I got pissed off that one half of my split keyboard got defected and my backlight doesn't work anymore.
So I implemented a custom firmware that runs A REAL snake game on the working half's backlight that I can control from the other half :D
It is a real game engine with random food points and increasing tick rate. The whole game is just about 1.2kb in binary and works entirely on the 8-bit board back to back with the standard programmable firmware.