Проблема с астероидами

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import pygame as pg
import random as rand
 
 
pg.init()
win = pg.display.set_mode((1270, 720))
run = True
ast = [pg.image.load(f'asteroid/{i}.png') for i in range(6)]
bullet = pg.image.load('bullet.png')
ship = {
    5: pg.image.load('ship/ship_5.png'),
    4: pg.image.load('ship/ship_4.png'),
    3: pg.image.load('ship/ship_3.png'),
    2: pg.image.load('ship/ship_2.png'),
    1: pg.image.load('ship/ship_1.png')
}
bg = pg.image.load('bg.png')
bg_c = 0
astr = []
bul = []
ast_charge = 30
 
 
class Player:
    x = 625
    y = 345
    hp = 5
    point = 0
    charge = 29
 
    def damage(self):
        self.hp -= 1
 
    def dead(self):
        global run
        run = False
 
    def draw(self):
        win.blit(ship[self.hp], (self.x, self.y))
 
    def move(self):
        global bul, keys
        keys = pg.key.get_pressed()
        if keys[pg.K_ESCAPE]:
            quit()
        if keys[pg.K_UP] and self.y > 0:
            self.y -= 10
        if keys[pg.K_DOWN] and self.y < 690:
            self.y += 10
        if keys[pg.K_RIGHT] and self.x < 1250:
            self.x += 10
        if keys[pg.K_LEFT] and self.x > 0:
            self.x -= 10
        if keys[pg.K_SPACE] and self.charge >= 7:
            self.char = 0
            bul.append([self.x+10, self.y])
 
 
pl = Player
 
 
class Asteroid:
    def __init__(self, x, y, pic, move_x, move_y):
        self.x = x
        self.y = y
        self.pic = pic
        self.move_x = move_x
        self.move_y = move_y
 
    def draw(self):
        win.blit(self.pic, (self.x, self.y))
 
    def move(self):
        self.x += self.move_x
        self.y += self.move_y
        if self.x < 0:
            self.x = 1270
        if self.x > 1270:
            self.x = 0
        if self.y < 0:
            self.y = 720
        if self.y > 720:
            self.y = 0
 
 
def spawn():
    global ast_charge
    if ast_charge >= 30:
        x, y = rand.choice([-30, 1270]), rand.choice([-30, 720])
        pic = rand.choice(ast)
        move_x = rand.randint(-10, 10)
        move_y = rand.randint(-10, 10)
        astr.append(Asteroid(x, y, pic, move_x, move_y))
        ast_charge = 0
    else:
        ast_charge += 1
 
 
def fill():
    global bg, bg_c, win
    win.blit(bg, (0, -1440+bg_c))
    bg_c += 1
    if bg_c == 1440:
        bg_c = -0
 
 
v = 50
f1 = pg.font.Font(None, 50)
text3 = f1.render('Уворачивайтесь от астеройдов,', 1, (254, 254, 254))
text4 = f1.render('и стреляйте по ним, чтобы получать очки',
                  1, (254, 254, 254))
 
while run:
    pg.time.delay(30)
 
    Player.move(pl)
    fill()
    for asteroid in astr:
        asteroid.draw()
        asteroid.move()
    Player.draw(pl)
    if v:
        v -= 1
        win.blit(text3, (400, 300))
        win.blit(text4, (350, 350))
    text1 = f1.render('HP = '+str(pl.hp), 1, (255, 255, 255))
    text2 = f1.render(str(pl.point), 1, (255, 255, 255))
    win.blit(text1, (1100, 100))
    win.blit(text2, (100, 100))
    for r in pg.event.get():
        if r.type == pg.QUIT:
            quit()
    spawn()
    # print(astr)
    pg.display.update()