Added New Game

[Saipradyumnagoud]

PR Description 📜

Added New Game 15_puzzle sliding game
Fixes #4644

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Mark the task you have completed ✅

• [x ] I follow CONTRIBUTING GUIDELINE & CODE OF CONDUCT of this project.
• [x ] I have performed a self-review of my own code or work.
• [x ] I have commented my code, particularly in hard-to-understand areas.
• [ x] My changes generates no new warnings.
• [x ] I have followed proper naming convention showed in CONTRIBUTING GUIDELINE
• [ x] I have added screenshot for website preview in assets/images
• [x ] I have added entries for my game in main README.md
• [x ] I have added README.md in my folder
• [x ] I have added working video of the game in README.md (optional)
• [ x] I have specified the respective issue number for which I have requested the new game.

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[kunjgit]

Thank you @Saipradyumnagoud ,for creating the PR and contributing to our GameZone 💗
Review team will review the PR and will reach out to you soon! 😇
Make sure that you have marked all the tasks that you are done with ✅.
Thank you for your patience! 😀

[kunjgit]

Hey @Saipradyumnagoud, You have reached your limit to contribute in GameZone with a score of 165.
We believe in giving equal opportunity to everyone so you will not be able to contribute to GameZone now onwards. 💗
Thank you for your valuable time and contribution in GameZone 🕹️!

Your merged pull requests:

• #4619 with labels: level2 score: (25)
• #4555 with labels: level3 score: (45)
• #4468 with labels: level2 score: (25)
• #4433 with labels: level2 score: (25)
• #4270 with labels: level3 score: (45)

[kunjgit]

Thank you @Saipradyumnagoud , for your valuable time and contribution in our GameZone 💗.
It’s our GameZone, so Let’s build this GameZone altogether !!🤝
Hoping to see you soon with another PR again 😇
Wishing you all the best for your journey into Open Source🚀