I am not able to figure out whats wrong with my code

from rest_framework import generics
from rest_framework import mixins
from rest_framework import viewsets
from rest_framework.response import Response
from rest_framework.views import APIView

from . import models
from . import serializers


class GameListCreate(generics.ListCreateAPIView):
    queryset = models.Game.objects.all()
    serializer_class = serializers.GameSerializer


class GameScoresList(generics.ListAPIView):
    queryset = models.Score.objects.all()
    serializer_class = serializers.ScoreSerializer

    def get_queryset(self):
        return self.queryset.filter(
            game_id=self.kwargs.get('game_pk')
        )


class PlayerViewSet(viewsets.ModelViewSet):
    queryset = models.Player.objects.all()
    serializer_class = serializers.PlayerSerializer

class GameViewSet(mixins.CreateModelMixin, mixins.RetrieveModelMixin, mixins.UpdateModelMixin, Viewsets.GenericViewSet):
    queryset = models.Game.objects.all()
    serializer_class = serializers.GameSerializer