The game got started by Pénélope Bagieu on Twitter, and it's very simple: draw your ideal environment for your quarantine, based on a template provided by acupoftim.

The results are impressive, even though for the time being the initiative has been picked up mostly by French or French-speaking artists.

I'm really not good at drawing, therefore my contribution so far has only been to make a vector (SVG) version of the the template:

An empty room with a staircase going up on the left. Another staircase coming in from below can be seen under it.
Coronavirus template (SVG vector graphics)