Update main.py

[rohitgaikwad17]

Fixed Core Game Logic: Correctly identifies the foreground color of the text to validate the user's input, which resolves a bug in the original logic.

Improved User Experience: Replaces the separate "HIGH SCORE" window with a simple messagebox.showinfo() to display the final score and the new highest score, keeping the game flow within a single window.

Centralized Game State: Introduced a game_started flag to prevent multiple timers from running, ensuring the game functions correctly on subsequent plays.

Added Restart Functionality: A new reset_game() function allows the user to easily restart and play again after the timer runs out.

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