new feature: sideway movement animation

[gabrielaramburu]

👉 Checklist

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• [x ] I have reviewed my submission thoroughly.
• [x ] I have tested my code (if submission is related to coding) and run the game before pushing (to make sure the project compile).
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✍ Description of the Pull Request

I have implemented the sideway animation of the spaceship.

🔗 Issue link

Issue reference number and link goes here e.g. 'Fixes/Closes #<issue_number>'.

• This Pull Request fixes the issue : 'Closes #'
• [ X] This Pull Request does not fix an issue.

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[jvondermarck]

Well done, thank you so much for your work ! And sorry for the late review of your PR.

[gabrielaramburu]

No problem, I think the animation can be improved if other image (I put the image of the ship without any modification) is used in the shadow.
best regards

[jvondermarck]

The animation looks really good, you still can make some updates if you want, you're free to do everything you want :)