A simple (py)game

falling_blocks.py

import pygame
import random

width, height = (450, 600)
background_color = (10,10,10)

clock = pygame.time.Clock()
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Falling Blocks")
pygame.display.flip()

hero_block = pygame.rect.Rect((width/2-30,height-2*60,60,60))

running = True

enemy_block = pygame.rect.Rect((random.randint(0,width-60),-70,60,60))
enemy_block_attrs = {"speed": random.randint(5, 11),
                     "color": (random.randint(40,230),
                               random.randint(40,230),
                               random.randint(40,230))
                    }

while running:
    if enemy_block.topleft[1] > height or enemy_block.topright[1] > height:
        enemy_block = pygame.rect.Rect((random.randint(0,width-60),-70,60,60))
        enemy_block_attrs = {"speed": random.randint(5, 11),
                             "color": (random.randint(40,230),
                                       random.randint(40,230),
                                       random.randint(40,230))
                            }

    screen.fill(background_color)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    key = pygame.key.get_pressed()

    if key[pygame.K_LEFT]:
       hero_block.move_ip(-4, 0)
    if key[pygame.K_RIGHT]:
       hero_block.move_ip(4, 0)
    if key[pygame.K_UP]:
       hero_block.move_ip(0, -4)
    if key[pygame.K_DOWN]:
       hero_block.move_ip(0, 4)

    enemy_block.move_ip(0, enemy_block_attrs["speed"])
    pygame.draw.rect(screen, enemy_block_attrs["color"], enemy_block)
    pygame.draw.rect(screen, (220,220,220), hero_block)
    pygame.display.update()

    if hero_block.colliderect(enemy_block):
        # TODO: Show total seconds survived
        exit()

    clock.tick(60)