diff --git a/back/volume/src/pong/entity/result.entity.ts b/back/volume/src/pong/entity/result.entity.ts
index 2a9eade..87ab54d 100644
--- a/back/volume/src/pong/entity/result.entity.ts
+++ b/back/volume/src/pong/entity/result.entity.ts
@@ -14,7 +14,7 @@ export default class Result {
   @PrimaryGeneratedColumn()
     id: number
 
-  @ManyToMany(() => User, (player: User) => player.results, { cascade: true})
+  @ManyToMany(() => User, (player: User) => player.results, { cascade: true })
     players: Array<User | null> // TODO: change to User[] for final version
 
   @Column('text', { array: true })
diff --git a/back/volume/src/pong/game/Game.ts b/back/volume/src/pong/game/Game.ts
index 219466e..7b54ada 100644
--- a/back/volume/src/pong/game/Game.ts
+++ b/back/volume/src/pong/game/Game.ts
@@ -16,7 +16,6 @@ import { type MapDtoValidated } from '../dtos/MapDtoValidated'
 import { type GameUpdate } from '../dtos/GameUpdate'
 import { type GameInfo } from '../dtos/GameInfo'
 import { type PongService } from '../pong.service'
-import { Injectable, Inject } from '@nestjs/common'
 
 function gameLoop (game: Game): void {
   const canvasRect: Rect = new Rect(
@@ -34,7 +33,7 @@ function gameLoop (game: Game): void {
     game.players[indexPlayerScored].score += 1
     if (game.players[indexPlayerScored].score >= DEFAULT_WIN_SCORE) {
       console.log(`${game.players[indexPlayerScored].name} won!`)
-      game.stop()
+      void game.stop()
     }
   }
 
@@ -116,7 +115,7 @@ export class Game {
     if (playerIndex !== -1) {
       this.players.splice(playerIndex, 1)
       if (this.players.length < 2) {
-        this.stop()
+        void this.stop()
       }
     }
   }
diff --git a/back/volume/src/pong/pong.module.ts b/back/volume/src/pong/pong.module.ts
index 594383b..821acbb 100644
--- a/back/volume/src/pong/pong.module.ts
+++ b/back/volume/src/pong/pong.module.ts
@@ -6,9 +6,7 @@ import { PongService } from './pong.service'
 import { UsersModule } from 'src/users/users.module'
 
 @Module({
-  imports: [
-    forwardRef(() => UsersModule),
-    TypeOrmModule.forFeature([Result])],
+  imports: [forwardRef(() => UsersModule), TypeOrmModule.forFeature([Result])],
   providers: [PongGateway, PongService],
   exports: [PongService]
 })
diff --git a/back/volume/src/pong/pong.service.ts b/back/volume/src/pong/pong.service.ts
index 45f44c8..5b0ba84 100644
--- a/back/volume/src/pong/pong.service.ts
+++ b/back/volume/src/pong/pong.service.ts
@@ -1,4 +1,4 @@
-import { Inject, Injectable, forwardRef } from '@nestjs/common'
+import { Injectable } from '@nestjs/common'
 import { InjectRepository } from '@nestjs/typeorm'
 import { Repository } from 'typeorm'
 import { UsersService } from 'src/users/users.service'
@@ -14,28 +14,28 @@ export class PongService {
     private readonly usersService: UsersService
   ) {}
 
-  async updatePlayer (i: number, result: Result) {
+  async updatePlayer (i: number, result: Result): Promise<void> {
     const player: User | null = result.players[i]
     if (player == null) return
     player.matchs++
     if (result.score[i] > result.score[Math.abs(i - 1)]) player.wins++
     else player.looses++
     player.winrate = (100 * player.wins) / player.matchs
-    player.rank = await this.usersService.getRank(player.ftId) + 1
-    //player.results.push(result)
+    player.rank = (await this.usersService.getRank(player.ftId)) + 1
+    // player.results.push(result)
     this.usersService.save(player)
   }
 
-  async saveResult (players: Player[]) {
-    let result = new Result()
-    let ply = new Array<User | null>
+  async saveResult (players: Player[]): Promise<void> {
+    const result = new Result()
+    const ply = new Array<User | null>()
     ply.push(await this.usersService.findUserByName(players[0].name))
     ply.push(await this.usersService.findUserByName(players[1].name))
-    result.players = ply;
+    result.players = ply
     result.score = [players[0].score, players[1].score]
-    this.resultsRepository.save(result)
-    this.updatePlayer(0, result)
-    this.updatePlayer(1, result)
+    await this.resultsRepository.save(result)
+    await this.updatePlayer(0, result)
+    await this.updatePlayer(1, result)
   }
 
   async getHistory (): Promise<Result[]> {
@@ -48,5 +48,4 @@ export class PongService {
     const results = await this.usersService.getResults(ftId)
     return results.sort((a, b) => (a.date < b.date ? 1 : -1))
   }
-
 }
diff --git a/back/volume/src/types.d.ts b/back/volume/src/types.d.ts
index afe5375..0f5d664 100644
--- a/back/volume/src/types.d.ts
+++ b/back/volume/src/types.d.ts
@@ -1,5 +1,5 @@
 declare module 'passport-42' {
   export type Profile = any
   export type VerifyCallback = any
-  export class Strategy {}
+  export class Strategy {}!
 }
diff --git a/back/volume/src/users/users.controller.ts b/back/volume/src/users/users.controller.ts
index 81c5f14..ad7d1fa 100644
--- a/back/volume/src/users/users.controller.ts
+++ b/back/volume/src/users/users.controller.ts
@@ -11,7 +11,8 @@ import {
   Res,
   StreamableFile,
   BadRequestException,
-  Redirect
+  Redirect,
+  type NotFoundException
 } from '@nestjs/common'
 
 import { FileInterceptor } from '@nestjs/platform-express'
@@ -30,59 +31,59 @@ import { ApiBody, ApiConsumes } from '@nestjs/swagger'
 import { type Request, Response } from 'express'
 import { createReadStream } from 'fs'
 import { join } from 'path'
+import type Result from 'src/pong/entity/result.entity'
 
 @Controller()
 export class UsersController {
-  constructor(
+  constructor (
     private readonly usersService: UsersService,
     private readonly pongService: PongService
-  ) { }
+  ) {}
 
   @Get('all')
-  async getAllUsers(): Promise<User[]> {
+  async getAllUsers (): Promise<User[]> {
     return await this.usersService.findUsers()
   }
 
   @Get('online')
-  async getOnlineUsers(): Promise<User[]> {
+  async getOnlineUsers (): Promise<User[]> {
     return await this.usersService.findOnlineUsers()
   }
 
   @Get('friends')
   @UseGuards(AuthenticatedGuard)
-  async getFriends(@FtUser() profile: Profile) {
+  async getFriends (@FtUser() profile: Profile): Promise<User[]> {
     return await this.usersService.getFriends(profile.id)
   }
 
   @Get('invits')
   @UseGuards(AuthenticatedGuard)
-  async getInvits(@FtUser() profile: Profile) {
+  async getInvits (@FtUser() profile: Profile): Promise<User[]> {
     return await this.usersService.getInvits(profile.id)
   }
 
-
   @Get('leader')
   @UseGuards(AuthenticatedGuard)
-  async getLeader() {
+  async getLeader (): Promise<User[]> {
     return await this.usersService.getLeader()
   }
 
   @Get('leader/:id')
   @UseGuards(AuthenticatedGuard)
-  async getRank(@Param('id', ParseIntPipe) id: number) {
+  async getRank (@Param('id', ParseIntPipe) id: number): Promise<number> {
     return await this.usersService.getRank(id)
   }
 
   @Get('history')
   @UseGuards(AuthenticatedGuard)
-  async getHistory() {
+  async getHistory (): Promise<Result[]> {
     return await this.pongService.getHistory()
   }
 
   @Get('history/:id')
   @UseGuards(AuthenticatedGuard)
-  async getHistoryById(@Param('id', ParseIntPipe) id: number) {
-    return this.pongService.getHistoryById(id)
+  async getHistoryById (@Param('id', ParseIntPipe) id: number): Promise<Result[]> {
+    return await this.pongService.getHistoryById(id)
   }
 
   @Post('avatar')
@@ -107,43 +108,43 @@ export class UsersController {
     description: 'A new avatar for the user',
     type: AvatarUploadDto
   })
-  async addAvatar(
+  async addAvatar (
     @FtUser() profile: Profile,
-    @UploadedFile() file: Express.Multer.File
-  ) {
+      @UploadedFile() file: Express.Multer.File
+  ): Promise<void> {
     await this.usersService.addAvatar(profile.id, file.filename)
   }
 
   @Get('avatar')
   @UseGuards(AuthenticatedGuard)
-  async getAvatar(
+  async getAvatar (
     @FtUser() profile: Profile,
-    @Res({ passthrough: true }) response: Response
-  ) {
+      @Res({ passthrough: true }) response: Response
+  ): Promise<StreamableFile | null> {
     return await this.getAvatarById(profile.id, response)
   }
 
   @Get('user/:name')
-  async getUserByName(@Param('name') username: string): Promise<User | null> {
+  async getUserByName (@Param('name') username: string): Promise<User | null> {
     return await this.usersService.findUserByName(username)
   }
 
   @Get('invit/:id')
   @UseGuards(AuthenticatedGuard)
-  async invitUser(
+  async invitUser (
     @FtUser() profile: Profile,
-    @Param('id', ParseIntPipe) id: number
-  ) {
+      @Param('id', ParseIntPipe) id: number
+  ): Promise<NotFoundException | null | undefined> {
     return await this.usersService.invit(profile.id, id)
   }
 
   @Get('avatar/:id')
-  async getAvatarById(
+  async getAvatarById (
     @Param('id', ParseIntPipe) ftId: number,
-    @Res({ passthrough: true }) response: Response
-  ) {
+      @Res({ passthrough: true }) response: Response
+  ): Promise<StreamableFile | null> {
     const user = await this.usersService.findUser(ftId)
-    if (user == null) return
+    if (user == null) return null
     const filename = user.avatar
     const stream = createReadStream(join(process.cwd(), 'avatars/' + filename))
     response.set({
@@ -154,15 +155,15 @@ export class UsersController {
   }
 
   @Get(':id')
-  async getUserById(
+  async getUserById (
     @Param('id', ParseIntPipe) ftId: number
   ): Promise<User | null> {
     return await this.usersService.findUser(ftId)
   }
 
-  @Post(":id")
+  @Post(':id')
   @UseGuards(AuthenticatedGuard)
-  async createById(@Body() payload: UserDto) {
+  async createById (@Body() payload: UserDto): Promise<User | null> {
     const user = await this.usersService.findUser(payload.ftId)
     if (user != null) {
       return await this.usersService.update(user, payload)
@@ -173,13 +174,13 @@ export class UsersController {
 
   @Get()
   @UseGuards(AuthenticatedGuard)
-  async getUser(@FtUser() profile: Profile): Promise<User | null> {
+  async getUser (@FtUser() profile: Profile): Promise<User | null> {
     return await this.usersService.findUser(profile.id)
   }
 
   @Post()
   @UseGuards(AuthenticatedGuard)
-  async create(@Body() payload: UserDto, @FtUser() profile: Profile) {
+  async create (@Body() payload: UserDto, @FtUser() profile: Profile): Promise<User | null> {
     const user = await this.usersService.findUser(profile.id)
     if (user != null) {
       return await this.usersService.update(user, payload)
@@ -187,5 +188,4 @@ export class UsersController {
       return await this.usersService.create(payload)
     }
   }
-
 }
diff --git a/back/volume/src/users/users.module.ts b/back/volume/src/users/users.module.ts
index 3a1b851..f4f5190 100644
--- a/back/volume/src/users/users.module.ts
+++ b/back/volume/src/users/users.module.ts
@@ -6,11 +6,9 @@ import { UsersService } from './users.service'
 import { PongModule } from 'src/pong/pong.module'
 
 @Module({
-  imports: [
-    forwardRef(() => PongModule),
-    TypeOrmModule.forFeature([User])],
+  imports: [forwardRef(() => PongModule), TypeOrmModule.forFeature([User])],
   controllers: [UsersController],
   providers: [UsersService],
   exports: [UsersService]
 })
-export class UsersModule { }
+export class UsersModule {}
diff --git a/back/volume/src/users/users.service.ts b/back/volume/src/users/users.service.ts
index fdda2eb..cc318b1 100644
--- a/back/volume/src/users/users.service.ts
+++ b/back/volume/src/users/users.service.ts
@@ -4,13 +4,13 @@ import { EntityNotFoundError, QueryFailedError, Repository } from 'typeorm'
 import { User } from './entity/user.entity'
 import { type UserDto } from './dto/user.dto'
 import { type Channel } from 'src/chat/entity/channel.entity'
-import Result from 'src/pong/entity/result.entity'
+import type Result from 'src/pong/entity/result.entity'
 
 @Injectable()
 @Catch(QueryFailedError, EntityNotFoundError)
 export class UsersService {
   constructor (
-    @InjectRepository(User) private readonly usersRepository: Repository<User>,
+    @InjectRepository(User) private readonly usersRepository: Repository<User>
   ) {}
 
   save (user: User) {
diff --git a/front/volume/src/components/Pong/Ball.ts b/front/volume/src/components/Pong/Ball.ts
index d4e621a..00ef960 100644
--- a/front/volume/src/components/Pong/Ball.ts
+++ b/front/volume/src/components/Pong/Ball.ts
@@ -4,10 +4,7 @@ export class Ball {
   rect: Rect;
   speed: Point;
 
-  constructor(
-    spawn: Point,
-    size: Point = new Point(20, 20)
-  ) {
+  constructor(spawn: Point, size: Point = new Point(20, 20)) {
     this.rect = new Rect(spawn, size);
   }
 
diff --git a/front/volume/src/components/Pong/ColorPicker.svelte b/front/volume/src/components/Pong/ColorPicker.svelte
index 94fee35..6bd6d9a 100644
--- a/front/volume/src/components/Pong/ColorPicker.svelte
+++ b/front/volume/src/components/Pong/ColorPicker.svelte
@@ -3,7 +3,7 @@
 </script>
 
 <div>
-  <input type="color" bind:value={color}>
+  <input type="color" bind:value={color} />
 </div>
 
 <style>
diff --git a/front/volume/src/components/Pong/Game.ts b/front/volume/src/components/Pong/Game.ts
index 09a9717..94082fc 100644
--- a/front/volume/src/components/Pong/Game.ts
+++ b/front/volume/src/components/Pong/Game.ts
@@ -20,7 +20,12 @@ export class Game {
   elementsColor: string;
   backgroundColor: string;
 
-  constructor(canvas: HTMLCanvasElement, context: CanvasRenderingContext2D, elementsColor: string, backgroundColor: string) {
+  constructor(
+    canvas: HTMLCanvasElement,
+    context: CanvasRenderingContext2D,
+    elementsColor: string,
+    backgroundColor: string
+  ) {
     this.canvas = canvas;
     this.context = context;
     this.players = [];
diff --git a/front/volume/src/components/Pong/MapCustomization.svelte b/front/volume/src/components/Pong/MapCustomization.svelte
index 29b2f36..550734b 100644
--- a/front/volume/src/components/Pong/MapCustomization.svelte
+++ b/front/volume/src/components/Pong/MapCustomization.svelte
@@ -72,9 +72,21 @@
   <h1>Map Customization:</h1>
   <div>
     Width:
-    <input type="range" min={DEFAULT_MAP_SIZE.x} max=1000 bind:value={map.size.x} on:input={sizeChange} />
+    <input
+      type="range"
+      min={DEFAULT_MAP_SIZE.x}
+      max="1000"
+      bind:value={map.size.x}
+      on:input={sizeChange}
+    />
     Height:
-    <input type="range" min={DEFAULT_MAP_SIZE.y} max=800 bind:value={map.size.y} on:input={sizeChange} />
+    <input
+      type="range"
+      min={DEFAULT_MAP_SIZE.y}
+      max="800"
+      bind:value={map.size.y}
+      on:input={sizeChange}
+    />
   </div>
   <canvas
     bind:this={canvas}
diff --git a/front/volume/src/components/Pong/utils.ts b/front/volume/src/components/Pong/utils.ts
index ff3de0b..dc25088 100644
--- a/front/volume/src/components/Pong/utils.ts
+++ b/front/volume/src/components/Pong/utils.ts
@@ -32,10 +32,7 @@ export class Rect {
     this.size = size;
   }
 
-  draw(
-    context: CanvasRenderingContext2D,
-    color: string
-  ) {
+  draw(context: CanvasRenderingContext2D, color: string) {
     const offset: Point = new Point(this.size.x / 2, this.size.y / 2);
 
     context.fillStyle = color;