简单的Python 3加法游戏

import random
import time

def addition_game():
    score = 0
    start_time = time.time()
    
    while True:
        num1 = random.randint(1, 10)
        num2 = random.randint(1, 10)
        correct_answer = num1 + num2
        
        print(f"What is the sum of {num1} and {num2}?")
        
        try:
            user_answer = int(input("Enter your answer: "))
        except ValueError:
            print("Invalid input. Please enter a valid integer.")
            continue
        
        if user_answer == correct_answer:
            score += 1
            print("Correct!")
        else:
            print("Incorrect!")
        
        elapsed_time = time.time() - start_time
        if elapsed_time >= 60:
            break
        
    print(f"Game over! Your score is {score}.")

addition_game()