迷宫游戏 - 游戏随机停止

Question

我的迷宫游戏的另一个问题，它有时运行良好，但似乎在一些输入之后游戏停止了？不太清楚这里发生了什么。

import random
from random import randint


print("Welcome to Brandon's Maze Game",
  "You have to get 10 shields or find the exit to win",
  "Good Luck :D")


counter = 0
shields = 3
fate = randint(1,2)
direction = input("You have come to a stop, do you want to turn Left(L) or Right(R)? ")

if direction == "L":
if fate == 1:
    fate = randint(1,2)
    shields += 3
    counter += 1
    direction = input("You came across a chest, you now have " + str(shields) + " shields! What way do you want to go next? Left(L) or Right(R)? ")
if fate == 2:
    fate = randint(1,2)
    shields -= 1
    counter += 1
    direction = input("Uh oh, you got attacked and lost a shield, you now have " + str(shields) + " shields. Do you want to go Left(L) or Right(R)? ")

if direction == "R":
if fate == 1:
    fate = randint(1,2)
    shields += 3
    counter += 1
    direction = input("You came across a chest, you now have " + str(shields) + "! What way do you want to go next? Left(L) or Right(R)? ")
if fate == 2:
    fate = randint(1,2)
    shields -= 1
    counter += 1
    direction = input("Uh oh, you got attacked and lost a shield, you now have " + str(shields) + " shields. Do you want to go Left(L) or Right(R)? ")

if counter >= 5:
    print("Congratulations, you made it to the end with " + str(shields) + " shields.")

if shields == 0:
print("You lost all your shields, Game over.")

请尽可能简单地解释一下，我对python来说还是个新手。如果可以，请告诉我正确的代码，但也要解释原因。