One UX feature I wish existed on the NYT game that you should add here is that I wish I could organize my dominoes. E.g. I wish I could put all the pieces with a zero into part of my playing area.
I'd be happy with a "highlight dominoes" picker. Ticking zero would highlight the dominoes with zero, then you could also tick four, and you'd be left with only pieces that satisfy both.
Ideally it highlights matches in the tray and on the playing field.
Pips is easily my new favorite NYT game apart from the daily (full) Crossword. Forces me to use my brain in a way the other games don't. Would love to be able to play this more than once a day.