<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

#!/usr/bin/perl -w
my $bin = $ENV{"HACKENV"}."/bin"; if (defined($_=shift)) { s/ *$//;  s/ +/ @ /g; exec "$bin/@", $_ . " ? welcome.nl"; } else { exec "$bin/?", "welcome.nl"; }