there is a Open issue from 2017 about pressure sensitivity [1] but seems like the author does not plan to actively maintain the project.

Honestly I'll play around a little to see if can quickly add that functionality.

[1] https://github.com/dli/paint/issues/9

EDIT: Just made a quick and dirty pull request, a live version here: https://brushpaint.pages.dev/ Now If someone puts more time into this they could: Add support for tilted pens (Change bristle direction based on tilt, my pen doesn't support tilt.) Also the scaling is linear, which is probably not perfect.

I'm using a Wacom cth-470. The pen works on chrome but not on Firefox. Unfortunately there's no pressure sensitivity as far as I can tell.