Woah, writing something that just so happens to be in 7/4 is such a crazy idea to me. Thats really cool though! The last game jam I wrote music for was a rhythm game and we went out of our way to use non 4/4 time signatures for most of the songs. It was really fun. Normally when I improve or write down what I hear in my head it's almost always in 4/4. I gotta listen to more math rock lol