dungeon_game.py player error

import random

CELLS = [(0, 0), (0, 1), (0, 2),
         (1, 0), (1, 1), (1, 2),
         (2, 0), (2, 1), (2, 2)]

def get_locations():
  monster = random.choice(CELLS)
  door = random.choice(CELLS)
  start = random.choice(CELLS)

  if monster == door or monster == start or door == start:
    return get_locations()
  return monster, door, start


def move_player(player, move):
  x, y = player
  if move == 'LEFT':
    y -= 1
  elif move == 'RIGHT':
    y += 1
  elif move == 'UP':
    x -= 1
  elif move == 'DOWN':
    x += 1
  return x, y


def get_moves(player):
  moves = ['LEFT', 'RIGHT', 'UP', 'DOWN']
  if player[1] == 0:
    moves.remove('LEFT')
  if player[1] == 2:
    moves.remove('RIGHT')
  if player[0] == 0:
    moves.remove('UP')
  if player[0] == 2:
    moves.remove('DOWN')
  return moves

monster, door, start = get_locations()

while True:
  moves = get_moves(player)

  print("Welcome to the dungeon!")
  print("You're currently in room {}".format(player))
  print("You can move {}".format(moves))
  print("Enter QUIT to quit")

  move = input("> ")
  move = move.upper()

  if move == 'QUIT':
    break

  if move in moves:
    player = move_player(player, move)
  else:
    print("** Walls are hard. Stop walking into them! **")
    continue

  if player == door:
    print("You escaped!")
    break
  elif player == monster:
    print("You got eaten, dumbass!")
    break