diff --git a/src/modules/biomes.ts b/src/modules/biomes.ts
index ba6e58a9..321ea77a 100644
--- a/src/modules/biomes.ts
+++ b/src/modules/biomes.ts
@@ -1,24 +1,8 @@
 import { range, mean } from "d3";
 import { rn } from "../utils";
-import { PackedGraph } from "./PackedGraph";
 
 declare global {
   var Biomes: BiomesModule;
-
-  var pack: PackedGraph;
-  var grid: any;
-  var TIME: boolean;
-
-  var biomesData: {
-    i: number[];
-    name: string[];
-    color: string[];
-    biomesMartix: Uint8Array[];
-    habitability: number[];
-    iconsDensity: number[];
-    icons: string[][];
-    cost: number[];
-  };
 }
 
 class BiomesModule {
@@ -74,7 +58,7 @@ class BiomesModule {
       {swamp: 1}
     ];
     const cost: number[] = [10, 200, 150, 60, 50, 70, 70, 80, 90, 200, 1000, 5000, 150]; // biome movement cost
-    const biomesMartix: Uint8Array[] = [
+    const biomesMatrix: Uint8Array[] = [
       // hot ↔ cold [>19°C; <-4°C]; dry ↕ wet
       new Uint8Array([1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 10]),
       new Uint8Array([3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 9, 9, 9, 9, 10, 10, 10]),
@@ -95,7 +79,7 @@ class BiomesModule {
       parsedIcons[i] = parsed;
     }
 
-    return {i: range(0, name.length), name, color, biomesMartix, habitability, iconsDensity, icons: parsedIcons, cost};
+    return {i: range(0, name.length), name, color, biomesMatrix, habitability, iconsDensity, icons: parsedIcons, cost};
   };
 
   define() {
@@ -135,7 +119,7 @@ class BiomesModule {
     // in other cases use biome matrix
     const moistureBand = Math.min((moisture / 5) | 0, 4); // [0-4]
     const temperatureBand = Math.min(Math.max(20 - temperature, 0), 25); // [0-25]
-    return biomesData.biomesMartix[moistureBand][temperatureBand];
+    return biomesData.biomesMatrix[moistureBand][temperatureBand];
   }
 
   private isWetland(moisture: number, temperature: number, height: number) {
diff --git a/src/modules/features.ts b/src/modules/features.ts
index e6b935c6..c85931f3 100644
--- a/src/modules/features.ts
+++ b/src/modules/features.ts
@@ -1,18 +1,9 @@
 import { clipPoly, connectVertices, createTypedArray, distanceSquared, isLand, isWater, rn, TYPED_ARRAY_MAX_VALUES,unique } from "../utils";
 import Alea from "alea";
 import { polygonArea } from "d3";
-import { LakesModule } from "./lakes";
-import { PackedGraph } from "./PackedGraph";
 
 declare global {
-  interface Window {
-    Features: any;
-  }
-  var TIME: boolean;
-  var Lakes: LakesModule;
-  var grid: any;
-  var pack: PackedGraph;
-  var seed: string;
+  var Features: FeatureModule;
 }
 
 type FeatureType = "ocean" | "lake" | "island";
@@ -58,18 +49,6 @@ class FeatureModule {
   private WATER_COAST = -1;
   private DEEP_WATER = -2;
 
-  private get grid() {
-    return grid;
-  }
-
-  private get packedGraph() {
-    return pack;
-  }
-
-  private get seed() {
-    return seed;
-  }
-
   /**
    * calculate distance to coast for every cell
    */
@@ -100,9 +79,9 @@ class FeatureModule {
    */
   markupGrid() {
     TIME && console.time("markupGrid");
-    Math.random = Alea(this.seed); // get the same result on heightmap edit in Erase mode
+    Math.random = Alea(seed); // get the same result on heightmap edit in Erase mode
 
-    const { h: heights, c: neighbors, b: borderCells, i } = this.grid.cells;
+    const { h: heights, c: neighbors, b: borderCells, i } = grid.cells;
     const cellsNumber = i.length;
     const distanceField = new Int8Array(cellsNumber); // gird.cells.t
     const featureIds = new Uint16Array(cellsNumber); // gird.cells.f
@@ -141,9 +120,9 @@ class FeatureModule {
 
     // markup deep ocean cells
     this.markup({ distanceField, neighbors, start: this.DEEP_WATER, increment: -1, limit: -10 });
-    this.grid.cells.t = distanceField;
-    this.grid.cells.f = featureIds;
-    this.grid.features = [0, ...features];
+    grid.cells.t = distanceField;
+    grid.cells.f = featureIds;
+    grid.features = [0, ...features];
 
     TIME && console.timeEnd("markupGrid");
   }
@@ -153,7 +132,7 @@ class FeatureModule {
    */
   markupPack() {
     const defineHaven = (cellId: number) => {
-      const waterCells = neighbors[cellId].filter((index: number) => isWater(index, this.packedGraph));
+      const waterCells = neighbors[cellId].filter((index: number) => isWater(index, pack));
       const distances = waterCells.map((neibCellId: number) => distanceSquared(cells.p[cellId], cells.p[neibCellId]));
       const closest = distances.indexOf(Math.min.apply(Math, distances));
 
@@ -215,7 +194,7 @@ class FeatureModule {
 
       if (type === "lake") {
         if (area > 0) feature.vertices = (feature.vertices as number[]).reverse();
-        feature.shoreline = unique((feature.vertices as number[]).map(vertex => vertices.c[vertex].filter((index: number) => isLand(index, this.packedGraph))).flat() || []);
+        feature.shoreline = unique((feature.vertices as number[]).map(vertex => vertices.c[vertex].filter((index: number) => isLand(index, pack))).flat() || []);
         feature.height = Lakes.getHeight(feature as PackedGraphFeature);
       }
 
@@ -226,7 +205,7 @@ class FeatureModule {
 
     TIME && console.time("markupPack");
 
-    const { cells, vertices } = this.packedGraph;
+    const { cells, vertices } = pack;
     const { c: neighbors, b: borderCells, i } = cells;
     const packCellsNumber = i.length;
     if (!packCellsNumber) return; // no cells -> there is nothing to do
@@ -242,7 +221,7 @@ class FeatureModule {
       const firstCell = queue[0];
       featureIds[firstCell] = featureId;
 
-      const land = isLand(firstCell, this.packedGraph);
+      const land = isLand(firstCell, pack);
       let border = Boolean(borderCells[firstCell]); // true if feature touches map border
       let totalCells = 1; // count cells in a feature
 
@@ -252,7 +231,7 @@ class FeatureModule {
         if (!border && borderCells[cellId]) border = true;
 
         for (const neighborId of neighbors[cellId]) {
-          const isNeibLand = isLand(neighborId, this.packedGraph);
+          const isNeibLand = isLand(neighborId, pack);
 
           if (land && !isNeibLand) {
             distanceField[cellId] = this.LAND_COAST;
@@ -280,12 +259,11 @@ class FeatureModule {
     this.markup({ distanceField, neighbors, start: this.DEEPER_LAND, increment: 1 }); // markup pack land
     this.markup({ distanceField, neighbors, start: this.DEEP_WATER, increment: -1, limit: -10 }); // markup pack water
 
-    this.packedGraph.cells.t = distanceField;
-    this.packedGraph.cells.f = featureIds;
-    this.packedGraph.cells.haven = haven;
-    this.packedGraph.cells.harbor = harbor;
-    this.packedGraph.features = [0 as unknown as PackedGraphFeature, ...features];
-
+    pack.cells.t = distanceField;
+    pack.cells.f = featureIds;
+    pack.cells.haven = haven;
+    pack.cells.harbor = harbor;
+    pack.features = [0 as unknown as PackedGraphFeature, ...features];
     TIME && console.timeEnd("markupPack");
   }
 
@@ -293,14 +271,14 @@ class FeatureModule {
    * define feature groups (ocean, sea, gulf, continent, island, isle, freshwater lake, salt lake, etc.)
    */
   defineGroups() {
-    const gridCellsNumber = this.grid.cells.i.length;
+    const gridCellsNumber = grid.cells.i.length;
     const OCEAN_MIN_SIZE = gridCellsNumber / 25;
     const SEA_MIN_SIZE = gridCellsNumber / 1000;
     const CONTINENT_MIN_SIZE = gridCellsNumber / 10;
     const ISLAND_MIN_SIZE = gridCellsNumber / 1000;
 
     const defineIslandGroup = (feature: PackedGraphFeature) => {
-      const prevFeature = this.packedGraph.features[this.packedGraph.cells.f[feature.firstCell - 1]];
+      const prevFeature = pack.features[pack.cells.f[feature.firstCell - 1]];
       if (prevFeature && prevFeature.type === "lake") return "lake_island";
       if (feature.cells > CONTINENT_MIN_SIZE) return "continent";
       if (feature.cells > ISLAND_MIN_SIZE) return "island";
@@ -334,7 +312,7 @@ class FeatureModule {
       throw new Error(`Markup: unknown feature type ${feature.type}`);
     }
 
-    for (const feature of this.packedGraph.features) {
+    for (const feature of pack.features) {
       if (!feature || feature.type === "ocean") continue;
 
       if (feature.type === "lake") feature.height = Lakes.getHeight(feature);
diff --git a/src/modules/heightmap-generator.ts b/src/modules/heightmap-generator.ts
index 27fb063b..a060ecdc 100644
--- a/src/modules/heightmap-generator.ts
+++ b/src/modules/heightmap-generator.ts
@@ -3,12 +3,7 @@ import { range as d3Range, leastIndex, mean } from "d3";
 import { createTypedArray, byId, findGridCell, getNumberInRange, lim, minmax, P, rand } from "../utils";
 
 declare global {
-  interface Window {
-    HeightmapGenerator: HeightmapGenerator;
-  }
-  var heightmapTemplates: any;
-  var TIME: boolean;
-  var ERROR: boolean;
+  var HeightmapGenerator: HeightmapGenerator;
 }
 
 type Tool = "Hill" | "Pit" | "Range" | "Trough" | "Strait" | "Mask" | "Invert" | "Add" | "Multiply" | "Smooth";
@@ -19,21 +14,6 @@ class HeightmapGenerator {
   blobPower: number = 0;
   linePower: number = 0;
 
-   // TODO: remove after migration to TS and use param in constructor
-  get seed() {
-    return (window as any).seed;
-  }
-  get graphWidth() {
-    return (window as any).graphWidth;
-  }
-  get graphHeight() {
-    return (window as any).graphHeight;
-  }
-
-  constructor() {
-
-  }
-
   private clearData() {
     this.heights = null;
     this.grid = null;
@@ -107,8 +87,8 @@ class HeightmapGenerator {
       let h = lim(getNumberInRange(height));
 
       do {
-        const x = this.getPointInRange(rangeX, this.graphWidth);
-        const y = this.getPointInRange(rangeY, this.graphHeight);
+        const x = this.getPointInRange(rangeX, graphWidth);
+        const y = this.getPointInRange(rangeY, graphHeight);
         if (x === undefined || y === undefined) return;
         start = findGridCell(x, y, this.grid);
         limit++;
@@ -143,8 +123,8 @@ class HeightmapGenerator {
       let h = lim(getNumberInRange(height));
 
       do {
-        const x = this.getPointInRange(rangeX, this.graphWidth);
-        const y = this.getPointInRange(rangeY, this.graphHeight);
+        const x = this.getPointInRange(rangeX, graphWidth);
+        const y = this.getPointInRange(rangeY, graphHeight);
         if (x === undefined || y === undefined) return;
         start = findGridCell(x, y, this.grid);
         limit++;
@@ -207,8 +187,8 @@ class HeightmapGenerator {
 
       if (rangeX && rangeY) {
         // find start and end points
-        const startX = this.getPointInRange(rangeX, this.graphWidth) as number;
-        const startY = this.getPointInRange(rangeY, this.graphHeight) as number;
+        const startX = this.getPointInRange(rangeX, graphWidth) as number;
+        const startY = this.getPointInRange(rangeY, graphHeight) as number;
 
         let dist = 0;
         let limit = 0;
@@ -216,11 +196,11 @@ class HeightmapGenerator {
         let endX;
 
         do {
-          endX = Math.random() * this.graphWidth * 0.8 + this.graphWidth * 0.1;
-          endY = Math.random() * this.graphHeight * 0.7 + this.graphHeight * 0.15;
+          endX = Math.random() * graphWidth * 0.8 + graphWidth * 0.1;
+          endY = Math.random() * graphHeight * 0.7 + graphHeight * 0.15;
           dist = Math.abs(endY - startY) + Math.abs(endX - startX);
           limit++;
-        } while ((dist < this.graphWidth / 8 || dist > this.graphWidth / 3) && limit < 50);
+        } while ((dist < graphWidth / 8 || dist > graphWidth / 3) && limit < 50);
 
         startCellId = findGridCell(startX, startY, this.grid);
         endCellId = findGridCell(endX, endY, this.grid);
@@ -311,19 +291,19 @@ class HeightmapGenerator {
         let endX: number;
         let endY: number;
         do {
-          startX = this.getPointInRange(rangeX, this.graphWidth) as number;
-          startY = this.getPointInRange(rangeY, this.graphHeight) as number;
+          startX = this.getPointInRange(rangeX, graphWidth) as number;
+          startY = this.getPointInRange(rangeY, graphHeight) as number;
           startCellId = findGridCell(startX, startY, this.grid);
           limit++;
         } while (this.heights[startCellId] < 20 && limit < 50);
         
         limit = 0;
         do {
-          endX = Math.random() * this.graphWidth * 0.8 + this.graphWidth * 0.1;
-          endY = Math.random() * this.graphHeight * 0.7 + this.graphHeight * 0.15;
+          endX = Math.random() * graphWidth * 0.8 + graphWidth * 0.1;
+          endY = Math.random() * graphHeight * 0.7 + graphHeight * 0.15;
           dist = Math.abs(endY - startY) + Math.abs(endX - startX);
           limit++;
-        } while ((dist < this.graphWidth / 8 || dist > this.graphWidth / 2) && limit < 50);
+        } while ((dist < graphWidth / 8 || dist > graphWidth / 2) && limit < 50);
         
         endCellId = findGridCell(endX, endY, this.grid);
       }
@@ -378,14 +358,14 @@ class HeightmapGenerator {
     if (desiredWidth < 1 && P(desiredWidth)) return;
     const used = new Uint8Array(this.heights.length);
     const vert = direction === "vertical";
-    const startX = vert ? Math.floor(Math.random() * this.graphWidth * 0.4 + this.graphWidth * 0.3) : 5;
-    const startY = vert ? 5 : Math.floor(Math.random() * this.graphHeight * 0.4 + this.graphHeight * 0.3);
+    const startX = vert ? Math.floor(Math.random() * graphWidth * 0.4 + graphWidth * 0.3) : 5;
+    const startY = vert ? 5 : Math.floor(Math.random() * graphHeight * 0.4 + graphHeight * 0.3);
     const endX = vert
-      ? Math.floor(this.graphWidth - startX - this.graphWidth * 0.1 + Math.random() * this.graphWidth * 0.2)
-      : this.graphWidth - 5;
+      ? Math.floor(graphWidth - startX - graphWidth * 0.1 + Math.random() * graphWidth * 0.2)
+      : graphWidth - 5;
     const endY = vert
-      ? this.graphHeight - 5
-      : Math.floor(this.graphHeight - startY - this.graphHeight * 0.1 + Math.random() * this.graphHeight * 0.2);
+      ? graphHeight - 5
+      : Math.floor(graphHeight - startY - graphHeight * 0.1 + Math.random() * graphHeight * 0.2);
 
     const start = findGridCell(startX, startY, this.grid);
     const end = findGridCell(endX, endY, this.grid);
@@ -462,8 +442,8 @@ class HeightmapGenerator {
 
     this.heights = this.heights.map((h, i) => {
       const [x, y] = this.grid.points[i];
-      const nx = (2 * x) / this.graphWidth - 1; // [-1, 1], 0 is center
-      const ny = (2 * y) / this.graphHeight - 1; // [-1, 1], 0 is center
+      const nx = (2 * x) / graphWidth - 1; // [-1, 1], 0 is center
+      const ny = (2 * y) / graphHeight - 1; // [-1, 1], 0 is center
       let distance = (1 - nx ** 2) * (1 - ny ** 2); // 1 is center, 0 is edge
       if (power < 0) distance = 1 - distance; // inverted, 0 is center, 1 is edge
       const masked = h * distance;
@@ -509,7 +489,7 @@ class HeightmapGenerator {
     TIME && console.time("defineHeightmap");
     const id = (byId("templateInput")! as HTMLInputElement).value;
     
-    Math.random = Alea(this.seed);
+    Math.random = Alea(seed);
     const isTemplate = id in heightmapTemplates;
     
     const heights = isTemplate ? this.fromTemplate(graph, id) : await this.fromPrecreated(graph, id);
diff --git a/src/modules/lakes.ts b/src/modules/lakes.ts
index 1665a3ab..2a20b7a2 100644
--- a/src/modules/lakes.ts
+++ b/src/modules/lakes.ts
@@ -2,14 +2,9 @@ import { PackedGraphFeature } from "./features";
 import { min, mean } from "d3";
 import { byId,
 rn } from "../utils";
-import { PackedGraph } from "./PackedGraph";
 
 declare global {
   var Lakes: LakesModule;
-  var pack: PackedGraph;
-  var Names: any;
-
-  var heightExponentInput: HTMLInputElement;
 }
 
 export class LakesModule {
diff --git a/src/modules/ocean-layers.ts b/src/modules/ocean-layers.ts
index 16dfc59b..cfff2c0c 100644
--- a/src/modules/ocean-layers.ts
+++ b/src/modules/ocean-layers.ts
@@ -3,14 +3,7 @@ import type { Selection } from 'd3';
 import { clipPoly,P,rn,round } from '../utils';
 
 declare global {
-  interface Window {
-    OceanLayers: any;
-  }
-
-  var TIME: boolean;
-  var ERROR: boolean;
-  var grid: any;
-  var oceanLayers: Selection<SVGGElement, unknown, null, undefined>;
+  var OceanLayers: typeof OceanModule.prototype.draw;
 }
 class OceanModule {
   private cells: any;
@@ -25,10 +18,6 @@ class OceanModule {
     this.oceanLayers = oceanLayers;
   }
 
-  get grid(): any {
-    return grid;
-  }
-
   randomizeOutline() {
     const limits = [];
     let odd = 0.2;
diff --git a/src/modules/river-generator.ts b/src/modules/river-generator.ts
index 7a6ed447..ddf0bb16 100644
--- a/src/modules/river-generator.ts
+++ b/src/modules/river-generator.ts
@@ -1,32 +1,13 @@
 import Alea from "alea";
 import { curveBasis,
 line,
-mean, min, sum, curveCatmullRom, Selection } from "d3";
+mean, min, sum, curveCatmullRom } from "d3";
 import { each,
 rn,round, 
 rw} from "../utils";
-import { PackedGraphFeature } from "./features";
-import { PackedGraph } from "./PackedGraph";
-import { LakesModule } from "./lakes";
 
 declare global {
-  interface Window {
-    Rivers: any;
-  }
-
-  var WARN: boolean;
-  var graphHeight: number;
-  var graphWidth: number;
-  var pack: PackedGraph;
-
-  var rivers: Selection<SVGElement, unknown, null, undefined>;
-  var pointsInput: HTMLInputElement;
-  var grid: any;
-  var seed: string;
-  var TIME: boolean;
-
-  var Names: any;
-  var Lakes: LakesModule;
+  var Rivers: RiverModule;
 }
 
 export interface River {
@@ -66,22 +47,10 @@ class RiverModule {
 
   smallLength: number | null = null;
 
-  get graphHeight() {
-    return graphHeight;
-  }
-
-  get graphWidth() {
-    return graphWidth;
-  }
-
-  get pack(): PackedGraph {
-    return pack;
-  }
-
   generate(allowErosion = true) {
     TIME && console.time("generateRivers");
     Math.random = Alea(seed);
-    const {cells, features} = this.pack;
+    const {cells, features} = pack;
 
     const riversData: {[riverId: number]: number[]} = {};
     const riverParents: {[key: number]: number} = {};
@@ -220,7 +189,7 @@ class RiverModule {
       // re-initialize rivers and confluence arrays
       cells.r = new Uint16Array(cells.i.length);
       cells.conf = new Uint16Array(cells.i.length);
-      this.pack.rivers = [];
+      pack.rivers = [];
 
       const defaultWidthFactor = rn(1 / (parseInt(pointsInput.dataset.cells || "10000") / 10000) ** 0.25, 2);
       const mainStemWidthFactor = defaultWidthFactor * 1.2;
@@ -256,7 +225,7 @@ class RiverModule {
           })
         );
 
-        this.pack.rivers.push({
+        pack.rivers.push({
           i: riverId,
           source,
           mouth,
@@ -274,7 +243,7 @@ class RiverModule {
     const downcutRivers = () => {
       const MAX_DOWNCUT = 5;
 
-      for (const i of this.pack.cells.i) {
+      for (const i of pack.cells.i) {
         if (cells.h[i] < 35) continue; // don't donwcut lowlands
         if (!cells.fl[i]) continue;
 
@@ -322,7 +291,7 @@ class RiverModule {
   };
 
   alterHeights(): Uint8Array {
-    const {h, c, t} = this.pack.cells as {h: Uint8Array, c: number[][], t: Uint8Array};
+    const {h, c, t} = pack.cells as {h: Uint8Array, c: number[][], t: Uint8Array};
     return Uint8Array.from(Array.from(h).map((h, i) => {
       if (h < 20 || t[i] < 1) return h;
       return h + t[i] / 100 + (mean(c[i].map(c => t[c])) || 0) / 10000;
@@ -331,14 +300,14 @@ class RiverModule {
 
   // depression filling algorithm (for a correct water flux modeling)
   resolveDepressions(h: Uint8Array) {
-    const {cells, features} = this.pack;
+    const {cells, features} = pack;
     const maxIterations = +(document.getElementById("resolveDepressionsStepsOutput") as HTMLInputElement)?.value;
     const checkLakeMaxIteration = maxIterations * 0.85;
     const elevateLakeMaxIteration = maxIterations * 0.75;
 
     const height = (i: number) => features[cells.f[i]].height || h[i]; // height of lake or specific cell
 
-    const lakes = features.filter((feature: PackedGraphFeature) => feature.type === "lake");
+    const lakes = features.filter((feature) => feature.type === "lake");
     const land = cells.i.filter((i: number) => h[i] >= 20 && !cells.b[i]); // exclude near-border cells
     land.sort((a: number, b: number) => h[a] - h[b]); // lowest cells go first
 
@@ -389,7 +358,7 @@ class RiverModule {
   };
 
   addMeandering(riverCells: number[], riverPoints = null, meandering = 0.5): [number, number, number][] {
-    const {fl, h} = this.pack.cells;
+    const {fl, h} = pack.cells;
     const meandered = [];
     const lastStep = riverCells.length - 1;
     const points = this.getRiverPoints(riverCells, riverPoints);
@@ -441,7 +410,7 @@ class RiverModule {
   getRiverPoints(riverCells: number[], riverPoints: [number, number][] | null) {
     if (riverPoints) return riverPoints;
 
-    const {p} = this.pack.cells;
+    const {p} = pack.cells;
     return riverCells.map((cell, i) => {
       if (cell === -1) return this.getBorderPoint(riverCells[i - 1]);
       return p[cell];
@@ -449,12 +418,12 @@ class RiverModule {
   };
 
   getBorderPoint(i: number) {
-    const [x, y] = this.pack.cells.p[i];
-    const min = Math.min(y, this.graphHeight - y, x, this.graphWidth - x);
+    const [x, y] = pack.cells.p[i];
+    const min = Math.min(y, graphHeight - y, x, graphWidth - x);
     if (min === y) return [x, 0];
-    else if (min === this.graphHeight - y) return [x, this.graphHeight];
+    else if (min === graphHeight - y) return [x, graphHeight];
     else if (min === x) return [0, y];
-    return [this.graphWidth, y];
+    return [graphWidth, y];
   };
 
   getOffset({flux, pointIndex, widthFactor, startingWidth}: {flux: number, pointIndex: number, widthFactor: number, startingWidth: number}) {
@@ -499,7 +468,7 @@ class RiverModule {
   };
 
   specify() {
-    const rivers = this.pack.rivers;
+    const rivers = pack.rivers;
     if (!rivers.length) return;
 
     for (const river of rivers) {
@@ -510,13 +479,13 @@ class RiverModule {
   };
 
   getName(cell: number) {
-    return Names.getCulture(this.pack.cells.culture[cell]);
+    return Names.getCulture(pack.cells.culture[cell]);
   };
 
   getType({i, length, parent}: River) {
     if (this.smallLength === null) {
-      const threshold = Math.ceil(this.pack.rivers.length * 0.15);
-      this.smallLength = this.pack.rivers.map(r => r.length || 0).sort((a: number, b: number) => a - b)[threshold];
+      const threshold = Math.ceil(pack.rivers.length * 0.15);
+      this.smallLength = pack.rivers.map(r => r.length || 0).sort((a: number, b: number) => a - b)[threshold];
     }
 
     const isSmall: boolean = length < (this.smallLength as number);
@@ -537,8 +506,8 @@ class RiverModule {
 
   // remove river and all its tributaries
   remove(id: number) {
-    const cells = this.pack.cells;
-    const riversToRemove = this.pack.rivers.filter(r => r.i === id || r.parent === id || r.basin === id).map(r => r.i);
+    const cells = pack.cells;
+    const riversToRemove = pack.rivers.filter(r => r.i === id || r.parent === id || r.basin === id).map(r => r.i);
     riversToRemove.forEach(r => rivers.select("#river" + r).remove());
     cells.r.forEach((r, i) => {
       if (!r || !riversToRemove.includes(r)) return;
@@ -546,11 +515,11 @@ class RiverModule {
       cells.fl[i] = grid.cells.prec[cells.g[i]];
       cells.conf[i] = 0;
     });
-    this.pack.rivers = this.pack.rivers.filter(r => !riversToRemove.includes(r.i));
+    pack.rivers = pack.rivers.filter(r => !riversToRemove.includes(r.i));
   };
 
   getBasin(r: number): number {
-    const parent = this.pack.rivers.find(river => river.i === r)?.parent;
+    const parent = pack.rivers.find(river => river.i === r)?.parent;
     if (!parent || r === parent) return r;
     return this.getBasin(parent);
   };
diff --git a/src/modules/PackedGraph.ts b/src/types/PackedGraph.ts
similarity index 91%
rename from src/modules/PackedGraph.ts
rename to src/types/PackedGraph.ts
index d6295430..c058520e 100644
--- a/src/modules/PackedGraph.ts
+++ b/src/types/PackedGraph.ts
@@ -1,5 +1,5 @@
-import { PackedGraphFeature } from "./features";
-import { River } from "./river-generator";
+import { PackedGraphFeature } from "../modules/features";
+import { River } from "../modules/river-generator";
 
 
 type TypedArray = Uint8Array | Uint16Array | Uint32Array | Int8Array | Int16Array | Float32Array | Float64Array;
diff --git a/src/types/global.ts b/src/types/global.ts
new file mode 100644
index 00000000..1f37d64e
--- /dev/null
+++ b/src/types/global.ts
@@ -0,0 +1,33 @@
+import type { Selection } from 'd3';
+import { PackedGraph } from "./PackedGraph";
+
+declare global {
+  var seed: string;
+  var pack: PackedGraph;
+  var grid: any;
+  var graphHeight: number;
+  var graphWidth: number;
+  
+  var TIME: boolean;
+  var WARN: boolean;
+  var ERROR: boolean;
+
+  var heightmapTemplates: any;
+  var Names: any;
+  
+  var pointsInput: HTMLInputElement;
+  var heightExponentInput: HTMLInputElement;
+
+  var rivers: Selection<SVGElement, unknown, null, undefined>;
+  var oceanLayers: Selection<SVGGElement, unknown, null, undefined>;
+  var biomesData: {
+    i: number[];
+    name: string[];
+    color: string[];
+    biomesMatrix: Uint8Array[];
+    habitability: number[];
+    iconsDensity: number[];
+    icons: string[][];
+    cost: number[];
+  };
+}
\ No newline at end of file