Grok 2 Mini:
import pygame
import random

# Initialize Pygame
pygame.init()

# Constants
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
LINE_WIDTH = 10
FPS = 60

# Colors
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
GREEN = (0, 255, 0)

# Setup
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("L vs A Game")
clock = pygame.time.Clock()

# Game variables
line_position = SCREEN_WIDTH // 2
line_speed = 10
line_direction = 1  # 1 for right, -1 for left
game_over = False
button_pressed = False

# Player controls
A_KEY = pygame.K_a
L_KEY = pygame.K_l

def move_line():
    global line_position, line_direction
    if not button_pressed:
        line_position += line_speed * line_direction
        if line_position <= 0 or line_position >= SCREEN_WIDTH:
            line_direction *= -1
            line_position += line_speed * line_direction

def check_game_over():
    global game_over
    if line_position <= 0 or line_position >= SCREEN_WIDTH:
        game_over = True

def draw_game():
    screen.fill(BLACK)
    pygame.draw.line(screen, WHITE, (line_position, 0), (line_position, SCREEN_HEIGHT), LINE_WIDTH)
    pygame.draw.rect(screen, RED if line_direction == 1 else GREEN, (0, 0, line_position, SCREEN_HEIGHT), 0)
    pygame.draw.rect(screen, GREEN if line_direction == 1 else RED, (line_position, 0, SCREEN_WIDTH - line_position, SCREEN_HEIGHT), 0)

    if game_over:
        font = pygame.font.Font(None, 74)
        text = font.render("Game Over!", True, WHITE)
        text_rect = text.get_rect(center=(SCREEN_WIDTH // 2, SCREEN_HEIGHT // 2))
        screen.blit(text, text_rect)

    pygame.display.flip()

# Main game loop
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == A_KEY and line_direction == -1:
                button_pressed = True
            elif event.key == L_KEY and line_direction == 1:
                button_pressed = True
        elif event.type == pygame.KEYUP:
            if event.key in [A_KEY, L_KEY]:
                button_pressed = False

    if not game_over:
        move_line()
        check_game_over()

    draw_game()
    clock.tick(FPS)

pygame.quit()