issue 320 - UI Alignment and Reduce enemy count

[AayushiJapsare15]

What does this PR do?

This PR addresses UI alignment and adjusts the enemy count. Previously, the spawnAlien function was called only once, causing the aliens to fall only a single time. With my changes, the enemy count is now adjusted based on the level, resulting in improved falling mechanics.

And for UI a very gamey look is give making the game look more professional and interesting.

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 diff levels

Mandatory Tasks

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

@YadavAkhileshh , could you kindly add the hacktoberfest-accepted and appropriate level labels to my PR? Thank you!

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our chaotic CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

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[github-actions]

🎉🎉 Thank you for your contribution! Your PR #514 has been merged! 🎉🎉

[AayushiJapsare15]

@YadavAkhileshh please add gssoc-ext , hacktoberfest-accepted and appropriate level label.

[AayushiJapsare15]

@YadavAkhileshh maybe you forgot to add labels to this pr.
Please add gssoc-ext, hacktoberfest-accepted and level label.