I really want a processing game contest, do we have one?
A past Processing game jams, 2018:
Many past game jam entries that were completed in Processing or p5js are tagged that way on itch.io:
Also @lmccandless has posted in the past about multiple gam jam submissions, such as “explodidungeon” and “starbreak.”
…finally, some classes, like on OpenProcessing, have created assignment based “game jam” showcases. Here is an example: