diff --git a/backend/src/main/java/de/szut/casino/lootboxes/LootBoxController.java b/backend/src/main/java/de/szut/casino/lootboxes/LootBoxController.java
index 5018914..540e4c5 100644
--- a/backend/src/main/java/de/szut/casino/lootboxes/LootBoxController.java
+++ b/backend/src/main/java/de/szut/casino/lootboxes/LootBoxController.java
@@ -1,91 +1,91 @@
-package de.szut.casino.lootboxes;
-
-import de.szut.casino.exceptionHandling.exceptions.InsufficientFundsException;
-import de.szut.casino.exceptionHandling.exceptions.UserNotFoundException;
-import de.szut.casino.user.UserEntity;
-import de.szut.casino.user.UserService;
-import jakarta.validation.Valid;
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.*;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.Optional;
-
-@RestController
-public class LootBoxController {
-    private final LootBoxRepository lootBoxRepository;
-    private final UserService userService;
-    private final LootBoxService lootBoxService;
-
-    public LootBoxController(LootBoxRepository lootBoxRepository, UserService userService, LootBoxService lootBoxService) {
-        this.lootBoxRepository = lootBoxRepository;
-        this.userService = userService;
-        this.lootBoxService = lootBoxService;
-    }
-
-    @GetMapping("/lootboxes")
-    public List<LootBoxEntity> getAllLootBoxes() {
-        return lootBoxRepository.findAll();
-    }
-
-    @PostMapping("/lootboxes/{id}")
-    public ResponseEntity<Object> purchaseLootBox(@PathVariable Long id) {
-        Optional<LootBoxEntity> optionalLootBox = lootBoxRepository.findById(id);
-        if (optionalLootBox.isEmpty()) {
-            return ResponseEntity.notFound().build();
-        }
-
-        LootBoxEntity lootBox = optionalLootBox.get();
-
-        Optional<UserEntity> optionalUser = userService.getCurrentUser();
-        if (optionalUser.isEmpty()) {
-            throw new UserNotFoundException();
-        }
-
-        UserEntity user = optionalUser.get();
-
-        if (lootBoxService.hasSufficientBalance(user, lootBox.getPrice())) {
-            throw new InsufficientFundsException();
-        }
-
-        RewardEntity reward = lootBoxService.determineReward(lootBox);
-        lootBoxService.handleBalance(user, lootBox, reward);
-
-        return ResponseEntity.ok(reward);
-    }
-
-    @PostMapping("/lootboxes")
-    public ResponseEntity<Object> createLootbox(@RequestBody @Valid CreateLootBoxDto createLootBoxDto) {
-        List<RewardEntity> rewardEntities = new ArrayList<>();
-
-        for (CreateRewardDto createRewardDto : createLootBoxDto.getRewards()) {
-            rewardEntities.add(new RewardEntity(createRewardDto.getValue(), createRewardDto.getProbability()));
-        }
-
-        LootBoxEntity lootBoxEntity = new LootBoxEntity(
-                createLootBoxDto.getName(),
-                createLootBoxDto.getPrice(),
-                rewardEntities
-        );
-
-        this.lootBoxRepository.save(lootBoxEntity);
-
-        return ResponseEntity.ok(lootBoxEntity);
-    }
-
-    @DeleteMapping("/lootboxes/{id}")
-    public ResponseEntity<Object> deleteLootbox(@PathVariable Long id) {
-        Optional<LootBoxEntity> optionalLootBox = lootBoxRepository.findById(id);
-        if (optionalLootBox.isEmpty()) {
-            return ResponseEntity.notFound().build();
-        }
-
-        LootBoxEntity lootBox = optionalLootBox.get();
-        lootBoxRepository.delete(lootBox);
-
-        return ResponseEntity.ok(Collections.singletonMap("message", "successfully deleted lootbox"));
-    }
-
-}
+package de.szut.casino.lootboxes;
+
+import de.szut.casino.exceptionHandling.exceptions.InsufficientFundsException;
+import de.szut.casino.exceptionHandling.exceptions.UserNotFoundException;
+import de.szut.casino.user.UserEntity;
+import de.szut.casino.user.UserService;
+import jakarta.validation.Valid;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+
+@RestController
+public class LootBoxController {
+    private final LootBoxRepository lootBoxRepository;
+    private final UserService userService;
+    private final LootBoxService lootBoxService;
+
+    public LootBoxController(LootBoxRepository lootBoxRepository, UserService userService, LootBoxService lootBoxService) {
+        this.lootBoxRepository = lootBoxRepository;
+        this.userService = userService;
+        this.lootBoxService = lootBoxService;
+    }
+
+    @GetMapping("/lootboxes")
+    public List<LootBoxEntity> getAllLootBoxes() {
+        return lootBoxRepository.findAll();
+    }
+
+    @PostMapping("/lootboxes/{id}")
+    public ResponseEntity<Object> purchaseLootBox(@PathVariable Long id) {
+        Optional<LootBoxEntity> optionalLootBox = lootBoxRepository.findById(id);
+        if (optionalLootBox.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        LootBoxEntity lootBox = optionalLootBox.get();
+
+        Optional<UserEntity> optionalUser = userService.getCurrentUser();
+        if (optionalUser.isEmpty()) {
+            throw new UserNotFoundException();
+        }
+
+        UserEntity user = optionalUser.get();
+
+        if (lootBoxService.hasSufficientBalance(user, lootBox.getPrice())) {
+            throw new InsufficientFundsException();
+        }
+
+        RewardEntity reward = lootBoxService.determineReward(lootBox);
+        lootBoxService.handleBalance(user, lootBox, reward);
+
+        return ResponseEntity.ok(reward);
+    }
+
+    @PostMapping("/lootboxes")
+    public ResponseEntity<Object> createLootbox(@RequestBody @Valid CreateLootBoxDto createLootBoxDto) {
+        List<RewardEntity> rewardEntities = new ArrayList<>();
+
+        for (CreateRewardDto createRewardDto : createLootBoxDto.getRewards()) {
+            rewardEntities.add(new RewardEntity(createRewardDto.getValue(), createRewardDto.getProbability()));
+        }
+
+        LootBoxEntity lootBoxEntity = new LootBoxEntity(
+                createLootBoxDto.getName(),
+                createLootBoxDto.getPrice(),
+                rewardEntities
+        );
+
+        this.lootBoxRepository.save(lootBoxEntity);
+
+        return ResponseEntity.ok(lootBoxEntity);
+    }
+
+    @DeleteMapping("/lootboxes/{id}")
+    public ResponseEntity<Object> deleteLootbox(@PathVariable Long id) {
+        Optional<LootBoxEntity> optionalLootBox = lootBoxRepository.findById(id);
+        if (optionalLootBox.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        LootBoxEntity lootBox = optionalLootBox.get();
+        lootBoxRepository.delete(lootBox);
+
+        return ResponseEntity.ok(Collections.singletonMap("message", "successfully deleted lootbox"));
+    }
+
+}
diff --git a/backend/src/main/java/de/szut/casino/lootboxes/LootBoxService.java b/backend/src/main/java/de/szut/casino/lootboxes/LootBoxService.java
index 647b69b..d80370e 100644
--- a/backend/src/main/java/de/szut/casino/lootboxes/LootBoxService.java
+++ b/backend/src/main/java/de/szut/casino/lootboxes/LootBoxService.java
@@ -1,40 +1,40 @@
-package de.szut.casino.lootboxes;
-
-import de.szut.casino.user.UserEntity;
-import de.szut.casino.user.UserRepository;
-import org.springframework.stereotype.Service;
-
-import java.math.BigDecimal;
-
-@Service
-public class LootBoxService {
-    private final UserRepository userRepository;
-
-    public LootBoxService(UserRepository userRepository) {
-        this.userRepository = userRepository;
-    }
-
-    public boolean hasSufficientBalance(UserEntity user, BigDecimal price) {
-        return user.getBalance().compareTo(price) < 0;
-    }
-
-    public RewardEntity determineReward(LootBoxEntity lootBox) {
-        double randomValue = Math.random();
-        BigDecimal cumulativeProbability = BigDecimal.ZERO;
-
-        for (RewardEntity reward : lootBox.getRewards()) {
-            cumulativeProbability = cumulativeProbability.add(reward.getProbability());
-            if (randomValue <= cumulativeProbability.doubleValue()) {
-                return reward;
-            }
-        }
-
-        return lootBox.getRewards().getLast();
-    }
-
-    public void handleBalance(UserEntity user, LootBoxEntity lootBox, RewardEntity reward) {
-        user.setBalance(user.getBalance().subtract(lootBox.getPrice()));
-        user.setBalance(user.getBalance().add(reward.getValue()));
-        userRepository.save(user);
-    }
-}
+package de.szut.casino.lootboxes;
+
+import de.szut.casino.user.UserEntity;
+import de.szut.casino.user.UserRepository;
+import org.springframework.stereotype.Service;
+
+import java.math.BigDecimal;
+
+@Service
+public class LootBoxService {
+    private final UserRepository userRepository;
+
+    public LootBoxService(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    public boolean hasSufficientBalance(UserEntity user, BigDecimal price) {
+        return user.getBalance().compareTo(price) < 0;
+    }
+
+    public RewardEntity determineReward(LootBoxEntity lootBox) {
+        double randomValue = Math.random();
+        BigDecimal cumulativeProbability = BigDecimal.ZERO;
+
+        for (RewardEntity reward : lootBox.getRewards()) {
+            cumulativeProbability = cumulativeProbability.add(reward.getProbability());
+            if (randomValue <= cumulativeProbability.doubleValue()) {
+                return reward;
+            }
+        }
+
+        return lootBox.getRewards().getLast();
+    }
+
+    public void handleBalance(UserEntity user, LootBoxEntity lootBox, RewardEntity reward) {
+        user.setBalance(user.getBalance().subtract(lootBox.getPrice()));
+        user.setBalance(user.getBalance().add(reward.getValue()));
+        userRepository.save(user);
+    }
+}
diff --git a/backend/src/main/java/de/szut/casino/slots/SlotService.java b/backend/src/main/java/de/szut/casino/slots/SlotService.java
index 7905636..4bdaa90 100644
--- a/backend/src/main/java/de/szut/casino/slots/SlotService.java
+++ b/backend/src/main/java/de/szut/casino/slots/SlotService.java
@@ -54,13 +54,12 @@ public class SlotService {
         SpinResult spinResult = new SpinResult();
         spinResult.setStatus(status.name().toLowerCase());
 
-        this.balanceService.subtractFunds(user, betAmount);
-
         if (status == Status.WIN) {
             BigDecimal winAmount = betAmount.multiply(winSymbol.getPayoutMultiplier());
             this.balanceService.addFunds(user, winAmount);
             spinResult.setAmount(winAmount);
         } else {
+            this.balanceService.subtractFunds(user, betAmount);
             spinResult.setAmount(betAmount);
         }
 
diff --git a/frontend/src/app/feature/game/blackjack/blackjack.component.ts b/frontend/src/app/feature/game/blackjack/blackjack.component.ts
index 56207b7..2763b55 100644
--- a/frontend/src/app/feature/game/blackjack/blackjack.component.ts
+++ b/frontend/src/app/feature/game/blackjack/blackjack.component.ts
@@ -51,19 +51,11 @@ export default class BlackjackComponent implements OnInit {
   debtAmount = signal(0);
 
   ngOnInit(): void {
-    // Initial user load from server
     this.userService.getCurrentUser().subscribe((user) => {
       if (user) {
         this.balance.set(user.balance);
       }
     });
-    
-    // Subscribe to user updates for real-time balance changes
-    this.userService.currentUser$.subscribe((user) => {
-      if (user) {
-        this.balance.set(user.balance);
-      }
-    });
   }
 
   private updateGameState(game: BlackjackGame) {
@@ -92,19 +84,9 @@ export default class BlackjackComponent implements OnInit {
     if (isGameOver) {
       console.log('Game is over, state:', game.state);
       this.userService.refreshCurrentUser();
-      
-      // Get the latest balance before showing the result dialog
-      timer(1000).subscribe(() => {
-        this.userService.getCurrentUser().subscribe((user) => {
-          if (user) {
-            this.balance.set(user.balance);
-            // Show the result dialog after updating the balance
-            timer(500).subscribe(() => {
-              this.showGameResult.set(true);
-              console.log('Game result dialog shown after delay');
-            });
-          }
-        });
+      timer(1500).subscribe(() => {
+        this.showGameResult.set(true);
+        console.log('Game result dialog shown after delay');
       });
     }
   }
@@ -183,20 +165,12 @@ export default class BlackjackComponent implements OnInit {
     this.blackjackService.doubleDown(this.currentGameId()!).subscribe({
       next: (game) => {
         this.updateGameState(game);
-        
-        // Wait a bit to ensure the backend has finished processing
-        timer(1000).subscribe(() => {
-          this.userService.getCurrentUser().subscribe((user) => {
-            if (user) {
-              this.balance.set(user.balance);
-              if (user.balance < 0) {
-                this.debtAmount.set(Math.abs(user.balance));
-                this.showDebtDialog.set(true);
-              }
-            }
-          });
+        this.userService.getCurrentUser().subscribe((user) => {
+          if (user && user.balance < 0) {
+            this.debtAmount.set(Math.abs(user.balance));
+            this.showDebtDialog.set(true);
+          }
         });
-        
         this.isActionInProgress.set(false);
       },
       error: (error) => {
@@ -210,13 +184,7 @@ export default class BlackjackComponent implements OnInit {
   onCloseGameResult(): void {
     console.log('Closing game result dialog');
     this.showGameResult.set(false);
-    
-    // Refresh the balance when dialog is closed and update local state
-    this.userService.getCurrentUser().subscribe((user) => {
-      if (user) {
-        this.balance.set(user.balance);
-      }
-    });
+    this.userService.refreshCurrentUser();
   }
 
   onCloseDebtDialog(): void {
diff --git a/frontend/src/app/feature/game/slots/slots.component.css b/frontend/src/app/feature/game/slots/slots.component.css
index c1fa452..0df9046 100644
--- a/frontend/src/app/feature/game/slots/slots.component.css
+++ b/frontend/src/app/feature/game/slots/slots.component.css
@@ -1,3 +1,15 @@
+/* Open button styling - Matches lootbox component style */
+.open-btn {
+  background: linear-gradient(90deg, #4338ca 0%, #8b5cf6 100%);
+  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
+  transition: all 0.2s ease;
+}
+.open-btn:hover {
+  background: linear-gradient(90deg, #4f46e5 0%, #a78bfa 100%);
+  transform: translateY(-2px);
+  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.3);
+}
+
 /* Symbol colors */
 .symbol-BAR {
   color: var(--color-accent-yellow);
diff --git a/frontend/src/app/feature/game/slots/slots.component.html b/frontend/src/app/feature/game/slots/slots.component.html
index c5929df..7b0a850 100644
--- a/frontend/src/app/feature/game/slots/slots.component.html
+++ b/frontend/src/app/feature/game/slots/slots.component.html
@@ -74,8 +74,9 @@
 
             <button
               (click)="spin()"
-              class="button-primary px-4 py-1.5 font-bold"
+              class="px-4 py-1.5 font-bold rounded"
               [ngClass]="{
+                'open-btn': hasEnoughBalance(),
                 'bg-gray-500 cursor-not-allowed': !hasEnoughBalance(),
               }"
               [disabled]="isSpinning || !hasEnoughBalance()"
diff --git a/frontend/src/app/feature/game/slots/slots.component.ts b/frontend/src/app/feature/game/slots/slots.component.ts
index b43e8f0..f50fad2 100644
--- a/frontend/src/app/feature/game/slots/slots.component.ts
+++ b/frontend/src/app/feature/game/slots/slots.component.ts
@@ -109,20 +109,17 @@ export default class SlotsComponent implements OnInit, OnDestroy {
       next: (result) => {
         setTimeout(() => {
           this.slotResult.set(result);
-          
+
           if (result.status === 'win') {
             this.userService.updateLocalBalance(result.amount);
           }
-          
-          this.userService.refreshCurrentUser();
-          
+
           this.isSpinning = false;
         }, 1500);
       },
       error: (err) => {
         console.error('Error spinning slot machine:', err);
         this.userService.updateLocalBalance(betAmount);
-        this.userService.refreshCurrentUser();
         this.isSpinning = false;
       },
     });
diff --git a/frontend/src/app/feature/transaction-history/transaction-history.component.ts b/frontend/src/app/feature/transaction-history/transaction-history.component.ts
index 338ef4e..dabc255 100644
--- a/frontend/src/app/feature/transaction-history/transaction-history.component.ts
+++ b/frontend/src/app/feature/transaction-history/transaction-history.component.ts
@@ -1,11 +1,4 @@
-import {
-  ChangeDetectionStrategy,
-  Component,
-  EventEmitter,
-  inject,
-  Input,
-  Output,
-} from '@angular/core';
+import { ChangeDetectionStrategy, Component, EventEmitter, inject, Input, Output } from '@angular/core';
 import { TransactionService } from '@service/transaction.service';
 import { Observable } from 'rxjs';
 import { AsyncPipe, CurrencyPipe, DatePipe, NgIf } from '@angular/common';
diff --git a/frontend/src/app/service/user.service.ts b/frontend/src/app/service/user.service.ts
index 88db765..d7199b3 100644
--- a/frontend/src/app/service/user.service.ts
+++ b/frontend/src/app/service/user.service.ts
@@ -13,19 +13,6 @@ export class UserService {
   private http: HttpClient = inject(HttpClient);
   private authService = inject(AuthService);
 
-  constructor() {
-    // Initialize with the current user from AuthService if available
-    const currentUser = this.authService.getUser();
-    if (currentUser) {
-      this.currentUserSubject.next(currentUser);
-    }
-
-    // Subscribe to auth service user updates
-    this.authService.userSubject.subscribe(user => {
-      this.currentUserSubject.next(user);
-    });
-  }
-
   public getCurrentUser(): Observable<User | null> {
     return this.http.get<User | null>('/backend/users/me').pipe(
       catchError(() => EMPTY),
diff --git a/frontend/src/app/shared/components/navbar/navbar.component.ts b/frontend/src/app/shared/components/navbar/navbar.component.ts
index cd252f3..5d44f60 100644
--- a/frontend/src/app/shared/components/navbar/navbar.component.ts
+++ b/frontend/src/app/shared/components/navbar/navbar.component.ts
@@ -10,7 +10,6 @@ import { RouterModule } from '@angular/router';
 import { AuthService } from '@service/auth.service';
 import { Subscription } from 'rxjs';
 import { AnimatedNumberComponent } from '@blackjack/components/animated-number/animated-number.component';
-import { UserService } from '@service/user.service';
 
 @Component({
   selector: 'app-navbar',
@@ -22,11 +21,9 @@ import { UserService } from '@service/user.service';
 export class NavbarComponent implements OnInit, OnDestroy {
   isMenuOpen = false;
   private authService: AuthService = inject(AuthService);
-  private userService: UserService = inject(UserService);
   isLoggedIn = this.authService.isLoggedIn();
 
   private authSubscription!: Subscription;
-  private userSubscription!: Subscription;
   public balance = signal(0);
 
   ngOnInit() {
@@ -35,22 +32,10 @@ export class NavbarComponent implements OnInit, OnDestroy {
         this.balance.set(user?.balance ?? 0);
       },
     });
-
-    // Also subscribe to UserService for real-time balance updates
-    this.userSubscription = this.userService.currentUser$.subscribe({
-      next: (user) => {
-        if (user) {
-          this.balance.set(user.balance);
-        }
-      },
-    });
   }
 
   ngOnDestroy() {
     this.authSubscription.unsubscribe();
-    if (this.userSubscription) {
-      this.userSubscription.unsubscribe();
-    }
   }
 
   logout() {