Memory Game

import pygame, random

class number(pygame.sprite.Sprite):
    def __init__(self, numeral):
        super().__init__()
        self.image1 = pygame.Surface((50, 50))
        self.image1.fill((255, 255, 100))
        self.image2 = font.render(f'{numeral}', True, (200, 200, 200))
        self.image = self.image2
        self.rect = self.image.get_rect()
        self.number = numeral
        self.rect.center = (random.randrange(50 ,750), random.randrange(50 ,550))

    def show_number(self):
        self.image = self.image2

    def hide_number(self):
        self.image = self.image1

pygame.init()
window = pygame.display.set_mode((800, 600))
font = pygame.font.Font('freesansbold.ttf', 50)
run = True

clock = pygame.time.Clock()
block_grp = pygame.sprite.Group()
limit = 3
timer = 0
score = 0
speed = 0

for x in range(limit):
    block = number(x+1)
    block_grp.add(block)

temp = True
while temp:
    clock.tick(30)

    window.fill((255, 255, 255))

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
            print("Quit")
            temp = False

        if event.type == pygame.MOUSEBUTTONDOWN:
            print("MBDOWN")
            mouseposition = pygame.mouse.get_pos()
            for d in block_grp:
                if d.rect.collidepoint(mouseposition):
                    speed = d.number
                    print("Clicked Number")
                    temp = False
                    block_grp.empty()

    window.blit(font.render(f'Select speed', True, (255, 150, 200)), (370, 10))
    block_grp.update()
    block_grp.draw(window)
    pygame.display.update()

while run:
    window.fill((255,255,255))
    for x in range(limit):
        block = number(x+1)
        block_grp.add(block)

    response = True
    current_number = 1
    while response:
        clock.tick(30)
        timer += 1
        window.fill((255, 255, 255))
        if timer > speed*30:
            for x in block_grp:
                x.hide_number()
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False
                response = False
            if event.type == pygame.MOUSEBUTTONDOWN and timer > 150:
                mouseposition = pygame.mouse.get_pos()
                for d in block_grp:
                    if d.rect.collidepoint(mouseposition):
                        if d.number == current_number:
                            d.kill()
                            block_grp.remove(d)
                            print(1)
                            current_number += 1
                        else:
                            run = False
                            response = False
        if len(block_grp) == 0:
            limit += 1
            response = False
            timer = 0
            score += 1

        window.blit(font.render(f'{score}', True, (255, 150, 200)), (370, 10))
        block_grp.update()
        block_grp.draw(window)
        pygame.display.update()
pygame.quit()