Simple Multiplayer Game

This is simple multiplayer game using Python (Flask, Flask-Socketio), HTML and Javascript. It's base comes from playlist

How can I execute this

First, make a virtual environment and activate it:

python -m venv venv
source ./venv/bin/activate
pip install -r requirements.txt

Second, execute file server.py

python ./server.py

Third, access localhost address: 127.0.0.1:3000

Please, help-me improve this if you can. Let's fun.