UI enhancement and alien count adjustment.

[AayushiJapsare15]

What does this PR do?

Reduced bugs across both backend and frontend for smoother gameplay.
Enhanced UI components to improve the visual experience.
Adjusted alien count dynamically based on the selected difficulty mode.

Fixes #320

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Chore (refactoring code, technical debt, workflow improvements)

How should this be tested?

• Try all three modes.

Mandatory Tasks

• Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.

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[AayushiJapsare15]

@YadavAkhileshh Please add hacktoberfest-accpeted label, as it is not accepting this PR and others as well.

[aditya-bhaumik]

@YadavAkhileshh hi community manager this side

can you please inform the contributors why their pull requests are not getting merged? If it's due to conflicts, you can let them know and provide guidance on resolving them.