor.set(0.5, 0); title.x = 0; title.y = -520; assetScreenPopup.addChild(title); // Show player, gun, and police-compatible asset (enemy) var yStart = -320; var yStep = 320; var assetList = [{ id: 'player', label: 'Player' }, { id: 'weaponModel', label: 'Gun' }, { id: 'enemy', label: 'Police' }]; for (var i = 0; i < assetList.length; i++) { var assetInfo = assetList[i]; var assetIcon = LK.getAsset(assetInfo.id, { anchorX: 0.5, anchorY: 0.5, scaleX: 2, scaleY: 2 }); assetIcon.x = -300; assetIcon.y = yStart + i * yStep; assetScreenPopup.addChild(assetIcon); var label = new Text2(assetInfo.label, { size: 80, fill: "#fff" }); label.anchor.set(0, 0.5); label.x = -180; label.y = assetIcon.y; assetScreenPopup.addChild(label); } // Close button var closeBtn = LK.getAsset('levelUpBtnClose', { width: 300, height: 100, color: 0x4444aa, shape: 'box', anchorX: 0.5, anchorY: 0.5 }); closeBtn.x = 0; closeBtn.y = 520; assetScreenPopup.addChild(closeBtn); var closeTxt = new Text2('Close', { size: 60, fill: "#fff" }); closeTxt.anchor.set(0.5, 0.5); closeTxt.x = 0; closeTxt.y = closeBtn.y; assetScreenPopup.addChild(closeTxt); closeBtn.down = function (x, y, obj) { LK.gui.center.removeChild(assetScreenPopup); assetScreenPopup = null; }; assetScreenPopup.x = 0; assetScreenPopup.y = 0; LK.gui.center.addChild(assetScreenPopup); }; function updateExpBar() { expBar.setText('LV ' + player.level + ' EXP: ' + player.exp + '/' + player.expToLevel); // Level progress bar var percent = Math.min(1, player.exp / player.expToLevel); var barLen = 600; var filled = Math.floor(barLen * percent); var empty = barLen - filled; var bar = ''; for (var i = 0; i < filled / 20; i++) bar += '█'; for (var i = 0; i < empty / 20; i++) bar += '░'; levelProgressBar.setText('Level Progress: ' + bar + ' ' + Math.floor(percent * 100) + '%'); } function updateHpBar() { hpBar.setText('HP: ' + player.hp + '/' + player.maxHp); } function updateScore() { scoreTxt.setText('Wave: ' + wave); } // --- Asset initialization (shapes) --- // --- Game setup --- // Add background model (for future customization) var backgroundModel = LK.getAsset('levelUpBg', { anchorX: 0.5, anchorY: 0.5, scaleX: GAME_WIDTH / 100, scaleY: GAME_HEIGHT / 100, x: GAME_WIDTH / 2, y: GAME_HEIGHT / 2 }); game.addChild(backgroundModel); player = new Player(); // Expanded play area var GAME_WIDTH = 3072; var GAME_HEIGHT = 4096; player.x = GAME_WIDTH / 2; player.y = GAME_HEIGHT / 2; game.addChild(player); creatureWeapon = new CreatureWeapon(); game.addChild(creatureWeapon); updateExpBar(); updateHpBar(); updateScore(); // --- Level up popup --- var levelUpPopup = null; function showLevelUp() { if (levelUpPopup) return; // Already showing // Randomly pick 3 upgrades var upgrades = [{ type: 'damage', label: 'Creature Damage +' }, { type: 'speed', label: 'Creature Speed +' }, { type: 'cooldown', label: 'Faster Attacks' }, { type: 'projectile', label: 'More Projectiles' }, { type: 'spread', label: 'Wider Spread' }, { type: 'area', label: 'Area Damage (AOE)' }, { type: 'pierce', label: 'Piercing Projectiles' }, { type: 'regen', label: 'Regenerate HP' }, { type: 'expBoost', label: 'EXP Gain +' }]; // Shuffle and pick 3 for (var i = upgrades.length - 1; i > 0; i--) { var j = Math.floor(Math.random() * (i + 1)); var t = upgrades[i]; upgrades[i] = upgrades[j]; upgrades[j] = t; } var options = upgrades.slice(0, 3); // Popup container levelUpPopup = new Container(); var bg = LK.getAsset('levelUpTab', { anchorX: 0.5, anchorY: 0.5, scaleX: 2.2, scaleY: 6 }); levelUpPopup.addChild(bg); bg.x = 0; bg.y = 0; var title = new Text2('LEVEL UP!', { size: 120, fill: "#fff" }); title.anchor.set(0.5, 0); title.x = 0; title.y = -300; levelUpPopup.addChild(title); // Option buttons for (var i = 0; i < 3; i++) { (function (idx) { var opt = options[idx]; var btn = LK.getAsset('levelUpBtn' + idx, { width: 700, height: 140, color: 0x4444aa, shape: 'box', anchorX: 0.5, anchorY: 0.5 }); btn.x = 0; btn.y = -80 + idx * 180; levelUpPopup.addChild(btn); var txt = new Text2(opt.label, { size: 70, fill: "#fff" }); txt.anchor.set(0.5, 0.5); txt.x = 0; txt.y = btn.y; levelUpPopup.addChild(txt); btn.down = function (x, y, obj) { creatureWeapon.upgrade(opt.type); // Remove popup LK.gui.center.removeChild(levelUpPopup); levelUpPopup = null; }; })(i); } levelUpPopup.x = 0; levelUpPopup.y = 0; LK.gui.center.addChild(levelUpPopup); } // --- Spawn experience gem --- function spawnExp(x, y, value) { var gem = new ExpGem(); gem.x = x; gem.y = y; gem.value = value; expGems.push(gem); game.addChild(gem); } // --- Continuous enemy spawn system --- var spawnDelay = 32; // frames between spawns, will decrease as wave increases var spawnDelayTimer = 0; // Add a delay before the first enemy spawns var initialSpawnDelay = 120; // 2 seconds at 60fps var initialSpawnDelayTimer = 0; // Limit for max living enemies, starts low and increases over time var maxLivingEnemies = 3; var maxLivingEnemiesIncreaseInterval = 60 * 60 * 3; // 3 minutes at 60fps var lastMaxLivingEnemiesIncreaseTick = 0; function updateSpawnRate() { // Increase spawn rate over time, but clamp to a minimum spawnDelay = Math.max(4, 32 - Math.floor(wave * 1.2)); } function spawnEnemy() { if (enemies.length >= maxLivingEnemies) return; // Don't spawn if at max var enemy = new Enemy(); // Give some enemies weapons in their hands (e.g. 30% chance) enemy.hasWeapon = Math.random() < 0.3; // Spawn at random edge var edge = Math.floor(Math.random() * 4); if (edge === 0) { // top enemy.x = Math.random() * GAME_WIDTH; enemy.y = -100; } else if (edge === 1) { // bottom enemy.x = Math.random() * GAME_WIDTH; enemy.y = GAME_HEIGHT + 100; } else if (edge === 2) { // left enemy.x = -100; enemy.y = Math.random() * GAME_HEIGHT; } else { // right enemy.x = GAME_WIDTH + 100; enemy.y = Math.random() * GAME_HEIGHT; } enemies.push(enemy); game.addChild(enemy); } // --- Game move handler (touch/mouse drag to move player) --- function handleMove(x, y, obj) { // Don't allow movement if level up popup is open if (levelUpPopup) return; // Clamp to avoid top left menu if (x < 100) x = 100; if (y < 0) y = 0; player.targetX = x; player.targetY = y; } game.move = handleMove; game.down = function (x, y, obj) { handleMove(x, y, obj); }; game.up = function (x, y, obj) { // No dragNode needed, movement is always allowed }; // --- Main game update loop --- game.update = function () { // Pause all game logic except GUI and popup when level up popup is open if (levelUpPopup) { // Only update GUI, skip all gameplay logic return; } // Player regen if (player.regen && LK.ticks % 90 === 0 && player.hp < player.maxHp) { player.hp += player.regen; if (player.hp > player.maxHp) player.hp = player.maxHp; updateHpBar(); } // Update player player.update(); // Update weapon creatureWeapon.update(); // Update projectiles for (var i = projectiles.length - 1; i >= 0; i--) { var proj = projectiles[i]; proj.update(); // Remove if out of bounds if (proj.x < -100 || proj.x > GAME_WIDTH + 100 || proj.y < -100 || proj.y > GAME_HEIGHT + 100) { proj.destroy(); projectiles.splice(i, 1); continue; } // Check collision with enemies for (var j = enemies.length - 1; j >= 0; j--) { var enemy = enemies[j]; var dx = proj.x - enemy.x; var dy = proj.y - enemy.y; var dist = Math.sqrt(dx * dx + dy * dy); if (dist < proj.radius + enemy.radius) { var killed = enemy.takeDamage(proj.damage); // Area damage if (creatureWeapon.areaDamage) { for (var k = 0; k < enemies.length; k++) { if (k !== j) { var e2 = enemies[k]; var d2 = Math.sqrt((proj.x - e2.x) * (proj.x - e2.x) + (proj.y - e2.y) * (proj.y - e2.y)); if (d2 < 180) { e2.takeDamage(creatureWeapon.areaDamage); } } } } // Piercing if (creatureWeapon.pierce && proj.pierced === undefined) { proj.pierced = 1; } if (creatureWeapon.pierce && proj.pierced < creatureWeapon.pierce) { proj.pierced++; // Do not destroy, allow to hit more enemies } else { proj.destroy(); projectiles.splice(i, 1); } if (killed) { enemies.splice(j, 1); } break; } } } // Update enemies for (var i = enemies.length - 1; i >= 0; i--) { var enemy = enemies[i]; enemy.update(); // Check collision with player var dx = enemy.x - player.x; var dy = enemy.y - player.y; var dist = Math.sqrt(dx * dx + dy * dy); // If enemy is still alive and close enough to player, but projectiles should kill before touching if (dist < enemy.radius + player.radius) { // Check if any projectile is close enough to kill this enemy before it touches the player var killedByProjectile = false; for (var p = 0; p < projectiles.length; p++) { var proj = projectiles[p]; var pdx = proj.x - enemy.x; var pdy = proj.y - enemy.y; var pdist = Math.sqrt(pdx * pdx + pdy * pdy); if (pdist < proj.radius + enemy.radius) { var killed = enemy.takeDamage(proj.damage); proj.destroy(); projectiles.splice(p, 1); if (killed) { enemies.splice(i, 1); killedByProjectile = true; } break; } } // Only damage player if enemy was not killed by projectile and not during level up if (!killedByProjectile && !levelUpPopup) { player.takeDamage(); // Knockback enemy var angle = Math.atan2(dy, dx); enemy.x += Math.cos(angle) * 120; enemy.y += Math.sin(angle) * 120; } // Prevent creatures from causing damage while level up popup is open if (!killedByProjectile && levelUpPopup) { // Do not damage player or apply knockback } } } // Update exp gems for (var i = expGems.length - 1; i >= 0; i--) { var gem = expGems[i]; gem.update(); // Collect if close to player var dx = gem.x - player.x; var dy = gem.y - player.y; var dist = Math.sqrt(dx * dx + dy * dy); if (dist < gem.radius + player.radius) { player.gainExp(gem.value); gem.destroy(); expGems.splice(i, 1); } } // Continuous enemy spawn (no waves) if (!levelUpPopup) { // Wait for initial spawn delay before starting enemy spawns if (initialSpawnDelayTimer < initialSpawnDelay) { initialSpawnDelayTimer++; } else { spawnDelayTimer++; if (spawnDelayTimer >= spawnDelay) { spawnEnemy(); spawnDelayTimer = 0; } // Increase difficulty over time, every 10 seconds if (LK.ticks % (60 * 10) === 0) { wave++; updateScore(); updateSpawnRate(); } // Increase maxLivingEnemies by 1 every 3 minutes if (LK.ticks - lastMaxLivingEnemiesIncreaseTick >= maxLivingEnemiesIncreaseInterval) { maxLivingEnemies++; lastMaxLivingEnemiesIncreaseTick = LK.ticks; } } } }; // --- GUI positioning --- scoreTxt.x = GAME_WIDTH / 2; scoreTxt.y = 20; expBar.x = GAME_WIDTH / 2; expBar.y = 140; levelProgressBar.x = GAME_WIDTH / 2; levelProgressBar.y = 200; hpBar.x = GAME_WIDTH / 2; hpBar.y = 280; assetScreenBtn.x = GAME_WIDTH - 200; assetScreenBtn.y = 80; // --- Start first wave --- // No prepareWave needed; enemy spawning is now continuous.