I truly enjoyed the concept of making progress on one of your past prototypes.
It makes it slightly unfair to rate/compare since the games don't start at the same position. Some of our past prototypes might've been more fleshed out than others.
But having a jam that doesn't force you to make one more unfinished thing and instead asks you to take a look at your graveyard of prototypes and revive one, that was very very cool!