This was our first Game Jam, and we tried to cut down our ideas, and we still ended up with features that didn't make it in. We spent the first 5 hours after the theme announcement working on design and iterating on our ideas. What we produced is actually significantly different than what we started designing at first. Our coder didn't even touch a keyboard until after 8pm that night. It helped in the end, because we had a solid plan for the project, and knew we have no room to stray from what we finalized. A good experience all around.