Another game you actually enjoyed (which was not part of a compo) was Hibernated 1 Director’s Cut, thanks again for your five star rating 
Not sure if you didn’t pick it because it’s based on an original story I did in 2018? In every aspect, whether it’s narrative, technically or in terms of the game-design, the Director’s Cut is a complete rewrite, which only shares the basic story with the original game. Not sure though how the rules for the XYZZY Award are.
In terms of technical achievements I would definitely add @ChristopherDrum’s StatusLine Z-Machine interpreter for the Pico-8 (it’s super cool) and definitely @sijnstra’s M4ZVM.
My Puddle BuildTools had a large impact on those who use PunyInform to target retro systems, it might be worth an inclusion as well.
Hope this helps 