I toyed with it some time ago and was impressed to see that -- in the raw data set -- each drawing is a time-series of strokes i.e. you get a person's drawing (of a penguin, the Mona Lisa, etc.) after 0.1 second of drawing, after 0.2 seconds, etc.
I made and (shameless plug!) sell giant algorithmically generated posters which illustrate and play with this idea: each group of 8 rows shows doodles after a decreasing number of seconds. It's fascinating to see how someone's drawing of a "koala" is pretty much set for "success" after a few strokes, while other drawings don't ever really improve with time... or how universal and "well-defined" are drawings of matchsticks, unlike those of kangaroos.
https://gumroad.com/l/quickdrawposter if anyone's ever so inclined!
Cheers