You could always make a 'jam version' of the game, which you keep the way it was after the 40 hours, and an upgraded version which gets updates and all that
I'm glad you feel that way! This team is gathered just for the purpose of this jam and we all have different projects/plans we are working on so us continuing this project seems unlikely.
These jam projects are experiments for our future bigger projects. Hopefully we'll be making much better versions of each in future.