ThousandthStar: make-a-pong-clone-with-pygame

[ThousandthStar]

Closes issue #11

• [x] My project tutorial topic has already been aproved by the Codédex team
• [x] My project tutorial file renders properly in mdx
• [x] The content written is my own, and not plagiarized from other sources
• [x] All code written is commented or documented thoroughly
• [x] I have already completed a self-review of the project tutorial
• [x] I will comply with changes from the Codédex team about my project tutorial

NOTE: Missing header file. I'm assuming this will be created by the Codédex team.

[ThousandthStar]

Finished resolving all of the initial changes @Bobliuuu .