Yea, I've never played a game that uses WASD for one game object and Arrows for another. I thought I was a genius inventing that. lol - then I came across a bunch of other games that do the same thing.
I find that for game jams whatever your first idea is is usually the same idea as a lot of other people. so if I want to try to interpret it in a really different way I keep thinking and thinking and usually nothing comes lol