I've always wanted something like this board, buttons which can light up (preferably a few colours), to use to make games. Anyone ever found such a board which is hackable / programmable?
Novation Launchpad used to be exactly that: you send MIDI CC messages with proper values and you can light up the grid (with different colors).
Did that a few years back, i guess this might still be possible
https://www.adafruit.com/category/280, they're ready made from 4x4 to 16x8 but in theory you can just put more modules into an enclosure.