Putting web development skills to use for a less serious project can be a refreshing and invigorating break from routine professional tasks. A project like creating a web-based version of the classic game Pong can serve as both a fun diversion and a means to refine one's coding and design skills.
Moreover, creating Pong can also expose developers to important aspects of user interface (UI) and user experience (UX) design. For example, developers can experiment with different control schemes (e.g., mouse vs. keyboard controls), layout designs, and feedback mechanisms (e.g., sounds or visual effects when the ball hits a paddle).
Finally, building a Pong game can be a good opportunity to get hands-on experience with modern development tools and practices. Developers can use version control systems like Git to track their code changes.
All in all, working on a seemingly simple project like a Pong game can be a surprisingly rich opportunity to practice and refine one's front-end development skills. And perhaps just as importantly, it can remind developers of the joy and excitement that often accompany creative coding projects.