ArnavUpadhyay7/Zentra ? reverse-engineered prompt

Build me a simple browser based 2D hangout app like a tiny virtual room where people can instantly create or join a room and walk around with WASD. I want it to feel zero friction, no signup or login, just open it and start. When players get close to each other, voice chat should automatically work, and when they move away it should stop or fade naturally. I also want a nearby text chat so messages are only visible to people close enough in the space.

Make movement smooth and synced in real time for multiple users, with a clean fun interface that feels casual and easy to use for study groups, quick meetings, or just hanging out. There should be a simple landing flow for creating or joining a room fast, then a 2D world where you can see other people moving around. Please set up both frontend and backend so it runs locally and is ready to deploy. If anything is unclear, look up current docs online and make sensible choices that match this idea.