The
(you need an account to see links)is completely flash free, but I don't know really anything about how it works under the hood. Good news is that it's completely open source, so you can probably figure some stuff out by looking through the
(you need an account to see links). And actually from looking at the README, looks like it's React-based, which I would nooooooot be able to help with (I keep telling myself I'm going to learn some React basics and then running away).
The old DTI is also on github,
(you need an account to see links) if you want to take a look.
My browser visual experience is mostly limited to
(you need an account to see links), and with that, mostly limited to
(you need an account to see links). It seems like there have been a
(you need an account to see links) (you need an account to see links) games made with it (well, probably more, but I'm not gonna dig right now), but anyway, it's probably not the best tool for the job.
Anyway, sorry I don't have a better answer, but hope this can point you in some useful directions!