On the Train Jam 2015, Maurizio and I made a little hardware game using an Arduino, some LEDs, a distance sensor, a speaker, and a bottle of amtrak water!
It behaves a bit like a digital theremin instrument, where players waves their hands at different heights and visual and audio feedback guide them through stages.
Hardware: Teensy 3.1, Neopixel LED ring, Minirig speaker, HS04 ultrasonic distance sensor.
Creators: Maurizio Scuiar, Robin Baumgarten
Made at the Train Jam 2015.