This is the best UI for decision-making I've seen lately. Font choosing is a pain and this works. I ended choosing the font i know (roboto mono) but wau, before this it was because always like that. Now i know that's the one i like ^^
Would love to hear your thoughts or anyone else's.
(Fun aside: I ended up implementing the Ford Johnson algorithm to minimize the number of comparisons, explanation here: https://github.com/decidedlyso/merge-insertion-sort )