Oh, and for sound you'd use Espruino's Waveform class - you should be able to get a few low-fi sound effects into an Espruino Pico.
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Oh, and for sound you'd use Espruino's Waveform class - you should be able to get a few low-fi sound effects into an Espruino Pico.