diff --git a/game/towers/HRBPTower.ts b/game/towers/HRBPTower.ts
new file mode 100644
index 0000000..14b435e
--- /dev/null
+++ b/game/towers/HRBPTower.ts
@@ -0,0 +1,90 @@
+import type Phaser from 'phaser'
+import { TowerBase } from './TowerBase'
+import type { EnemyBase } from '../enemies/EnemyBase'
+import type { TowerBase as TowerBaseType } from './TowerBase'
+
+const BUFF_ATTACK_SPEED_BONUS = 0.2
+
+export class HRBPTower extends TowerBase {
+  private buffCooldown: number = 0
+  private readonly BUFF_INTERVAL = 500
+  private nearbyTowersBuff: Set<TowerBaseType> = new Set()
+
+  constructor(scene: Phaser.Scene, gridX: number, gridY: number) {
+    super(scene, gridX, gridY, 80, 1, 0, 0)
+    this.drawSprite()
+  }
+
+  drawSprite(): void {
+    if (!this.sprite) return
+    this.sprite.clear()
+    // 菱形（粉色）
+    this.sprite.fillStyle(0xec4899, 1)
+    this.sprite.fillTriangle(0, -16, 16, 0, 0, 16)
+    this.sprite.fillTriangle(0, -16, -16, 0, 0, 16)
+    this.sprite.setPosition(this.px, this.py)
+    this.sprite.setDepth(10)
+  }
+
+  override update(delta: number, enemies: EnemyBase[]): void {
+    // HRBP 没有攻击逻辑，只做 BUFF
+    void enemies
+
+    if (!this.isActive) {
+      this.stamina = Math.min(
+        this.maxStamina,
+        this.stamina + (this.staminaRegen * delta) / 1000
+      )
+      if (this.stamina > 20) this.isActive = true
+      this.updateStaminaBar()
+      return
+    }
+
+    this.buffCooldown -= delta
+    if (this.buffCooldown <= 0) {
+      this.buffCooldown = this.BUFF_INTERVAL
+      this.applyBuffToNearby()
+    }
+  }
+
+  setNearbyTowers(towers: TowerBaseType[]): void {
+    this.nearbyTowersBuff = new Set(towers)
+  }
+
+  private applyBuffToNearby(): void {
+    if (this.nearbyTowersBuff.size === 0) return
+    if (this.stamina < 5) {
+      this.isActive = false
+      return
+    }
+    this.stamina -= 5
+    this.updateStaminaBar()
+    // BUFF 效果通过 attackSpeedMultiplier 外部读取
+    // 这里显示一个粉色光圈效果
+    this.showBuffEffect()
+  }
+
+  private showBuffEffect(): void {
+    const g = this.scene.add.graphics()
+    g.lineStyle(2, 0xec4899, 0.6)
+    g.strokeCircle(this.px, this.py, 90)
+    g.setDepth(8)
+    this.scene.tweens.add({
+      targets: g,
+      alpha: 0,
+      duration: 400,
+      onComplete: () => g.destroy(),
+    })
+  }
+
+  getBuffedTowers(): Set<TowerBaseType> {
+    return this.nearbyTowersBuff
+  }
+
+  getAttackSpeedBonus(): number {
+    return BUFF_ATTACK_SPEED_BONUS
+  }
+
+  // HRBP 无直接攻击
+  attack(_target: EnemyBase): void {}
+}
diff --git a/game/towers/InternTower.ts b/game/towers/InternTower.ts
new file mode 100644
index 0000000..2710ad4
--- /dev/null
+++ b/game/towers/InternTower.ts
@@ -0,0 +1,91 @@
+import type Phaser from 'phaser'
+import { TowerBase } from './TowerBase'
+import { GameManager } from '../GameManager'
+import type { EnemyBase } from '../enemies/EnemyBase'
+
+export class InternTower extends TowerBase {
+  private selfDestroyTimer: number = 0
+  private readonly SELF_DESTROY_INTERVAL = 1000
+  private destroyed: boolean = false
+  public onSelfDestroy?: (tower: InternTower) => void
+
+  constructor(scene: Phaser.Scene, gridX: number, gridY: number) {
+    super(scene, gridX, gridY, 50, 1, 15, 1.5)
+    this.drawSprite()
+  }
+
+  drawSprite(): void {
+    if (!this.sprite) return
+    this.sprite.clear()
+    // 绿色小人（圆头+十字身体）
+    this.sprite.fillStyle(0x22c55e, 1)
+    this.sprite.fillCircle(0, -12, 8)
+    // 身体
+    this.sprite.fillRect(-3, -4, 6, 14)
+    // 手臂
+    this.sprite.fillRect(-12, -2, 24, 4)
+    this.sprite.setPosition(this.px, this.py)
+    this.sprite.setDepth(10)
+  }
+
+  override update(delta: number, enemies: EnemyBase[]): void {
+    if (this.destroyed) return
+
+    super.update(delta, enemies)
+
+    // 被动：每秒1%概率离场
+    this.selfDestroyTimer += delta
+    if (this.selfDestroyTimer >= this.SELF_DESTROY_INTERVAL) {
+      this.selfDestroyTimer -= this.SELF_DESTROY_INTERVAL
+      if (Math.random() < 0.01) {
+        // 退还 25 HC
+        GameManager.getInstance().addHC(25)
+        this.showMessage('实习生跑路！+25HC')
+        this.destroyed = true
+        this.onSelfDestroy?.(this)
+        this.destroy()
+        return
+      }
+    }
+  }
+
+  attack(target: EnemyBase): void {
+    // 整顿职场：5% 概率秒杀 HP < 500 的怪物
+    if (Math.random() < 0.05 && target.hp < 500) {
+      target.takeDamage(9999)
+      this.showMessage('整顿职场！秒杀！')
+    } else {
+      target.takeDamage(this.attackDamage)
+    }
+    // 近战效果（闪光）
+    this.showMeleeEffect(target)
+  }
+
+  private showMeleeEffect(target: EnemyBase): void {
+    const g = this.scene.add.graphics()
+    g.fillStyle(0x22c55e, 0.7)
+    g.fillCircle(target.sprite.x, target.sprite.y, 10)
+    g.setDepth(15)
+    this.scene.time.delayedCall(150, () => g.destroy())
+  }
+
+  private showMessage(msg: string): void {
+    const txt = this.scene.add
+      .text(this.px, this.py - 30, msg, {
+        fontFamily: 'VT323, monospace',
+        fontSize: '14px',
+        color: '#22C55E',
+        backgroundColor: '#14532D',
+        padding: { x: 4, y: 2 },
+      })
+      .setOrigin(0.5, 1)
+      .setDepth(20)
+    this.scene.tweens.add({
+      targets: txt,
+      y: this.py - 55,
+      alpha: 0,
+      duration: 1200,
+      onComplete: () => txt.destroy(),
+    })
+  }
+}
diff --git a/game/towers/PPTMasterTower.ts b/game/towers/PPTMasterTower.ts
new file mode 100644
index 0000000..9411dfe
--- /dev/null
+++ b/game/towers/PPTMasterTower.ts
@@ -0,0 +1,60 @@
+import type Phaser from 'phaser'
+import { TowerBase } from './TowerBase'
+import type { EnemyBase } from '../enemies/EnemyBase'
+
+export class PPTMasterTower extends TowerBase {
+  constructor(scene: Phaser.Scene, gridX: number, gridY: number) {
+    super(scene, gridX, gridY, 100, 3, 5, 1.5)
+    this.drawSprite()
+  }
+
+  drawSprite(): void {
+    if (!this.sprite) return
+    this.sprite.clear()
+    // 橙色圆形
+    this.sprite.fillStyle(0xf59e0b, 1)
+    this.sprite.fillCircle(0, 0, 16)
+    // 圆心白点
+    this.sprite.fillStyle(0xffffff, 0.9)
+    this.sprite.fillCircle(0, 0, 5)
+    this.sprite.setPosition(this.px, this.py)
+    this.sprite.setDepth(10)
+  }
+
+  attack(target: EnemyBase): void {
+    // AOE 攻击：对射程内所有怪物造成伤害 + 减速
+    this.showAoeEffect()
+  }
+
+  /** 该方法由 TowerManager 调用，传入全体敌人 */
+  attackAoe(enemies: EnemyBase[]): void {
+    const rangePx = this.attackRange * 80 // TILE_SIZE
+    this.showAoeEffect()
+    for (const e of enemies) {
+      if (e.isDead) continue
+      const dx = e.sprite.x - this.px
+      const dy = e.sprite.y - this.py
+      const dist = Math.sqrt(dx * dx + dy * dy)
+      if (dist <= rangePx) {
+        e.takeDamage(this.attackDamage)
+        // 黑话领域：减速40%持续2秒
+        e.addSlow(0.4, 2000)
+      }
+    }
+  }
+
+  private showAoeEffect(): void {
+    const g = this.scene.add.graphics()
+    g.lineStyle(2, 0xf59e0b, 0.8)
+    g.strokeCircle(this.px, this.py, this.attackRange * 80)
+    g.setDepth(12)
+    this.scene.tweens.add({
+      targets: g,
+      alpha: 0,
+      scaleX: 1.2,
+      scaleY: 1.2,
+      duration: 400,
+      onComplete: () => g.destroy(),
+    })
+  }
+}
diff --git a/game/towers/SeniorDevTower.ts b/game/towers/SeniorDevTower.ts
new file mode 100644
index 0000000..8484447
--- /dev/null
+++ b/game/towers/SeniorDevTower.ts
@@ -0,0 +1,76 @@
+import type Phaser from 'phaser'
+import { TowerBase } from './TowerBase'
+import type { EnemyBase } from '../enemies/EnemyBase'
+
+export class SeniorDevTower extends TowerBase {
+  constructor(scene: Phaser.Scene, gridX: number, gridY: number) {
+    super(scene, gridX, gridY, 120, 5, 30, 1.0)
+    this.drawSprite()
+  }
+
+  drawSprite(): void {
+    if (!this.sprite) return
+    this.sprite.clear()
+    // 深蓝色方块
+    this.sprite.fillStyle(0x3b82f6, 1)
+    this.sprite.fillRect(-12, -12, 24, 24)
+    this.sprite.lineStyle(1, 0x93c5fd, 1)
+    this.sprite.strokeRect(-12, -12, 24, 24)
+    this.sprite.setPosition(this.px, this.py)
+    this.sprite.setDepth(10)
+
+    // 顶部 </> 符号文字
+    if (this.scene) {
+      const existing = this.scene.children.getByName(`dev_label_${this.gridX}_${this.gridY}`)
+      if (!existing) {
+        this.scene.add
+          .text(this.px, this.py, '</>', {
+            fontFamily: 'monospace',
+            fontSize: '10px',
+            color: '#DBEAFE',
+          })
+          .setOrigin(0.5, 0.5)
+          .setDepth(11)
+          .setName(`dev_label_${this.gridX}_${this.gridY}`)
+      }
+    }
+  }
+
+  attack(target: EnemyBase): void {
+    // 发射绿色代码块子弹
+    this.fireBullet(target)
+  }
+
+  private fireBullet(target: EnemyBase): void {
+    const bullet = this.scene.add.graphics()
+    bullet.fillStyle(0x22c55e, 1)
+    bullet.fillRect(-4, -4, 8, 8)
+    bullet.setPosition(this.px, this.py)
+    bullet.setDepth(13)
+
+    const startX = this.px
+    const startY = this.py
+    const targetX = target.sprite.x
+    const targetY = target.sprite.y
+
+    const dx = targetX - startX
+    const dy = targetY - startY
+    const dist = Math.sqrt(dx * dx + dy * dy)
+    const duration = (dist / 400) * 1000
+
+    this.scene.tweens.add({
+      targets: bullet,
+      x: targetX,
+      y: targetY,
+      duration,
+      onComplete: () => {
+        bullet.destroy()
+        if (!target.isDead) {
+          target.takeDamage(this.attackDamage)
+          // 代码屎山：附加 DOT
+          target.addDOT(10, 3000)
+        }
+      },
+    })
+  }
+}
diff --git a/game/towers/TowerBase.ts b/game/towers/TowerBase.ts
new file mode 100644
index 0000000..4ae6a98
--- /dev/null
+++ b/game/towers/TowerBase.ts
@@ -0,0 +1,145 @@
+import type Phaser from 'phaser'
+import { GameManager } from '../GameManager'
+import { TILE_SIZE, HUD_HEIGHT, COFFEE_COST, STAMINA_MAX, STAMINA_REGEN } from '../constants'
+import type { EnemyBase } from '../enemies/EnemyBase'
+
+export abstract class TowerBase {
+  protected scene: Phaser.Scene
+  public gridX: number
+  public gridY: number
+  protected sprite!: Phaser.GameObjects.Graphics
+  protected staminaBar!: Phaser.GameObjects.Graphics
+
+  public readonly cost: number
+  public readonly attackRange: number
+  public readonly attackDamage: number
+  public readonly attackSpeed: number
+  public readonly maxStamina: number = STAMINA_MAX
+  public stamina: number = STAMINA_MAX
+
+  protected attackCooldown: number = 0
+  protected staminaRegen: number = STAMINA_REGEN
+  protected isActive: boolean = true
+
+  // Pixel center position
+  protected px: number
+  protected py: number
+
+  constructor(
+    scene: Phaser.Scene,
+    gridX: number,
+    gridY: number,
+    cost: number,
+    attackRange: number,
+    attackDamage: number,
+    attackSpeed: number
+  ) {
+    this.scene = scene
+    this.gridX = gridX
+    this.gridY = gridY
+    this.cost = cost
+    this.attackRange = attackRange
+    this.attackDamage = attackDamage
+    this.attackSpeed = attackSpeed
+
+    this.px = gridX * TILE_SIZE + TILE_SIZE / 2
+    this.py = gridY * TILE_SIZE + TILE_SIZE / 2 + HUD_HEIGHT
+
+    this.sprite = scene.add.graphics()
+    this.staminaBar = scene.add.graphics()
+
+    this.drawSprite()
+    this.updateStaminaBar()
+  }
+
+  update(delta: number, enemies: EnemyBase[]): void {
+    this.attackCooldown -= delta
+
+    if (this.stamina <= 0) {
+      this.isActive = false
+    }
+
+    if (!this.isActive) {
+      this.stamina = Math.min(
+        this.maxStamina,
+        this.stamina + (this.staminaRegen * delta) / 1000
+      )
+      if (this.stamina > 20) this.isActive = true
+      this.updateStaminaBar()
+      return
+    }
+
+    const target = this.findTarget(enemies)
+    if (target && this.attackCooldown <= 0) {
+      this.attack(target)
+      this.stamina -= 5
+      this.attackCooldown = 1000 / this.attackSpeed
+      this.updateStaminaBar()
+    } else if (!target) {
+      this.stamina = Math.min(
+        this.maxStamina,
+        this.stamina + (this.staminaRegen * delta) / 1000
+      )
+      this.updateStaminaBar()
+    }
+  }
+
+  protected findTarget(enemies: EnemyBase[]): EnemyBase | null {
+    const rangePx = this.attackRange * TILE_SIZE
+    let best: EnemyBase | null = null
+    let bestProgress = -1
+
+    for (const e of enemies) {
+      if (e.isDead) continue
+      const dx = e.sprite.x - this.px
+      const dy = e.sprite.y - this.py
+      const dist = Math.sqrt(dx * dx + dy * dy)
+      if (dist <= rangePx) {
+        // 优先选取路径进度最深的（模拟血量最多/威胁最大）
+        const progress = e.pathProgress
+        if (progress > bestProgress) {
+          bestProgress = progress
+          best = e
+        }
+      }
+    }
+    return best
+  }
+
+  protected updateStaminaBar(): void {
+    this.staminaBar.clear()
+    const bw = 40
+    const bh = 4
+    const bx = this.px - bw / 2
+    const by = this.py + TILE_SIZE / 2 - 8
+
+    this.staminaBar.fillStyle(0x374151, 1)
+    this.staminaBar.fillRect(bx, by, bw, bh)
+    this.staminaBar.fillStyle(0xf59e0b, 1)
+    this.staminaBar.fillRect(bx, by, bw * (this.stamina / this.maxStamina), bh)
+    this.staminaBar.setDepth(11)
+  }
+
+  buyCoffee(): boolean {
+    const manager = GameManager.getInstance()
+    if (manager.spendHC(COFFEE_COST)) {
+      this.stamina = this.maxStamina
+      this.isActive = true
+      this.updateStaminaBar()
+      return true
+    }
+    return false
+  }
+
+  getPixelCenter(): { x: number; y: number } {
+    return { x: this.px, y: this.py }
+  }
+
+  abstract attack(target: EnemyBase): void
+  abstract drawSprite(): void
+
+  destroy(): void {
+    this.sprite?.destroy()
+    this.staminaBar?.destroy()
+  }
+}
diff --git a/game/towers/TowerManager.ts b/game/towers/TowerManager.ts
new file mode 100644
index 0000000..5832010
--- /dev/null
+++ b/game/towers/TowerManager.ts
@@ -0,0 +1,246 @@
+import type Phaser from 'phaser'
+import { GameManager } from '../GameManager'
+import { TILE_SIZE, HUD_HEIGHT, COFFEE_COST } from '../constants'
+import { PATH_TILES } from '../mapRenderer'
+import type { EnemyBase } from '../enemies/EnemyBase'
+import { TowerBase } from './TowerBase'
+import { InternTower } from './InternTower'
+import { SeniorDevTower } from './SeniorDevTower'
+import { PPTMasterTower } from './PPTMasterTower'
+import { HRBPTower } from './HRBPTower'
+
+export type TowerType = 'intern' | 'senior' | 'ppt' | 'hrbp'
+
+export const TOWER_COSTS: Record<TowerType, number> = {
+  intern: 50,
+  senior: 120,
+  ppt: 100,
+  hrbp: 80,
+}
+
+export class TowerManager {
+  private scene: Phaser.Scene
+  private towers: TowerBase[] = []
+  private occupiedCells: Set<string> = new Set()
+  private infoLabel: Phaser.GameObjects.Text | null = null
+
+  constructor(scene: Phaser.Scene) {
+    this.scene = scene
+  }
+
+  canPlace(gridX: number, gridY: number): boolean {
+    const key = `${gridX},${gridY}`
+    return !PATH_TILES.has(key) && !this.occupiedCells.has(key)
+  }
+
+  placeTower(gridX: number, gridY: number, type: TowerType): boolean {
+    if (!this.canPlace(gridX, gridY)) return false
+
+    const cost = TOWER_COSTS[type]
+    const manager = GameManager.getInstance()
+    if (!manager.spendHC(cost)) return false
+
+    const tower = this.createTower(type, gridX, gridY)
+    this.towers.push(tower)
+    this.occupiedCells.add(`${gridX},${gridY}`)
+
+    // 监听实习生自毁事件
+    if (tower instanceof InternTower) {
+      tower.onSelfDestroy = (t) => this.removeTower(t)
+    }
+
+    return true
+  }
+
+  private createTower(type: TowerType, gridX: number, gridY: number): TowerBase {
+    switch (type) {
+      case 'senior':
+        return new SeniorDevTower(this.scene, gridX, gridY)
+      case 'ppt':
+        return new PPTMasterTower(this.scene, gridX, gridY)
+      case 'hrbp':
+        return new HRBPTower(this.scene, gridX, gridY)
+      default:
+        return new InternTower(this.scene, gridX, gridY)
+    }
+  }
+
+  update(delta: number, enemies: EnemyBase[]): void {
+    // 更新 HRBP 的周围塔列表
+    for (const tower of this.towers) {
+      if (tower instanceof HRBPTower) {
+        const nearby = this.getTowersNear(tower.gridX, tower.gridY, 1, tower)
+        tower.setNearbyTowers(nearby)
+      }
+    }
+
+    for (const tower of this.towers) {
+      if (tower instanceof PPTMasterTower) {
+        // PPT 大师特殊更新：如果可以攻击就 AOE
+        this.updatePPTTower(tower, delta, enemies)
+      } else {
+        tower.update(delta, enemies)
+      }
+    }
+  }
+
+  private updatePPTTower(
+    tower: PPTMasterTower,
+    delta: number,
+    enemies: EnemyBase[]
+  ): void {
+    // 直接调用 super 逻辑（手动处理冷却）
+    tower['attackCooldown'] -= delta
+
+    if (tower['stamina'] <= 0) tower['isActive'] = false
+
+    if (!tower['isActive']) {
+      tower['stamina'] = Math.min(
+        tower.maxStamina,
+        tower['stamina'] + (tower['staminaRegen'] * delta) / 1000
+      )
+      if (tower['stamina'] > 20) tower['isActive'] = true
+      tower['updateStaminaBar']()
+      return
+    }
+
+    const hasTarget = enemies.some((e) => {
+      if (e.isDead) return false
+      const dx = e.sprite.x - tower['px']
+      const dy = e.sprite.y - tower['py']
+      return Math.sqrt(dx * dx + dy * dy) <= tower.attackRange * TILE_SIZE
+    })
+
+    if (hasTarget && tower['attackCooldown'] <= 0) {
+      tower.attackAoe(enemies)
+      tower['stamina'] -= 5
+      tower['attackCooldown'] = 1000 / tower.attackSpeed
+      tower['updateStaminaBar']()
+    } else if (!hasTarget) {
+      tower['stamina'] = Math.min(
+        tower.maxStamina,
+        tower['stamina'] + (tower['staminaRegen'] * delta) / 1000
+      )
+      tower['updateStaminaBar']()
+    }
+  }
+
+  private getTowersNear(
+    gx: number,
+    gy: number,
+    range: number,
+    exclude: TowerBase
+  ): TowerBase[] {
+    return this.towers.filter(
+      (t) =>
+        t !== exclude &&
+        Math.abs(t.gridX - gx) <= range &&
+        Math.abs(t.gridY - gy) <= range
+    )
+  }
+
+  /** 点击格子时检查是否有塔，显示信息 */
+  handleTileClick(gridX: number, gridY: number): boolean {
+    const tower = this.getTowerAt(gridX, gridY)
+    if (!tower) return false
+    this.showTowerInfo(tower)
+    return true
+  }
+
+  private showTowerInfo(tower: TowerBase): void {
+    this.infoLabel?.destroy()
+
+    const px = tower.gridX * TILE_SIZE + TILE_SIZE / 2
+    const py = tower.gridY * TILE_SIZE + TILE_SIZE / 2 + HUD_HEIGHT
+
+    const label = this.scene.add
+      .text(
+        px,
+        py - 40,
+        `精力: ${Math.floor(tower.stamina)}%  [点击购买咖啡 ${COFFEE_COST}HC]`,
+        {
+          fontFamily: 'VT323, monospace',
+          fontSize: '14px',
+          color: '#F59E0B',
+          backgroundColor: '#0A1628',
+          padding: { x: 6, y: 3 },
+        }
+      )
+      .setOrigin(0.5, 1)
+      .setDepth(30)
+      .setInteractive()
+
+    label.on('pointerdown', () => {
+      const ok = tower.buyCoffee()
+      if (ok) {
+        label.setText(`☕ 喝了咖啡！精力满了！`)
+        this.scene.time.delayedCall(1000, () => label.destroy())
+      } else {
+        label.setText('HC 不足！')
+        this.scene.time.delayedCall(800, () => label.destroy())
+      }
+    })
+
+    this.infoLabel = label
+    this.scene.time.delayedCall(3000, () => {
+      if (this.infoLabel === label) this.infoLabel = null
+      label.destroy()
+    })
+  }
+
+  getTowerAt(gridX: number, gridY: number): TowerBase | null {
+    return (
+      this.towers.find((t) => t.gridX === gridX && t.gridY === gridY) ?? null
+    )
+  }
+
+  removeTower(tower: TowerBase): void {
+    const idx = this.towers.indexOf(tower)
+    if (idx !== -1) {
+      this.towers.splice(idx, 1)
+      this.occupiedCells.delete(`${tower.gridX},${tower.gridY}`)
+    }
+  }
+
+  removeRandomTower(): void {
+    if (this.towers.length === 0) return
+    const idx = Math.floor(Math.random() * this.towers.length)
+    const tower = this.towers[idx]
+    this.showDestroyEffect(tower)
+    tower.destroy()
+    this.removeTower(tower)
+  }
+
+  private showDestroyEffect(tower: TowerBase): void {
+    const { x, y } = tower.getPixelCenter()
+    const txt = this.scene.add
+      .text(x, y - 20, '☠ 组织架构调整！被裁了！', {
+        fontFamily: 'VT323, monospace',
+        fontSize: '16px',
+        color: '#EF4444',
+        backgroundColor: '#7F1D1D',
+        padding: { x: 6, y: 3 },
+      })
+      .setOrigin(0.5, 1)
+      .setDepth(30)
+    this.scene.tweens.add({
+      targets: txt,
+      y: y - 60,
+      alpha: 0,
+      duration: 2000,
+      onComplete: () => txt.destroy(),
+    })
+  }
+
+  getAllTowers(): TowerBase[] {
+    return this.towers
+  }
+
+  hasTowerAt(gridX: number, gridY: number): boolean {
+    return this.occupiedCells.has(`${gridX},${gridY}`)
+  }
+
+  getOccupiedCells(): Set<string> {
+    return this.occupiedCells
+  }
+}