diff --git a/src/client/ClientGameRunner.ts b/src/client/ClientGameRunner.ts
index 13e204b62..dce0b402e 100644
--- a/src/client/ClientGameRunner.ts
+++ b/src/client/ClientGameRunner.ts
@@ -1,5 +1,5 @@
 import { Executor } from "../core/execution/ExecutionManager";
-import { Cell, MutableGame, PlayerID, GameMap, Difficulty, GameType } from "../core/game/Game";
+import { Cell, MutableGame, PlayerID, GameMapType, Difficulty, GameType } from "../core/game/Game";
 import { createGame } from "../core/game/GameImpl";
 import { EventBus } from "../core/EventBus";
 import { createRenderer, GameRenderer } from "./graphics/GameRenderer";
@@ -23,7 +23,7 @@ export interface LobbyConfig {
     persistentID: string,
     gameType: GameType
     gameID: GameID,
-    map: GameMap | null
+    map: GameMapType | null
     difficulty: Difficulty | null
 }
 
diff --git a/src/client/HostLobbyModal.ts b/src/client/HostLobbyModal.ts
index 26177edb9..c5fd65104 100644
--- a/src/client/HostLobbyModal.ts
+++ b/src/client/HostLobbyModal.ts
@@ -1,13 +1,13 @@
 import { LitElement, html, css } from 'lit';
 import { customElement, property, state } from 'lit/decorators.js';
-import { Difficulty, GameMap, GameType } from '../core/game/Game';
+import { Difficulty, GameMapType, GameType } from '../core/game/Game';
 import { Lobby } from '../core/Schemas';
 import { consolex } from '../core/Consolex';
 
 @customElement('host-lobby-modal')
 export class HostLobbyModal extends LitElement {
   @state() private isModalOpen = false;
-  @state() private selectedMap: GameMap = GameMap.World;
+  @state() private selectedMap: GameMapType = GameMapType.World;
   @state() private selectedDiffculty: Difficulty = Difficulty.Medium;
   @state() private lobbyId = '';
   @state() private copySuccess = false;
@@ -116,7 +116,7 @@ export class HostLobbyModal extends LitElement {
           <div>
             <label for="map-select">Map: </label>
             <select id="map-select" @change=${this.handleMapChange}>
-              ${Object.entries(GameMap)
+              ${Object.entries(GameMapType)
         .filter(([key]) => isNaN(Number(key)))
         .map(([key, value]) => html`
                   <option value=${value} ?selected=${this.selectedMap === value}>
@@ -179,7 +179,7 @@ export class HostLobbyModal extends LitElement {
   }
 
   private async handleMapChange(e: Event) {
-    this.selectedMap = String((e.target as HTMLSelectElement).value) as GameMap;
+    this.selectedMap = String((e.target as HTMLSelectElement).value) as GameMapType;
     consolex.log(`updating map to ${this.selectedMap}`)
     this.putGameConfig()
   }
@@ -201,7 +201,7 @@ export class HostLobbyModal extends LitElement {
   }
 
   private async startGame() {
-    consolex.log(`Starting private game with map: ${GameMap[this.selectedMap]}`);
+    consolex.log(`Starting private game with map: ${GameMapType[this.selectedMap]}`);
     this.close();
     const response = await fetch(`/start_private_lobby/${this.lobbyId}`, {
       method: 'POST',
diff --git a/src/client/JoinPrivateLobbyModal.ts b/src/client/JoinPrivateLobbyModal.ts
index b6ca30ead..f370bf666 100644
--- a/src/client/JoinPrivateLobbyModal.ts
+++ b/src/client/JoinPrivateLobbyModal.ts
@@ -1,6 +1,6 @@
 import { LitElement, html, css } from 'lit';
 import { customElement, property, state, query } from 'lit/decorators.js';
-import { GameMap, GameType } from '../core/game/Game';
+import { GameMapType, GameType } from '../core/game/Game';
 import { consolex } from '../core/Consolex';
 
 @customElement('join-private-lobby-modal')
@@ -174,7 +174,7 @@ export class JoinPrivateLobbyModal extends LitElement {
             detail: {
               lobby: { id: lobbyId },
               gameType: GameType.Private,
-              map: GameMap.World,
+              map: GameMapType.World,
             },
             bubbles: true,
             composed: true
diff --git a/src/client/PublicLobby.ts b/src/client/PublicLobby.ts
index b799070b6..66431a749 100644
--- a/src/client/PublicLobby.ts
+++ b/src/client/PublicLobby.ts
@@ -1,7 +1,7 @@
 import { LitElement, html, css } from 'lit';
 import { customElement, state } from 'lit/decorators.js';
 import { Lobby } from "../core/Schemas";
-import { Difficulty, GameMap, GameType } from '../core/game/Game';
+import { Difficulty, GameMapType, GameType } from '../core/game/Game';
 import { consolex } from '../core/Consolex';
 
 @customElement('public-lobby')
@@ -113,7 +113,7 @@ export class PublicLobby extends LitElement {
                 detail: {
                     lobby: lobby,
                     gameType: GameType.Public,
-                    map: GameMap.World,
+                    map: GameMapType.World,
                     difficulty: Difficulty.Medium,
                 },
                 bubbles: true,
diff --git a/src/client/SinglePlayerModal.ts b/src/client/SinglePlayerModal.ts
index d24584ab9..b03d0aeed 100644
--- a/src/client/SinglePlayerModal.ts
+++ b/src/client/SinglePlayerModal.ts
@@ -1,13 +1,13 @@
 import { LitElement, html, css } from 'lit';
 import { customElement, property, state } from 'lit/decorators.js';
-import { Difficulty, GameMap, GameType } from '../core/game/Game';
+import { Difficulty, GameMapType, GameType } from '../core/game/Game';
 import { generateID as generateID } from '../core/Util';
 import { consolex } from '../core/Consolex';
 
 @customElement('single-player-modal')
 export class SinglePlayerModal extends LitElement {
   @state() private isModalOpen = false;
-  @state() private selectedMap: GameMap = GameMap.World;
+  @state() private selectedMap: GameMapType = GameMapType.World;
   @state() private selectedDifficulty: Difficulty = Difficulty.Medium;
 
   static styles = css`
@@ -81,7 +81,7 @@ export class SinglePlayerModal extends LitElement {
           <div>
             <label for="map-select">Map: </label>
             <select id="map-select" @change=${this.handleMapChange}>
-              ${Object.entries(GameMap)
+              ${Object.entries(GameMapType)
         .filter(([key]) => isNaN(Number(key)))
         .map(([key, value]) => html`
                   <option value=${value} ?selected=${this.selectedMap === value}>
@@ -118,13 +118,13 @@ export class SinglePlayerModal extends LitElement {
   }
 
   private handleMapChange(e: Event) {
-    this.selectedMap = String((e.target as HTMLSelectElement).value) as GameMap;
+    this.selectedMap = String((e.target as HTMLSelectElement).value) as GameMapType;
   }
   private handleDifficultyChange(e: Event) {
     this.selectedDifficulty = String((e.target as HTMLSelectElement).value) as Difficulty;
   }
   private startGame() {
-    consolex.log(`Starting single player game with map: ${GameMap[this.selectedMap]}`);
+    consolex.log(`Starting single player game with map: ${GameMapType[this.selectedMap]}`);
     this.dispatchEvent(new CustomEvent('join-lobby', {
       detail: {
         gameType: GameType.Singleplayer,
diff --git a/src/core/Schemas.ts b/src/core/Schemas.ts
index 61b675e7b..35c22739e 100644
--- a/src/core/Schemas.ts
+++ b/src/core/Schemas.ts
@@ -1,5 +1,5 @@
 import { z } from 'zod';
-import { AllPlayers, Difficulty, GameMap, GameType, PlayerType, UnitType } from './game/Game';
+import { AllPlayers, Difficulty, GameMapType, GameType, PlayerType, UnitType } from './game/Game';
 
 export type GameID = string
 export type ClientID = string
@@ -65,7 +65,7 @@ export interface Lobby {
 }
 
 const GameConfigSchema = z.object({
-    gameMap: z.nativeEnum(GameMap),
+    gameMap: z.nativeEnum(GameMapType),
     difficulty: z.nativeEnum(Difficulty),
     gameType: z.nativeEnum(GameType)
 })
diff --git a/src/core/game/Game.ts b/src/core/game/Game.ts
index 88382ba83..d3eb0df9a 100644
--- a/src/core/game/Game.ts
+++ b/src/core/game/Game.ts
@@ -29,7 +29,7 @@ export enum Difficulty {
     Impossible = "Impossible",
 }
 
-export enum GameMap {
+export enum GameMapType {
     World = "World",
     Europe = "Europe",
     Mena = "Mena",
diff --git a/src/core/game/GameMap.ts b/src/core/game/GameMap.ts
index baec41eac..168b2b191 100644
--- a/src/core/game/GameMap.ts
+++ b/src/core/game/GameMap.ts
@@ -3,42 +3,36 @@ import { TerrainType } from "./Game";
 export type TileRef = number;
 
 export class GameMap {
-    private tiles: bigint[] = [];
-    private width_: number;
-    private height_: number;
-    private numLandTiles_: number = 0;
+    private readonly terrain: Uint8Array;     // Immutable terrain data
+    private readonly state: Uint16Array;      // Mutable game state
+    private readonly width_: number;
+    private readonly height_: number;
 
-    // Bit positions for tile data
-    private static readonly FALLOUT_BIT = 0n;
-    private static readonly OCEAN_BIT = 1n;
-    private static readonly SHORELINE_BIT = 2n;
-    private static readonly IS_LAND_BIT = 3n;
-    private static readonly IS_BORDER_BIT = 4n;
-    private static readonly HAS_DEFENSE_BONUS_BIT = 5n;
+    // Terrain bits (Uint8Array)
+    private static readonly IS_LAND_BIT = 0;
+    private static readonly SHORELINE_BIT = 1;
+    private static readonly OCEAN_BIT = 2;
+    private static readonly MAGNITUDE_OFFSET = 3;  // Uses bits 3-7 (5 bits)
+    private static readonly MAGNITUDE_MASK = 0x1F; // 11111 in binary
 
-    private static readonly MAGNITUDE_OFFSET = 8n;
-    private static readonly MAGNITUDE_BITS = 5n;
-    private static readonly MAGNITUDE_MASK = (1n << GameMap.MAGNITUDE_BITS) - 1n;
+    // State bits (Uint16Array)
+    private static readonly PLAYER_ID_OFFSET = 0;  // Uses bits 0-11 (12 bits)
+    private static readonly PLAYER_ID_MASK = 0xFFF;
+    private static readonly FALLOUT_BIT = 12;
+    private static readonly BORDER_BIT = 13;
+    private static readonly DEFENSE_BONUS_BIT = 14;
+    // Bit 15 still reserved
 
-    private static readonly PLAYER_ID_OFFSET = 13n;
-    private static readonly PLAYER_ID_BITS = 12n;
-    private static readonly PLAYER_ID_MASK = (1n << GameMap.PLAYER_ID_BITS) - 1n;
-
-    private static readonly X_COORD_OFFSET = 25n;
-    private static readonly X_COORD_BITS = 12n;
-    private static readonly X_COORD_MASK = (1n << GameMap.X_COORD_BITS) - 1n;
-
-    private static readonly Y_COORD_OFFSET = 37n;
-    private static readonly Y_COORD_BITS = 12n;
-    private static readonly Y_COORD_MASK = (1n << GameMap.Y_COORD_BITS) - 1n;
-
-    constructor(width: number, height: number) {
+    constructor(width: number, height: number, terrainData: Uint8Array, private numLandTiles_: number) {
+        if (terrainData.length !== width * height) {
+            throw new Error(`Terrain data length ${terrainData.length} doesn't match dimensions ${width}x${height}`);
+        }
         this.width_ = width;
         this.height_ = height;
-        this.tiles = new Array(width * height).fill(0n);
+        this.terrain = terrainData;
+        this.state = new Uint16Array(width * height);
     }
 
-    // Get reference from coordinates
     ref(x: number, y: number): TileRef {
         if (!this.isValidCoord(x, y)) {
             throw new Error(`Invalid coordinates: ${x},${y}`);
@@ -46,79 +40,85 @@ export class GameMap {
         return y * this.width_ + x;
     }
 
-    // Basic properties
+    x(ref: TileRef): number {
+        return ref % this.width_;
+    }
+
+    y(ref: TileRef): number {
+        return Math.floor(ref / this.width_);
+    }
+
     width(): number { return this.width_; }
     height(): number { return this.height_; }
     numLandTiles(): number { return this.numLandTiles_; }
 
-    // Coordinate validation
     isValidCoord(x: number, y: number): boolean {
         return x >= 0 && x < this.width_ && y >= 0 && y < this.height_;
     }
 
-    // Get coordinates from reference
-    x(ref: TileRef): number {
-        return Number((this.tiles[ref] >> GameMap.X_COORD_OFFSET) & GameMap.X_COORD_MASK);
-    }
-
-    y(ref: TileRef): number {
-        return Number((this.tiles[ref] >> GameMap.Y_COORD_OFFSET) & GameMap.Y_COORD_MASK);
-    }
-
-    // Tile property getters
-    playerId(ref: TileRef): number {
-        return Number((this.tiles[ref] >> GameMap.PLAYER_ID_OFFSET) & GameMap.PLAYER_ID_MASK);
-    }
-
-    magnitude(ref: TileRef): number {
-        return Number((this.tiles[ref] >> GameMap.MAGNITUDE_OFFSET) & GameMap.MAGNITUDE_MASK);
-    }
-
+    // Terrain getters (immutable)
     isLand(ref: TileRef): boolean {
-        return Boolean(this.tiles[ref] & (1n << GameMap.IS_LAND_BIT));
+        return Boolean(this.terrain[ref] & (1 << GameMap.IS_LAND_BIT));
     }
 
     isOcean(ref: TileRef): boolean {
-        return Boolean(this.tiles[ref] & (1n << GameMap.OCEAN_BIT));
+        return Boolean(this.terrain[ref] & (1 << GameMap.OCEAN_BIT));
     }
 
     isShoreline(ref: TileRef): boolean {
-        return Boolean(this.tiles[ref] & (1n << GameMap.SHORELINE_BIT));
+        return Boolean(this.terrain[ref] & (1 << GameMap.SHORELINE_BIT));
+    }
+
+    magnitude(ref: TileRef): number {
+        return (this.terrain[ref] >> GameMap.MAGNITUDE_OFFSET) & GameMap.MAGNITUDE_MASK;
+    }
+
+    // State getters and setters (mutable)
+    playerId(ref: TileRef): number {
+        return this.state[ref] & GameMap.PLAYER_ID_MASK;
+    }
+
+    setPlayerId(ref: TileRef, playerId: number): void {
+        if (playerId > GameMap.PLAYER_ID_MASK) {
+            throw new Error(`Player ID ${playerId} exceeds maximum value ${GameMap.PLAYER_ID_MASK}`);
+        }
+        this.state[ref] = (this.state[ref] & ~GameMap.PLAYER_ID_MASK) | playerId;
     }
 
     hasFallout(ref: TileRef): boolean {
-        return Boolean(this.tiles[ref] & (1n << GameMap.FALLOUT_BIT));
+        return Boolean(this.state[ref] & (1 << GameMap.FALLOUT_BIT));
+    }
+
+    setFallout(ref: TileRef, value: boolean): void {
+        if (value) {
+            this.state[ref] |= 1 << GameMap.FALLOUT_BIT;
+        } else {
+            this.state[ref] &= ~(1 << GameMap.FALLOUT_BIT);
+        }
     }
 
     isBorder(ref: TileRef): boolean {
-        return Boolean(this.tiles[ref] & (1n << GameMap.IS_BORDER_BIT));
-    }
-
-    hasDefenseBonus(ref: TileRef): boolean {
-        return Boolean(this.tiles[ref] & (1n << GameMap.HAS_DEFENSE_BONUS_BIT));
-    }
-
-    // Tile property setters
-    setFallout(ref: TileRef, value: boolean): void {
-        if (value) {
-            this.tiles[ref] |= 1n << GameMap.FALLOUT_BIT;
-        } else {
-            this.tiles[ref] &= ~(1n << GameMap.FALLOUT_BIT);
-        }
+        return Boolean(this.state[ref] & (1 << GameMap.BORDER_BIT));
     }
 
     setBorder(ref: TileRef, value: boolean): void {
         if (value) {
-            this.tiles[ref] |= 1n << GameMap.IS_BORDER_BIT;
+            this.state[ref] |= 1 << GameMap.BORDER_BIT;
         } else {
-            this.tiles[ref] &= ~(1n << GameMap.IS_BORDER_BIT);
+            this.state[ref] &= ~(1 << GameMap.BORDER_BIT);
         }
     }
 
-    setPlayerId(ref: TileRef, playerId: number): void {
-        const mask = GameMap.PLAYER_ID_MASK << GameMap.PLAYER_ID_OFFSET;
-        this.tiles[ref] = (this.tiles[ref] & ~mask) |
-            ((BigInt(playerId) & GameMap.PLAYER_ID_MASK) << GameMap.PLAYER_ID_OFFSET);
+    hasDefenseBonus(ref: TileRef): boolean {
+        return Boolean(this.state[ref] & (1 << GameMap.DEFENSE_BONUS_BIT));
+    }
+
+    setDefenseBonus(ref: TileRef, value: boolean): void {
+        if (value) {
+            this.state[ref] |= 1 << GameMap.DEFENSE_BONUS_BIT;
+        } else {
+            this.state[ref] &= ~(1 << GameMap.DEFENSE_BONUS_BIT);
+        }
     }
 
     // Helper methods
@@ -148,62 +148,15 @@ export class GameMap {
         return this.isOcean(ref) ? TerrainType.Ocean : TerrainType.Lake;
     }
 
-    // Get neighboring tiles
     neighbors(ref: TileRef): TileRef[] {
-        const x = this.x(ref);
-        const y = this.y(ref);
+        const neighbors: TileRef[] = [];
+        const w = this.width_;
 
-        return [
-            { x: x - 1, y },
-            { x: x + 1, y },
-            { x, y: y - 1 },
-            { x, y: y + 1 }
-        ]
-            .filter(pos => this.isValidCoord(pos.x, pos.y))
-            .map(pos => this.ref(pos.x, pos.y));
+        if (ref >= w) neighbors.push(ref - w);
+        if (ref < (this.height_ - 1) * w) neighbors.push(ref + w);
+        if (ref % w !== 0) neighbors.push(ref - 1);
+        if (ref % w !== w - 1) neighbors.push(ref + 1);
+
+        return neighbors;
     }
-
-    // Method to set initial tile data
-    setTile(
-        ref: TileRef,
-        x: number,
-        y: number,
-        playerId: number,
-        magnitude: number,
-        isLand: boolean = false,
-        isOcean: boolean = false,
-        hasFallout: boolean = false,
-        isShoreline: boolean = false,
-        isBorder: boolean = false,
-        hasDefenseBonus: boolean = false
-    ): void {
-        let tile = 0n;
-
-        // Set coordinates
-        tile |= (BigInt(x) & GameMap.X_COORD_MASK) << GameMap.X_COORD_OFFSET;
-        tile |= (BigInt(y) & GameMap.Y_COORD_MASK) << GameMap.Y_COORD_OFFSET;
-
-        // Set player ID
-        tile |= (BigInt(playerId) & GameMap.PLAYER_ID_MASK) << GameMap.PLAYER_ID_OFFSET;
-
-        // Set magnitude
-        tile |= (BigInt(magnitude) & GameMap.MAGNITUDE_MASK) << GameMap.MAGNITUDE_OFFSET;
-
-        // Set boolean flags
-        if (hasFallout) tile |= 1n << GameMap.FALLOUT_BIT;
-        if (isOcean) tile |= 1n << GameMap.OCEAN_BIT;
-        if (isShoreline) tile |= 1n << GameMap.SHORELINE_BIT;
-        if (isLand) {
-            tile |= 1n << GameMap.IS_LAND_BIT;
-            this.numLandTiles_++;
-        }
-        if (isBorder) tile |= 1n << GameMap.IS_BORDER_BIT;
-        if (hasDefenseBonus) tile |= 1n << GameMap.HAS_DEFENSE_BONUS_BIT;
-
-        this.tiles[ref] = tile;
-    }
-}
-
-export function createGameMap(width: number, height: number): GameMap {
-    return new GameMap(width, height);
 }
\ No newline at end of file
diff --git a/src/core/game/TerrainMapFileLoader.ts b/src/core/game/TerrainMapFileLoader.ts
index 82d29a30e..e0cbc751c 100644
--- a/src/core/game/TerrainMapFileLoader.ts
+++ b/src/core/game/TerrainMapFileLoader.ts
@@ -1,4 +1,4 @@
-import { Cell, GameMap, TerrainMap, TerrainTile, TerrainType } from './Game';
+import { Cell, GameMapType, TerrainMap, TerrainTile, TerrainType } from './Game';
 import { consolex } from '../Consolex';
 import { NationMap } from './TerrainMapLoader';
 
@@ -23,25 +23,25 @@ interface NationMapModule {
 }
 
 // Mapping from GameMap enum values to file names
-const MAP_FILE_NAMES: Record<GameMap, string> = {
-    [GameMap.World]: 'WorldMap',
-    [GameMap.Europe]: 'Europe',
-    [GameMap.Mena]: 'Mena',
-    [GameMap.NorthAmerica]: 'NorthAmerica',
-    [GameMap.Oceania]: 'Oceania',
-    [GameMap.BlackSea]: 'BlackSea',
+const MAP_FILE_NAMES: Record<GameMapType, string> = {
+    [GameMapType.World]: 'WorldMap',
+    [GameMapType.Europe]: 'Europe',
+    [GameMapType.Mena]: 'Mena',
+    [GameMapType.NorthAmerica]: 'NorthAmerica',
+    [GameMapType.Oceania]: 'Oceania',
+    [GameMapType.BlackSea]: 'BlackSea',
 };
 
 class GameMapLoader {
-    private maps: Map<GameMap, MapCache>;
-    private loadingPromises: Map<GameMap, Promise<MapData>>;
+    private maps: Map<GameMapType, MapCache>;
+    private loadingPromises: Map<GameMapType, Promise<MapData>>;
 
     constructor() {
-        this.maps = new Map<GameMap, MapCache>();
-        this.loadingPromises = new Map<GameMap, Promise<MapData>>();
+        this.maps = new Map<GameMapType, MapCache>();
+        this.loadingPromises = new Map<GameMapType, Promise<MapData>>();
     }
 
-    public async getMapData(map: GameMap): Promise<MapData> {
+    public async getMapData(map: GameMapType): Promise<MapData> {
         const cachedMap = this.maps.get(map);
         if (cachedMap?.bin && cachedMap?.nationMap) {
             return cachedMap as MapData;
@@ -56,7 +56,7 @@ class GameMapLoader {
         return data;
     }
 
-    private async loadMapData(map: GameMap): Promise<MapData> {
+    private async loadMapData(map: GameMapType): Promise<MapData> {
         const fileName = MAP_FILE_NAMES[map];
         if (!fileName) {
             throw new Error(`No file name mapping found for map: ${map}`);
@@ -75,12 +75,12 @@ class GameMapLoader {
         };
     }
 
-    public isMapLoaded(map: GameMap): boolean {
+    public isMapLoaded(map: GameMapType): boolean {
         const mapData = this.maps.get(map);
         return !!mapData?.bin && !!mapData?.nationMap;
     }
 
-    public getLoadedMaps(): GameMap[] {
+    public getLoadedMaps(): GameMapType[] {
         return Array.from(this.maps.keys()).filter(map => this.isMapLoaded(map));
     }
 }
diff --git a/src/core/game/TerrainMapLoader.ts b/src/core/game/TerrainMapLoader.ts
index e4bcd01dc..7e19a775d 100644
--- a/src/core/game/TerrainMapLoader.ts
+++ b/src/core/game/TerrainMapLoader.ts
@@ -27,7 +27,7 @@ export class TerrainTileImpl implements TerrainTile {
     constructor(private map: TerrainMap, public _type: TerrainType, private _cell: Cell) { }
 
     key(): string {
-        return this._cell.toString()
+        throw new Error('Method not implemented.');
     }
 
     equals(other: TerrainTile): boolean {
diff --git a/src/server/GameManager.ts b/src/server/GameManager.ts
index 615a577e0..68ba3c32a 100644
--- a/src/server/GameManager.ts
+++ b/src/server/GameManager.ts
@@ -3,7 +3,7 @@ import { ClientID, GameConfig, GameID } from "../core/Schemas";
 import { v4 as uuidv4 } from 'uuid';
 import { Client } from "./Client";
 import { GamePhase, GameServer } from "./GameServer";
-import { Difficulty, GameMap, GameType } from "../core/game/Game";
+import { Difficulty, GameMapType, GameType } from "../core/game/Game";
 import { generateID } from "../core/Util";
 
 
@@ -50,7 +50,7 @@ export class GameManager {
             false,
             this.config,
             {
-                gameMap: GameMap.World,
+                gameMap: GameMapType.World,
                 gameType: GameType.Private,
                 difficulty: Difficulty.Medium
             }
@@ -88,7 +88,7 @@ export class GameManager {
                 true,
                 this.config,
                 {
-                    gameMap: GameMap.World,
+                    gameMap: GameMapType.World,
                     gameType: GameType.Public,
                     difficulty: Difficulty.Medium
                 }