I was hoping "Don't Stop" was going to be the winning theme. You know, for something to do with cars, or rather busses and boats. But when the "You Can't See Everything" was announced I had an immediate draw to extend the Archer game I just spent 7 weeks creating. Obviously just adding a feature to a built game is against the rules and spirit of a game jam, so I would have to find a way to cut some corners and build it in much shorter time.
Luckily due to experience and knowing how the big project was structured it took a mere 4 hours to get get basic control, arrows flying, arrows colliding with ground and arrows colliding with an entity, spiders. This includes extremely basic/roughed out art.