The game doesn't have to be long. In fact the judges will only play each game for about an hour. That means I really need to tighten things up here.
The game I will submit will be a survival simulator, with the goal of going as far South as possible before having to return home. The player will be reliving all the events that Shackleton, Scott, and Wilson experienced so he/she will have to make educated evaluations about how much risk there is in continuing South. Meanwhile, the historic events from that journey will play out through dialogue, journal entries, and survival tasks - fleshing out the characters and adding context to the player's actions.
Not an impossible job to do, just difficult. 28 Days and counting!