I came with two other Ideas that hopefully I will submit for the next jam, but never became a functional prototype. I think it is the same for many others of you and maybe it could be fun and interesting to see them now that the submission period is over, just to share them.
This one should have been about a soviet pilot in a mig-29 Fulcrum fighting on the German front in the Late Col War if it went Hot. The postcard would be the actual cockpit, where you keep tracks of resources with dices. A deck of card would be used to present you with the threats and their "aspect", "strength" and behaviour for you to fight them. On the left and the right side of the postcard there would have been counters and maneuvre to perform that you put "in play". Unfortunately I didn't have the time to figure out the details and make it a running prototype