@magdesign I think that's not the way you want to go.
Apps would be confined anyway so you should include dependencies in the app.
The way to go, it should be adding pygame to the clickable.yml
I don't know if you need to add a way of doing pip install pygame that would add them in the local folder (to be confirmed)
https://clickable-ut.dev/en/latest/project-config.html#libraries