Thank you for playing and for your kind words.
You are right that rules variants would be a good addition. I think as far as this PICO-8 version goes, though, it's not likely to happen. I was already running up against the "token limit" that PICO-8 enforces. Worth exploring, though, thank you.
I think for this version the next step is ironing out the bugs, getting the UI/UX a little tighter (for lack of a better word), and then getting it on the PICO-8 BBS: https://www.lexaloffle.com/bbs/?cat=7
As for a retail version, I'd probably rebuild it in something like Unity. Lots of options. I don't know the details of selling a PICO-8 game, and it generally seems (imo) against the spirit of the whole thing. I'd also want to arrange a deal or something with the rules creator since he did most of the work!
For the Steam Deck specifically, I might be able to get it working on there with this version. I have one available to try it out at least. I know I got this running on another smaller, cheaper Linux handheld. I will investigate and report back.