Implement Level Progression and Difficulty

[Just-Here-TO-Code]

Description:

Introduce multiple levels or difficulty progression to make the game more engaging and replayable.

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Tasks:

• Add at least 3 levels with distinct difficulty scaling
• Gradually increase obstacle speed, spawn rate, or complexity
• Use background changes to differentiate levels
• Add a level selection screen

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Code of Conduct

• I agree to follow this project's Code of Conduct

[PresenceOP-Coder]

@Just-Here-TO-Code assign me this issue please will complete as fast as i can