Thank you very much! Yeah, as for the constraint I was helped by the comment on the game jam page:
"...you can use this [constraint] to shape the theming of your game as well, there are plenty of other ways it can go, for example: Sales often run for a limited time only"
As all of my games are narrative and the impermanence of everything is a theme I currently like to write about, it seemed like a logical solution ^_^ ... Also the tool I use is just super basic (even if I hacked it a lot).