Okay, this isn't me, but consider doing this this month:
It is the Advent of Code for 2019
Unfortunately the fediverse is not a supporter or OAth so you will have to use Twitter, Google, Github to login.
@Absinthe Cool, thank you for posting. Hadn't heard of it till now.
From their About page:
@design_RG click events, I think it has been going on since 2015
