Add retry feature to Caterpillar game (Issue #277)

[1zj23]

Description

A short summary of what is included in your Pull Request.
This pull request introduces a new "Retry" feature to the Caterpillar game, addressing issue #277. With this feature, players can press the "R" key to restart the game immediately after the "GAME OVER" screen, providing a more fluid and enjoyable gaming experience.

The following changes were made:

Added a keybinding for the "R" key that restarts the game after it's over.
Improved the game loop to accommodate the retry feature without restarting the entire script.
Updated comments to explain the new functionality and ensure maintainability.
Fixes #(issue_no)

• Issue_no: <insert your issue no here>
• Not applicable

Type of change

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• New project insert
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Documentation Update

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