Bdring built his own Arduino-based 1D dungeon crawler inspired by Robin Baumgarten’s Line Wobbler:
I have been a Patron of Robin Baumgarten for a while. He makes experimental hardware for games. His Line Wobbler one dimensional dungeon crawler is my favorite and I have always wanted to play it. It uses a door stop spring as the controller. An accelerometer in the knob allows it to work like a joystick and also detect the wobble used to attack the enemies.
More details at Buildlog.net blog.