如何使事件仅在 Python/pygame 中的 veriable 为 true 时发生

我已经做到了，如果你点击你会转到屏幕中间，但我只希望当你在死亡屏幕上时发生这种情况，当你离开屏幕时会发生这种情况我该如何做，这样点击只有在死亡时才起作用屏幕显示

我尝试过的：

import pygame
import random

SCREEN_WIDTH = 800
SCREEN_HIEGHT = 600

gravity = 4

pygame.init()
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HIEGHT))

bg_image = pygame.image.load('Background.png')
bg_rect = bg_image.get_rect()

losing_image = pygame.image.load('losing screen.png')
losing_rect = losing_image.get_rect()

player_image = pygame.image.load('Character.png')
player_rect = player_image.get_rect()
player_rect.x = 30
player_rect.y = 300

dead = False

clock = pygame.time.Clock()
run = True
score = 0
while run:
     
    for event in pygame.event.get():
        if event.type == pygame.MOUSEBUTTONDOWN:
            player_rect.y = 300
            player_rect.x= 30
        if event.type == pygame.QUIT:
            run = False
             
    key = pygame.key.get_pressed()
    if key[pygame.K_w]:
        player_rect.y -= 7
    
    if player_rect.y < 790:
        player_rect.y += gravity
    
    
    screen.fill((0,0,0))
    screen.blit(bg_image, bg_rect)
    screen.blit(player_image, player_rect, )
    if player_rect.y >= 580:
        dead = True
        screen.blit(losing_image, losing_rect)
    
        

    pygame.display.flip()    
    pygame.display.update() 
    clock.tick(60) 

pygame.quit()