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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.
@Gordon
That looks great - and amazing write-up!
I guess for the LEDs you could try wiring them up in a matrix so that they can be scanned out. For example https://www.espruino.com/Charlieplex should allow you to use 4 IO pins to drive up to 12 LEDs on each side (but if you need to light more than one at once there may be some flicker when Espruino is busy driving the screen).
... or if you can get away with 5mm LEDs (you use 3mm currently?) you could use 5mm individually addressable LEDs like APA106 (https://www.espruino.com/WS2811) so then you only need 3 wires - ground, power and data, and you could set the colour to exactly which RGB value you want.
Also I really like '30 AWG Kynar wire' - Kynar is the type of insulation and it's pretty strong but super thin, and doesn't melt when you try and solder the wire. If your LEDs were wired using that it should put a lot less stress on the motor - even if you're trying to get 8 wires in. Only downside is it's a bit too thin to poke into the protoboard you're using