Re:Tetris-OS: An operating system that only plays Tetris
by grishka on Wednesday April 21, 2021 @01:11AM
(#26885651)
Even in embedded systems, there's still usually a distinct boundary between the OS kernel and the "application", and a well-defined API between the two.
I do see where you're coming from, though. Personally I would've described it as "bootable Tetris".