While the other #uxn folks are doing interesting and exiting things, I have been plodding on with the more mundane: an interpreter that aims to give warnings and error messages that are suitable for learners of Uxntal. Thanks to one of my students I got a JavaScript version with a web frontend. You can try it out at https://limited.systems/yaku/ but really, https://wiki.xxiivv.com/etc/uxnrepl/index.html is probably a better choice.