After almost 2 hours of thinking, I have locked down my concept.
I will be working on an Unfolding game, centering around the research for the Eternal Life.
As you work to reach your goal, you will need to find ways to gain money to make it further.
(Further information in the pastebin: https://pastebin.com/vazmu2H0)
As previously mentionned, I am streaming the event on my side. (Although I am currently muted)
After one-hour's thinking, I've finally got my idea about the theme Alchemy! So it's basically a 2D parkour game, which obstacles and enemies are elimiated with potions - you may have known already: potions need to be produced with your mastered alchemy skils
So here's my gameplay design, if you are interested:
First Jam ever.
Edit (now that the infernal pressure of the countdown is over) :
I will do something in Python 2.7.
It is going to be a console/terminal/whatever-you-want-to-call-the-black-box-with-a-blinking-cursor game.
I will eat thaï food whilst working on it.
This is live from the nightdesk of a three star hotel in Paris.