diff --git a/src/anims/PathAnimator.ts b/src/anims/PathAnimator.ts
index 57ba8f6..08e12c5 100644
--- a/src/anims/PathAnimator.ts
+++ b/src/anims/PathAnimator.ts
@@ -1,5 +1,5 @@
 import { cloneDeep } from 'lodash';
-import { GameObjects } from 'phaser';
+import { GameObjects, Scene } from 'phaser';
 import { CoveredWagon } from '../components/CoveredWagon';
 import { DEV } from '../dev-config';
 import { ILevel } from '../levels/ILevel';
@@ -8,7 +8,7 @@ export class PathAnimator {
     private wagon?: GameObjects.PathFollower;
     private enabled = false; // TODO #208 enable
 
-    constructor(private scene, private currentLevel: ILevel) {
+    constructor(private scene: Scene, private currentLevel: ILevel) {
         if (DEV.showPaths) {
             this.showTravelPaths();
         }
@@ -39,8 +39,10 @@ export class PathAnimator {
         );
         const isReverse = !!reverseDirection;
         const path = cloneDeep(rightDirection || reverseDirection);
-        const directedPoints = isReverse ? path.points : path.points.reverse();
-        if (directedPoints.length === 0) {
+        const directedPoints = isReverse
+            ? path?.points
+            : path?.points?.reverse();
+        if (!directedPoints || directedPoints.length === 0) {
             return;
         }
         const points = directedPoints.map(
@@ -74,7 +76,7 @@ export class PathAnimator {
             if (path.points?.length === 0) {
                 return;
             }
-            const points = path.points.map(
+            const points = path.points?.map(
                 ({ x, y }) => new Phaser.Math.Vector2(x, y)
             );
             const curve = new Phaser.Curves.Spline(points);
@@ -83,7 +85,7 @@ export class PathAnimator {
             graphics.lineStyle(1, 0xffffff, 1);
             curve.draw(graphics, 64);
             graphics.fillStyle(0x00ff00, 1);
-            for (const point of points) {
+            for (const point of points || []) {
                 graphics.fillCircle(point.x, point.y, 4);
             }
         });
diff --git a/src/components/Balloon.ts b/src/components/Balloon.ts
index a84187f..554ce4b 100644
--- a/src/components/Balloon.ts
+++ b/src/components/Balloon.ts
@@ -75,7 +75,7 @@ function getBalloonTweenConfig(
         return {
             targets: image,
             x: x2,
-            ease: (t) => t,
+            ease: (t: number) => t,
             duration: 5000,
             yoyo: true,
             repeat: -1,
@@ -90,24 +90,28 @@ function getBalloonTweenConfig(
                                 image.x,
                                 x1,
                                 x2,
-                                (this as CustomTween).movementPattern
+                                (this as unknown as CustomTween).movementPattern
                             )
                     );
             },
             onYoyo() {
+                // @ts-ignore TODO fix this
                 this.setTimeScale(Math.max(Math.random(), MIN_BALLOON_SPEED));
-                (this as CustomTween).movementPattern = random(numberOfCases);
+                (this as unknown as CustomTween).movementPattern =
+                    random(numberOfCases);
             },
             onRepeat() {
+                // @ts-ignore TODO fix this
                 this.setTimeScale(Math.max(Math.random(), MIN_BALLOON_SPEED));
-                (this as CustomTween).movementPattern = random(numberOfCases);
+                (this as unknown as CustomTween).movementPattern =
+                    random(numberOfCases);
             },
         };
     } else {
         return {
             targets: image,
             y: y2,
-            ease: (t) => t,
+            ease: (t: number) => t,
             duration: 2000,
             yoyo: true,
             repeat: -1,
@@ -122,17 +126,21 @@ function getBalloonTweenConfig(
                                 image.y,
                                 y1,
                                 y2,
-                                (this as CustomTween).movementPattern
+                                (this as unknown as CustomTween).movementPattern
                             )
                     );
             },
             onYoyo() {
+                // @ts-ignore TODO fix this
                 this.setTimeScale(Math.max(Math.random(), MIN_BALLOON_SPEED));
-                (this as CustomTween).movementPattern = random(numberOfCases);
+                (this as unknown as CustomTween).movementPattern =
+                    random(numberOfCases);
             },
             onRepeat() {
+                // @ts-ignore TODO fix this
                 this.setTimeScale(Math.max(Math.random(), MIN_BALLOON_SPEED));
-                (this as CustomTween).movementPattern = random(numberOfCases);
+                (this as unknown as CustomTween).movementPattern =
+                    random(numberOfCases);
             },
         };
     }
diff --git a/src/components/BannerButton.ts b/src/components/BannerButton.ts
index 0b25630..0693ed0 100644
--- a/src/components/BannerButton.ts
+++ b/src/components/BannerButton.ts
@@ -6,7 +6,7 @@ import { TextConfig } from '../styles/Text';
 const CLICK_COOLDOWN = 1000;
 
 export class BannerButton extends GameObjects.Sprite {
-    private buttonText: GameObjects.Text;
+    private buttonText!: GameObjects.Text;
 
     constructor(
         scene: Scene,
diff --git a/src/components/CityContainer.ts b/src/components/CityContainer.ts
index e61b45d..d404144 100644
--- a/src/components/CityContainer.ts
+++ b/src/components/CityContainer.ts
@@ -100,7 +100,7 @@ export class CityContainer extends Phaser.GameObjects.Container {
     }
 
     private defineDrag() {
-        this.on('drag', (pointer, dragX, dragY) => {
+        this.on('drag', (_: unknown, dragX: number, dragY: number) => {
             this.x = dragX;
             this.y = dragY;
             this.onTranslation(dragX, dragY);
diff --git a/src/components/ImportLevelButton.ts b/src/components/ImportLevelButton.ts
index 0fdb37a..966fc5a 100644
--- a/src/components/ImportLevelButton.ts
+++ b/src/components/ImportLevelButton.ts
@@ -29,7 +29,7 @@ export class ImportLevelButton extends GameObjects.Text {
         input.remove();
     };
 
-    private async handleFileSelect(event) {
+    private async handleFileSelect(event: Event) {
         const importedLevel = await parseLevelFromJsonUpload(event);
         this.afterLevelParsedCb(importedLevel);
     }
@@ -41,9 +41,9 @@ function parseLevelFromJsonUpload(event: any): Promise<ILevel> {
         const reader = new FileReader();
         reader.onload = (file) => {
             try {
-                const json = JSON.parse(file.target.result as string);
+                const json = JSON.parse(file.target?.result as string);
                 resolve(json);
-            } catch (err) {
+            } catch (err: any) {
                 alert(
                     `Error when trying to parse file as JSON. Original error: ${err.message}`
                 );
diff --git a/src/components/ShopContainer.ts b/src/components/ShopContainer.ts
index 608d3bd..2bb2bc5 100644
--- a/src/components/ShopContainer.ts
+++ b/src/components/ShopContainer.ts
@@ -91,7 +91,7 @@ export class ShopContainer extends Phaser.GameObjects.Container {
     }
 
     private defineDrag() {
-        this.on('drag', (pointer, dragX, dragY) => {
+        this.on('drag', (_: unknown, dragX: number, dragY: number) => {
             this.x = dragX;
             this.y = dragY;
             this.onTranslation(dragX, dragY);
diff --git a/src/levels/ILevel.ts b/src/levels/ILevel.ts
index dcfe894..8fabd41 100644
--- a/src/levels/ILevel.ts
+++ b/src/levels/ILevel.ts
@@ -1,5 +1,5 @@
 export interface ILevel {
-    name?: string;
+    name: string;
     cities: ICity[];
     shops?: IShop[];
     travelPaths: Array<{
diff --git a/src/scenes/TitleScene.ts b/src/scenes/TitleScene.ts
index b5737e4..e6d0fea 100644
--- a/src/scenes/TitleScene.ts
+++ b/src/scenes/TitleScene.ts
@@ -11,7 +11,7 @@ export interface ITitleSceneInitData {
 }
 
 export class TitleScene extends Scene {
-    private backgroundSound: Sound.BaseSound;
+    private backgroundSound!: Sound.BaseSound;
     private fadeInEnabled = true;
 
     constructor() {
diff --git a/src/scenes/editorScene.ts b/src/scenes/editorScene.ts
index 5ece016..f7b9762 100644
--- a/src/scenes/editorScene.ts
+++ b/src/scenes/editorScene.ts
@@ -173,10 +173,13 @@ export class EditorScene extends Scene {
     }
 
     private defineStartIconEvents() {
-        this.startIcon.on('drag', (pointer, dragX, dragY) => {
-            this.startIcon.x = dragX;
-            this.startIcon.y = dragY;
-        });
+        this.startIcon.on(
+            'drag',
+            (_: unknown, dragX: number, dragY: number) => {
+                this.startIcon.x = dragX;
+                this.startIcon.y = dragY;
+            }
+        );
         this.startIcon.on('pointerdown', () => {
             this.noStartIconDrag = false;
             this.startIcon.once('pointerup', () => {
@@ -249,6 +252,10 @@ export class EditorScene extends Scene {
             const nodeW = this.buildings().display.find(
                 (container) => path.second === container.name
             );
+            if (!nodeV || !nodeW)
+                throw new Error(
+                    `Node not found for path ${path.first} to ${path.second}`
+                );
             const line = new Phaser.Geom.Line(
                 nodeV.x,
                 nodeV.y,
@@ -265,14 +272,14 @@ export class EditorScene extends Scene {
         const numberOfTargets = buildings.length;
         const possibleNames = new Array(numberOfTargets + 1)
             .fill(1)
-            .map((undefined, index) => this.concateName(isFor, index));
+            .map((_, index) => this.concateName(isFor, index));
 
         const nameIsUnused = (name: string) =>
             (buildings as NameHolder[]).every(
                 (building) => building.name !== name
             );
 
-        return possibleNames.find((name) => nameIsUnused(name));
+        return possibleNames.find((name) => nameIsUnused(name))!;
     }
 
     private concateName(isFor: 'City' | 'Shop', index: number) {
@@ -294,7 +301,7 @@ export class EditorScene extends Scene {
         }
         const cityInList = this.level.cities.find(
             (container) => city.name === container.name
-        );
+        )!;
         const newEconomy = { stock: city.stock, production: city.production };
         const stockAdd = (summand: number) => {
             cityInList.stock += summand;
@@ -340,7 +347,7 @@ export class EditorScene extends Scene {
         }
         const shopInList = this.level.shops.find(
             (container) => shop.name === container.name
-        );
+        )!;
         const onTranslation = (x: number, y: number) => {
             shopInList.x = x;
             shopInList.y = y;
@@ -479,7 +486,7 @@ export class EditorScene extends Scene {
         localStorage.removeItem(STORED_LEVEL_KEY);
         localStorage.setItem(STORED_LEVEL_KEY, jsonTryOutLevel);
         const textField = document.getElementById('text');
-        textField.remove();
+        textField?.remove();
         this.scene.remove(this);
     }
 }
diff --git a/src/scenes/mainScene.ts b/src/scenes/mainScene.ts
index dd919c7..e989e44 100644
--- a/src/scenes/mainScene.ts
+++ b/src/scenes/mainScene.ts
@@ -96,10 +96,11 @@ export class MainScene extends Scene {
 
     private addBalloonForEdge(startCityName: string, targetCityName: string) {
         const allNodes = getNodes(this.graph);
-        const startCity = allNodes.find((city) => city.name === startCityName);
+        // always defined by construction
+        const startCity = allNodes.find((city) => city.name === startCityName)!;
         const targetCity = allNodes.find(
             (city) => city.name === targetCityName
-        );
+        )!;
         new Balloon(this, startCity, targetCity);
         new DottedLine(this, startCity, targetCity);
     }
diff --git a/tsconfig.json b/tsconfig.json
index b7d3c6f..65b7d5e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,7 +2,7 @@
     "compilerOptions": {
         "target": "ES2017",
         "module": "CommonJs",
-        "strict": false,
+        "strict": true,
         "noImplicitReturns": true,
         "noUnusedLocals": false,
         "noUnusedParameters": false,