Added New Item

[N00rAhmed]

Description

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I added a new Item called potion to my game. Also I refactored some of the code in my other function. Fixes #12

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Future Improvements

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Developer's checklist

• [ X] My PR follows the style guidelines of this project
• [ X] I have performed a self-check on my work

If changes are made in the code:

• [ X] I have followed the coding guidelines
• [ X] My changes in code generate no new warnings
• [ ] My changes are breaking another fix/feature of the project
• [ ] I have added test cases to show that my feature works
• [ X] I have added relevant screenshots in my PR