Don't know if this is really the right place for this, but I can't imagine trying to do this on windows! Not saying it couldn't be done, but I wouldn't know where to start
I got a new laptop with a backlit RGB keyboard, but no capslock, numlock indicators. I figured I could solve that by just setting the backlight of the key if capslock is enabled. I got that working, but that's boring.
While I was doing that I realised that I was baaaasically working with a 20x6 LED display sooooo...
Behold! Playing snake on my laptop!
Source code is very specifically for my Kfocus M2 Gen 5, which I believe is just a branded Schenker KEY 17 Pro (M24)
Having said that, it could be adapted to other keyboards fairly easily: