OTOH, doing dumb (but consistent/logical) things with players' input could enhance a metalesson about how computers often misunderstand intent, or common overfl

OTOH, doing dumb (but consistent/logical) things with players' input could enhance a metalesson about how computers often misunderstand intent, or common overflow/format/etc bugs. With such a simple core game, figuring-out-the-underspecified-rules-of-the-game can be part of the true metagame. Or as an easter egg, maybe you can enter binary & others - but precisely, as a programmer must, as `0b00000000` (etc).