This is a portable version of volumouse for direct download. You will just need to install depencies.
For doing that, : inside this extracted folder run in a terminal python3 -m pip install -r requirements.txt
then you can directly configure volumouse with python3 'volumouse.py' --configure
then execute volumouse : python3 volumouse.py
Fix error 'list index out of range' when no sound card is configured in volumouse -c
thanks to @Heart1010