For the frontend for this I used Vue.JS as a learning experience. Overall it was straightforward and quite pleasant.
The hardest part was the mental process of giving up on server-side business logic enforcement (such as anti-cheating). At the end of the day ... "it's just a game" :)
TBH I've had it up as-is for a decade as a classical web app, but just converted it to a frontend-only app to eliminate most hosting costs.