For my head-to-head pinball design, I wanted to make a game with two boards that were very similar in layouts and contrasting in theme. My design developed into a Summer vs. Winter theme rather quickly. With my theme set in stone, I began to draft out some elements that I knew I wanted to incorporate into the playfield, such as rubber band bumpers and ramps.
After sketching in some of the elements that I could easily think of for the summer themed field, I had do come up with some elements that could contrast nicely and thematically. I started with the umbrella bumpers and decided that some snowmen could be a nice comparison. After that, it was just finding similarly shaped or purposed pieces that could be added in as close to a symmetrical way as I wanted.