<s>[INST] You have been tasked with writing a Python program for a simple text-based game. The game will ask the player for their name and then ask them to choose a difficulty level. Based on the difficulty level, the user will be presented with a random math problem to solve within a certain time limit.

Here's a basic outline of how the program could work:

1. Get the player's name
2. Ask the player to choose a difficulty level (easy, medium, hard)
3. Based on the difficulty level, generate a random math problem
4. Present the math problem to the player
5. Set a time limit to solve the problem (e.g., 30 seconds)
6. Get the player's answer
7. Check if the player's answer is correct
8. If correct, give the player points and let them play again
9. If incorrect, deduct points and let them play again

Here is some code to get you started:

```python
import random
import time

# Constants
EASY_DIFFICULTY = 'easy'
MEDIUM_DIFFICULTY = 'medium'
HARD_DIFFICULTY = 'hard'

# Difficulty levels and their corresponding point values and time limits
DIFFICULTY_LEVELS = {
    EASY_DIFFICULTY: {'points': 10, 'time_limit': 30},
    MEDIUM_DIFFICULTY: {'points': 20, 'time_limit': 20},
    HARD_DIFFICULTY: {'points': 30, 'time_limit': 10}
}

# Function to generate a random math problem
def generate_math_problem(difficulty):
    if difficulty == EASY_DIFFICULTY:
        num1 = random.randint(1, 10)
        num2 = random.randint(1, 10)
        return f"What is {num1} + {num2}?[/INST]