I'm in (over my head)!
So I want to play around with some technologies... and recently rented a cheap Ubuntu 18.04 server...
So I'll be using: HTML5 + Javascript front-end (with some CSS formatting probably), jQuery for back-end calls... And on the back-end side (with Apache2) running Python Flask and probably an SQL database to allow for leaderboards or somesuch.
That's a lot of technology for a 48h game jam... but me working with things I'm not used to and making things a lot more complicated than need be has become sort of a tradition by now.
As for Art, Sound, etc? No clue. Probably simple stuff.