dungeon game can't move DOWN

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

def draw_map(player):
  print(' _ _ _')
  tile = '|{}'
  for idx, cell in enumerate(CELLS):
    if idx in [0,1,3,4,6,7]:
      if cell == player:
        print(tile.format('x'),end='')
      else:
        print(tile.format('_'),end='')
    else:
      if cell == player:
        print(tile.format('x|'))
      else:
        print(tile.format('_|'))


monster, door, player = get_locations()
print("Welcome to the dungeon!")

while True:
  moves = get_moves(player)


  print("You're currently in room {}".format(player)) 

  draw_map(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
  if player == monster:
    print("**You were eaten by the grue!**")
    break