Do also check out the other cool roughjs creations (https://github.com/rough-stuff), such as annotations (rough-notation: https://github.com/rough-stuff/rough-notation) and html elements (wired-elements: https://github.com/rough-stuff/wired-elements).

Shameless plug: I also created a dataviz library that uses roughjs under-the-hood: https://github.com/jwilber/roughViz