Flappy Bird in Python

The folks over at r/dailyprogrammer posted a fun little problem today challenging users to create a simple text version the viral game "Flappy Bird." I managed to write and post my solution before anybody else got one up; its not the prettiest code in the world but it works.

 import random  
 starting_board = [line.strip() for line in open("challenge157H.txt").readlines()]  
 current_board = []  

 for line in starting_board:  
   b = []  
   for letter in line:  
     b.append(letter)  
   current_board.append(b)  

 bird_position = [bird for bird, line in enumerate(starting_board) for v in (line) if v[0]=="@"][0]  
 top_count = [i for i,v in enumerate(current_board[0][::-1]) if v=="#"][0]  
 bottom_count = [i for i,v in enumerate(current_board[-1][::-1]) if v=="#"][0]  
 next_top = random.choice(range(7,11))  
 next_bottom = random.choice(range(7,11))  
 score = 0  

 new_lines = ["..........","##........","###.......","####......",\  
 "##......##","###....###","####..####"]  

 def print_board(b):  
   for line in b:  
     print("".join(line))  
   print("------------------------------------------")  

 def advance_board():  
   global current_board, score  
   nextline1 = get_next_line()  
   nextline2 = get_next_line()  
   new_board = [line[2:]+[nextline1[i]]+[nextline2[i]] for i,line in enumerate(current_board)]  
   new_board[bird_position][1]="@"  
   passed1 = [line[2] for i,line in enumerate(current_board)]  
   passed2 = [line[3] for i,line in enumerate(current_board)]  
   if "#" in "".join(passed1):  
     score+=1  
   if "#" in "".join(passed2):  
     score+=1  
   current_board = new_board  

 def get_next_line():  
   global top_count, bottom_count,next_top,next_bottom  
   top_count+=1  
   bottom_count+=1  
   if top_count == next_top and bottom_count == next_bottom:  
     newline = random.choice(new_lines[4:])  
     next_top = random.choice(range(7,11))  
     next_bottom = random.choice(range(7,11))  
     top_count = 0  
     bottom_count = 0  
   elif top_count == next_top:  
     newline = random.choice(new_lines[1:4])  
     next_top = random.choice(range(7,11))  
     top_count = 0  
   elif bottom_count == next_bottom:  
     newline = random.choice(new_lines[1:4])[::-1]  
     next_bottom = random.choice(range(7,11))  
     bottom_count = 0  
   else:  
     newline = new_lines[0]  
   return newline  

 def play_flappy():  
   global bird_position  
   while True:  
     print_board(current_board)  
     print("Score:", score)  
     move = int(input("Enter a number 0-4"))  
     if move > 0:  
       bird_position-= move  
       if current_board[bird_position+(move//2)][2] =="#":  
         print("You ran into a wall!")  
         break  
     else:  
       bird_position+= 2  
       if current_board[bird_position-(1)][2] =="#":  
         print("You ran into a wall!")  
         break  
     if bird_position < 0 or bird_position > 9:  
       print("You fell off the map! Game Over!")  
       break  
     if current_board[bird_position][3] == "#":  
       print("You ran into a wall!")  
       break  
     advance_board()  

 play_flappy()  

The dailyprogrammer subreddit has gotten some new moderators and they are posting new problems much more consistently of late. My only complaint is that they tend not to be able to judge difficulty very well. They'll list something simple like writing upside text as a "Hard" problem and then things like computing levels of a  pascal's pyramid as easy.